./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 01:16:55,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 01:16:55,167 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 01:16:55,178 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 01:16:55,178 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 01:16:55,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 01:16:55,227 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 01:16:55,227 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 01:16:55,228 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 01:16:55,228 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 01:16:55,228 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 01:16:55,228 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 01:16:55,229 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 01:16:55,229 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 01:16:55,229 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 01:16:55,229 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 01:16:55,229 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 01:16:55,230 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 01:16:55,231 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 01:16:55,231 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 01:16:55,231 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 01:16:55,231 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:16:55,231 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:16:55,231 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:16:55,231 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:16:55,231 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:16:55,232 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 01:16:55,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 01:16:55,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 01:16:55,233 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 01:16:55,233 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 01:16:55,233 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness 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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) 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 -> 60539e5483ee028af31550fcc6bdc40a30b35263f2407e34b5392a698998aa9c [2024-11-24 01:16:55,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 01:16:55,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 01:16:55,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 01:16:55,626 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 01:16:55,627 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 01:16:55,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-24 01:16:59,283 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/data/d8cce0e91/200d5abc05a34264a04f5be94de05a57/FLAG010dc6a84 [2024-11-24 01:16:59,690 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 01:16:59,691 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/sv-benchmarks/c/weaver/chl-chromosome-subst.wvr.c [2024-11-24 01:16:59,708 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/data/d8cce0e91/200d5abc05a34264a04f5be94de05a57/FLAG010dc6a84 [2024-11-24 01:16:59,727 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/data/d8cce0e91/200d5abc05a34264a04f5be94de05a57 [2024-11-24 01:16:59,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 01:16:59,732 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 01:16:59,733 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 01:16:59,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 01:16:59,740 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 01:16:59,741 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:16:59" (1/1) ... [2024-11-24 01:16:59,742 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52840cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:16:59, skipping insertion in model container [2024-11-24 01:16:59,743 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 01:16:59" (1/1) ... [2024-11-24 01:16:59,769 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 01:17:00,019 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 01:17:00,024 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:17:00,038 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 01:17:00,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 01:17:00,096 INFO L204 MainTranslator]: Completed translation [2024-11-24 01:17:00,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00 WrapperNode [2024-11-24 01:17:00,097 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 01:17:00,098 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 01:17:00,098 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 01:17:00,098 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 01:17:00,107 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,118 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,155 INFO L138 Inliner]: procedures = 25, calls = 33, calls flagged for inlining = 18, calls inlined = 26, statements flattened = 267 [2024-11-24 01:17:00,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 01:17:00,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 01:17:00,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 01:17:00,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 01:17:00,168 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,173 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,196 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-24 01:17:00,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,225 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,241 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,243 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,249 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,256 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 01:17:00,257 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 01:17:00,261 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 01:17:00,261 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 01:17:00,263 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (1/1) ... [2024-11-24 01:17:00,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 01:17:00,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:00,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 01:17:00,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 01:17:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 01:17:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 01:17:00,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 01:17:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 01:17:00,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 01:17:00,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-24 01:17:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-24 01:17:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 01:17:00,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 01:17:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 01:17:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 01:17:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 01:17:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 01:17:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 01:17:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 01:17:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 01:17:00,375 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 01:17:00,567 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 01:17:00,570 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 01:17:01,505 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 01:17:01,509 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 01:17:02,134 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 01:17:02,135 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-24 01:17:02,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:17:02 BoogieIcfgContainer [2024-11-24 01:17:02,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 01:17:02,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 01:17:02,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 01:17:02,143 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 01:17:02,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 01:16:59" (1/3) ... [2024-11-24 01:17:02,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45546525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:17:02, skipping insertion in model container [2024-11-24 01:17:02,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 01:17:00" (2/3) ... [2024-11-24 01:17:02,144 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45546525 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 01:17:02, skipping insertion in model container [2024-11-24 01:17:02,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 01:17:02" (3/3) ... [2024-11-24 01:17:02,145 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-chromosome-subst.wvr.c [2024-11-24 01:17:02,162 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 01:17:02,164 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-chromosome-subst.wvr.c that has 4 procedures, 55 locations, 1 initial locations, 6 loop locations, and 20 error locations. [2024-11-24 01:17:02,164 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 01:17:02,258 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-24 01:17:02,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-24 01:17:02,351 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-24 01:17:02,354 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 01:17:02,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 144 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2024-11-24 01:17:02,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-24 01:17:02,362 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-24 01:17:02,377 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 01:17:02,393 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@747e2c2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 01:17:02,393 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-24 01:17:02,437 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 01:17:02,437 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-24 01:17:02,437 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 01:17:02,438 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:02,439 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:17:02,439 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:02,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 887312, now seen corresponding path program 1 times [2024-11-24 01:17:02,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:02,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990113339] [2024-11-24 01:17:02,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:02,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:02,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990113339] [2024-11-24 01:17:02,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990113339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:17:02,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:17:02,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 01:17:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72369363] [2024-11-24 01:17:02,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:02,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 01:17:02,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:02,836 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 01:17:02,837 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 01:17:02,892 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-24 01:17:02,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:02,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:02,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-24 01:17:02,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:03,138 INFO L124 PetriNetUnfolderBase]: 202/443 cut-off events. [2024-11-24 01:17:03,139 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-24 01:17:03,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 443 events. 202/443 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2079 event pairs, 124 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 672. Up to 293 conditions per place. [2024-11-24 01:17:03,156 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 27 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-24 01:17:03,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 178 flow [2024-11-24 01:17:03,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:17:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:17:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-24 01:17:03,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-11-24 01:17:03,177 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 111 transitions. [2024-11-24 01:17:03,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 178 flow [2024-11-24 01:17:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:17:03,192 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-24 01:17:03,196 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-24 01:17:03,205 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-24 01:17:03,205 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-24 01:17:03,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:03,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:03,206 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 01:17:03,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 01:17:03,206 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:03,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:03,209 INFO L85 PathProgramCache]: Analyzing trace with hash 887313, now seen corresponding path program 1 times [2024-11-24 01:17:03,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:03,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757592067] [2024-11-24 01:17:03,210 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:03,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:03,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:03,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757592067] [2024-11-24 01:17:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757592067] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:17:03,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:17:03,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:17:03,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759667538] [2024-11-24 01:17:03,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:03,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:17:03,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:03,681 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:17:03,681 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:17:03,773 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-24 01:17:03,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:03,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:03,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-24 01:17:03,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:04,144 INFO L124 PetriNetUnfolderBase]: 202/449 cut-off events. [2024-11-24 01:17:04,144 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-24 01:17:04,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 777 conditions, 449 events. 202/449 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2072 event pairs, 124 based on Foata normal form. 1/364 useless extension candidates. Maximal degree in co-relation 734. Up to 305 conditions per place. [2024-11-24 01:17:04,151 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 32 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-24 01:17:04,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 57 transitions, 200 flow [2024-11-24 01:17:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:17:04,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:17:04,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 122 transitions. [2024-11-24 01:17:04,154 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6777777777777778 [2024-11-24 01:17:04,155 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 3 states and 122 transitions. [2024-11-24 01:17:04,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 57 transitions, 200 flow [2024-11-24 01:17:04,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:17:04,159 INFO L231 Difference]: Finished difference. Result has 52 places, 54 transitions, 146 flow [2024-11-24 01:17:04,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=52, PETRI_TRANSITIONS=54} [2024-11-24 01:17:04,160 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-24 01:17:04,161 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 54 transitions, 146 flow [2024-11-24 01:17:04,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.75) internal successors, (107), 4 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:04,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:04,161 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-24 01:17:04,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 01:17:04,162 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:04,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:04,163 INFO L85 PathProgramCache]: Analyzing trace with hash 852735972, now seen corresponding path program 1 times [2024-11-24 01:17:04,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:04,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468315946] [2024-11-24 01:17:04,163 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:04,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468315946] [2024-11-24 01:17:04,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468315946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333124557] [2024-11-24 01:17:04,533 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:04,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:04,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:04,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 01:17:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:04,671 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-24 01:17:04,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:04,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:04,869 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:05,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333124557] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:17:05,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:17:05,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-24 01:17:05,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029962074] [2024-11-24 01:17:05,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:17:05,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-24 01:17:05,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:05,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-24 01:17:05,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:17:05,333 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-24 01:17:05,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 54 transitions, 146 flow. Second operand has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:05,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:05,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-24 01:17:05,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:05,850 INFO L124 PetriNetUnfolderBase]: 208/473 cut-off events. [2024-11-24 01:17:05,851 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-24 01:17:05,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 473 events. 208/473 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2134 event pairs, 124 based on Foata normal form. 3/392 useless extension candidates. Maximal degree in co-relation 766. Up to 307 conditions per place. [2024-11-24 01:17:05,860 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 41 selfloop transitions, 21 changer transitions 0/81 dead transitions. [2024-11-24 01:17:05,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 81 transitions, 358 flow [2024-11-24 01:17:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:17:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:17:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-24 01:17:05,866 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-24 01:17:05,869 INFO L175 Difference]: Start difference. First operand has 52 places, 54 transitions, 146 flow. Second operand 6 states and 230 transitions. [2024-11-24 01:17:05,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 81 transitions, 358 flow [2024-11-24 01:17:05,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 81 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 01:17:05,875 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 292 flow [2024-11-24 01:17:05,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=292, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2024-11-24 01:17:05,878 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -1 predicate places. [2024-11-24 01:17:05,878 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 292 flow [2024-11-24 01:17:05,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 27.666666666666668) internal successors, (249), 9 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:05,880 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:05,880 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-24 01:17:05,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 01:17:06,084 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:06,085 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:06,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:06,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1253969117, now seen corresponding path program 2 times [2024-11-24 01:17:06,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:06,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568384893] [2024-11-24 01:17:06,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:17:06,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:06,133 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:17:06,137 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:17:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:06,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:06,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568384893] [2024-11-24 01:17:06,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568384893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:06,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932973200] [2024-11-24 01:17:06,796 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:17:06,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:06,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:06,799 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:06,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 01:17:06,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:17:06,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:17:06,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-24 01:17:06,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:06,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:07,220 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:07,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 01:17:07,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932973200] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:17:07,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:17:07,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-24 01:17:07,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514986283] [2024-11-24 01:17:07,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:17:07,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-24 01:17:07,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:07,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-24 01:17:07,497 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2024-11-24 01:17:08,574 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-24 01:17:08,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 292 flow. Second operand has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:08,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:08,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-24 01:17:08,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:09,557 INFO L124 PetriNetUnfolderBase]: 211/479 cut-off events. [2024-11-24 01:17:09,557 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-24 01:17:09,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 916 conditions, 479 events. 211/479 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2156 event pairs, 124 based on Foata normal form. 6/404 useless extension candidates. Maximal degree in co-relation 798. Up to 296 conditions per place. [2024-11-24 01:17:09,562 INFO L140 encePairwiseOnDemand]: 47/60 looper letters, 34 selfloop transitions, 34 changer transitions 0/87 dead transitions. [2024-11-24 01:17:09,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 464 flow [2024-11-24 01:17:09,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 01:17:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 01:17:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 308 transitions. [2024-11-24 01:17:09,565 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-11-24 01:17:09,565 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 292 flow. Second operand 9 states and 308 transitions. [2024-11-24 01:17:09,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 464 flow [2024-11-24 01:17:09,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 378 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-24 01:17:09,570 INFO L231 Difference]: Finished difference. Result has 60 places, 75 transitions, 304 flow [2024-11-24 01:17:09,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=304, PETRI_PLACES=60, PETRI_TRANSITIONS=75} [2024-11-24 01:17:09,571 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-11-24 01:17:09,571 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 75 transitions, 304 flow [2024-11-24 01:17:09,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 27.833333333333332) internal successors, (501), 18 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:09,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:09,572 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:09,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-24 01:17:09,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:09,772 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:09,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:09,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1670187568, now seen corresponding path program 1 times [2024-11-24 01:17:09,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:09,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961904953] [2024-11-24 01:17:09,773 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 01:17:10,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961904953] [2024-11-24 01:17:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961904953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26484281] [2024-11-24 01:17:10,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:10,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:10,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 01:17:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:10,185 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 01:17:10,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 01:17:10,256 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:10,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 01:17:10,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26484281] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:17:10,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:17:10,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-24 01:17:10,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365656801] [2024-11-24 01:17:10,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:17:10,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:17:10,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:10,319 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:17:10,319 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2024-11-24 01:17:10,366 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-24 01:17:10,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 75 transitions, 304 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:10,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:10,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-24 01:17:10,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:10,682 INFO L124 PetriNetUnfolderBase]: 202/470 cut-off events. [2024-11-24 01:17:10,682 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-24 01:17:10,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 887 conditions, 470 events. 202/470 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2067 event pairs, 124 based on Foata normal form. 9/398 useless extension candidates. Maximal degree in co-relation 734. Up to 299 conditions per place. [2024-11-24 01:17:10,687 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 35 selfloop transitions, 24 changer transitions 0/78 dead transitions. [2024-11-24 01:17:10,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 416 flow [2024-11-24 01:17:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:17:10,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:17:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2024-11-24 01:17:10,689 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-11-24 01:17:10,689 INFO L175 Difference]: Start difference. First operand has 60 places, 75 transitions, 304 flow. Second operand 7 states and 268 transitions. [2024-11-24 01:17:10,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 416 flow [2024-11-24 01:17:10,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 370 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-24 01:17:10,696 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 252 flow [2024-11-24 01:17:10,697 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=252, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2024-11-24 01:17:10,698 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 0 predicate places. [2024-11-24 01:17:10,700 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 252 flow [2024-11-24 01:17:10,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:10,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:10,700 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:10,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 01:17:10,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:10,901 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:10,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:10,902 INFO L85 PathProgramCache]: Analyzing trace with hash 175559659, now seen corresponding path program 2 times [2024-11-24 01:17:10,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:10,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934262953] [2024-11-24 01:17:10,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:17:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:10,945 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:17:10,945 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:17:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-24 01:17:11,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:11,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934262953] [2024-11-24 01:17:11,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934262953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:17:11,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:17:11,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 01:17:11,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499741153] [2024-11-24 01:17:11,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:11,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:17:11,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:11,165 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:17:11,165 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:17:11,223 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-24 01:17:11,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 252 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:11,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:11,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-24 01:17:11,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:11,434 INFO L124 PetriNetUnfolderBase]: 343/750 cut-off events. [2024-11-24 01:17:11,434 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-24 01:17:11,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1377 conditions, 750 events. 343/750 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4031 event pairs, 234 based on Foata normal form. 0/637 useless extension candidates. Maximal degree in co-relation 1227. Up to 494 conditions per place. [2024-11-24 01:17:11,439 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 46 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2024-11-24 01:17:11,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 346 flow [2024-11-24 01:17:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:17:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:17:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-24 01:17:11,441 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-24 01:17:11,441 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 252 flow. Second operand 5 states and 143 transitions. [2024-11-24 01:17:11,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 346 flow [2024-11-24 01:17:11,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 64 transitions, 298 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:17:11,447 INFO L231 Difference]: Finished difference. Result has 56 places, 64 transitions, 206 flow [2024-11-24 01:17:11,447 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=56, PETRI_TRANSITIONS=64} [2024-11-24 01:17:11,448 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -4 predicate places. [2024-11-24 01:17:11,450 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 64 transitions, 206 flow [2024-11-24 01:17:11,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:11,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:11,450 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:11,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-24 01:17:11,451 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:11,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:11,451 INFO L85 PathProgramCache]: Analyzing trace with hash 175559660, now seen corresponding path program 1 times [2024-11-24 01:17:11,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:11,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926577033] [2024-11-24 01:17:11,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:11,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:17:13,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:13,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926577033] [2024-11-24 01:17:13,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926577033] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971033874] [2024-11-24 01:17:13,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:13,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:13,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:13,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:13,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 01:17:13,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:13,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 01:17:13,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:13,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:13,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:13,607 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-24 01:17:13,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-24 01:17:13,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:17:14,020 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:17:14,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 01:17:14,073 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-24 01:17:14,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-24 01:17:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:14,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:16,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971033874] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:16,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:17:16,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 9] total 33 [2024-11-24 01:17:16,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150878538] [2024-11-24 01:17:16,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:16,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:17:16,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:16,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:17:16,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=950, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 01:17:17,245 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-24 01:17:17,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 64 transitions, 206 flow. Second operand has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:17,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:17,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-24 01:17:17,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:18,059 INFO L124 PetriNetUnfolderBase]: 604/1175 cut-off events. [2024-11-24 01:17:18,059 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-24 01:17:18,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2176 conditions, 1175 events. 604/1175 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6445 event pairs, 234 based on Foata normal form. 0/1007 useless extension candidates. Maximal degree in co-relation 2044. Up to 460 conditions per place. [2024-11-24 01:17:18,068 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 61 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2024-11-24 01:17:18,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 82 transitions, 383 flow [2024-11-24 01:17:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:17:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:17:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 233 transitions. [2024-11-24 01:17:18,071 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-11-24 01:17:18,071 INFO L175 Difference]: Start difference. First operand has 56 places, 64 transitions, 206 flow. Second operand 7 states and 233 transitions. [2024-11-24 01:17:18,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 82 transitions, 383 flow [2024-11-24 01:17:18,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 82 transitions, 378 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:17:18,074 INFO L231 Difference]: Finished difference. Result has 61 places, 65 transitions, 228 flow [2024-11-24 01:17:18,074 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=61, PETRI_TRANSITIONS=65} [2024-11-24 01:17:18,075 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-24 01:17:18,075 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 65 transitions, 228 flow [2024-11-24 01:17:18,076 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 27.90909090909091) internal successors, (307), 11 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:18,076 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:18,076 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:18,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-24 01:17:18,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:18,277 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:18,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:18,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1147383009, now seen corresponding path program 1 times [2024-11-24 01:17:18,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:18,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241597613] [2024-11-24 01:17:18,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:18,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-11-24 01:17:18,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:18,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241597613] [2024-11-24 01:17:18,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241597613] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:17:18,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:17:18,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:17:18,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917503965] [2024-11-24 01:17:18,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:18,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 01:17:18,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:18,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 01:17:18,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 01:17:18,698 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-24 01:17:18,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 65 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:18,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:18,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-24 01:17:18,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:18,942 INFO L124 PetriNetUnfolderBase]: 400/790 cut-off events. [2024-11-24 01:17:18,943 INFO L125 PetriNetUnfolderBase]: For 228/255 co-relation queries the response was YES. [2024-11-24 01:17:18,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1634 conditions, 790 events. 400/790 cut-off events. For 228/255 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3722 event pairs, 299 based on Foata normal form. 29/766 useless extension candidates. Maximal degree in co-relation 1498. Up to 592 conditions per place. [2024-11-24 01:17:18,952 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 45 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-11-24 01:17:18,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 320 flow [2024-11-24 01:17:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 01:17:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 01:17:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-11-24 01:17:18,954 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49 [2024-11-24 01:17:18,954 INFO L175 Difference]: Start difference. First operand has 61 places, 65 transitions, 228 flow. Second operand 5 states and 147 transitions. [2024-11-24 01:17:18,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 320 flow [2024-11-24 01:17:18,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 310 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-24 01:17:18,957 INFO L231 Difference]: Finished difference. Result has 58 places, 63 transitions, 220 flow [2024-11-24 01:17:18,957 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=58, PETRI_TRANSITIONS=63} [2024-11-24 01:17:18,958 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-11-24 01:17:18,958 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 63 transitions, 220 flow [2024-11-24 01:17:18,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:18,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:18,959 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:18,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-24 01:17:18,959 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:18,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1147383010, now seen corresponding path program 1 times [2024-11-24 01:17:18,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:18,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934037562] [2024-11-24 01:17:18,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:18,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934037562] [2024-11-24 01:17:19,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934037562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15953858] [2024-11-24 01:17:19,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:19,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:19,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:19,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 01:17:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:20,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-24 01:17:20,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:20,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:20,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:20,246 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:17:20,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 01:17:20,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:17:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:20,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:21,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15953858] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:21,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:17:21,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-24 01:17:21,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162580047] [2024-11-24 01:17:21,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:21,419 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:17:21,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:21,420 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:17:21,420 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:17:21,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-24 01:17:21,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 63 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:21,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:21,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-24 01:17:21,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:22,433 INFO L124 PetriNetUnfolderBase]: 400/786 cut-off events. [2024-11-24 01:17:22,433 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2024-11-24 01:17:22,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1648 conditions, 786 events. 400/786 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3618 event pairs, 169 based on Foata normal form. 26/738 useless extension candidates. Maximal degree in co-relation 1512. Up to 377 conditions per place. [2024-11-24 01:17:22,442 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 60 selfloop transitions, 5 changer transitions 0/80 dead transitions. [2024-11-24 01:17:22,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 80 transitions, 392 flow [2024-11-24 01:17:22,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:17:22,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:17:22,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-24 01:17:22,445 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-24 01:17:22,445 INFO L175 Difference]: Start difference. First operand has 58 places, 63 transitions, 220 flow. Second operand 6 states and 216 transitions. [2024-11-24 01:17:22,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 80 transitions, 392 flow [2024-11-24 01:17:22,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 387 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:17:22,449 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 236 flow [2024-11-24 01:17:22,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=236, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-11-24 01:17:22,451 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-24 01:17:22,452 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 236 flow [2024-11-24 01:17:22,452 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:22,453 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:22,453 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:22,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-24 01:17:22,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:22,654 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:22,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:22,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1160075939, now seen corresponding path program 1 times [2024-11-24 01:17:22,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:22,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583184475] [2024-11-24 01:17:22,656 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:22,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:17:24,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:24,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583184475] [2024-11-24 01:17:24,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583184475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:24,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541682515] [2024-11-24 01:17:24,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:24,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:24,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:24,471 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:24,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 01:17:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:24,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 01:17:24,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:24,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:24,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:24,856 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-24 01:17:24,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-24 01:17:24,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:17:25,107 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:17:25,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 01:17:25,141 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-24 01:17:25,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-24 01:17:25,817 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:25,818 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:27,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541682515] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:27,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:17:27,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [15, 9] total 33 [2024-11-24 01:17:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582334935] [2024-11-24 01:17:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:27,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 01:17:27,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:27,013 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 01:17:27,014 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=954, Unknown=0, NotChecked=0, Total=1190 [2024-11-24 01:17:27,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-24 01:17:27,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 236 flow. Second operand has 11 states, 11 states have (on average 28.09090909090909) internal successors, (309), 11 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:27,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:27,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-24 01:17:27,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:28,883 INFO L124 PetriNetUnfolderBase]: 1045/1989 cut-off events. [2024-11-24 01:17:28,884 INFO L125 PetriNetUnfolderBase]: For 1224/1294 co-relation queries the response was YES. [2024-11-24 01:17:28,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4314 conditions, 1989 events. 1045/1989 cut-off events. For 1224/1294 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 12060 event pairs, 439 based on Foata normal form. 0/1739 useless extension candidates. Maximal degree in co-relation 4176. Up to 812 conditions per place. [2024-11-24 01:17:28,898 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 63 selfloop transitions, 7 changer transitions 0/82 dead transitions. [2024-11-24 01:17:28,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 82 transitions, 438 flow [2024-11-24 01:17:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 01:17:28,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 01:17:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 231 transitions. [2024-11-24 01:17:28,902 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-24 01:17:28,902 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 236 flow. Second operand 7 states and 231 transitions. [2024-11-24 01:17:28,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 82 transitions, 438 flow [2024-11-24 01:17:28,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 82 transitions, 428 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 01:17:28,906 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 255 flow [2024-11-24 01:17:28,909 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-11-24 01:17:28,909 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 5 predicate places. [2024-11-24 01:17:28,910 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 255 flow [2024-11-24 01:17:28,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 28.09090909090909) internal successors, (309), 11 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:28,910 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:28,910 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:28,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 01:17:29,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-24 01:17:29,116 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:29,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:29,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1602616595, now seen corresponding path program 1 times [2024-11-24 01:17:29,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:29,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361547552] [2024-11-24 01:17:29,117 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-24 01:17:29,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:29,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361547552] [2024-11-24 01:17:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361547552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:17:29,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:17:29,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 01:17:29,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528923625] [2024-11-24 01:17:29,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:29,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:17:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:29,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:17:29,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:17:29,348 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-24 01:17:29,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:29,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:29,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-24 01:17:29,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:29,617 INFO L124 PetriNetUnfolderBase]: 525/1088 cut-off events. [2024-11-24 01:17:29,617 INFO L125 PetriNetUnfolderBase]: For 807/899 co-relation queries the response was YES. [2024-11-24 01:17:29,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2560 conditions, 1088 events. 525/1088 cut-off events. For 807/899 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 6011 event pairs, 406 based on Foata normal form. 31/1038 useless extension candidates. Maximal degree in co-relation 2419. Up to 773 conditions per place. [2024-11-24 01:17:29,626 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 46 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-24 01:17:29,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 63 transitions, 347 flow [2024-11-24 01:17:29,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:17:29,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:17:29,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-24 01:17:29,627 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-24 01:17:29,628 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 255 flow. Second operand 4 states and 127 transitions. [2024-11-24 01:17:29,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 63 transitions, 347 flow [2024-11-24 01:17:29,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 337 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-24 01:17:29,631 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 245 flow [2024-11-24 01:17:29,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-11-24 01:17:29,632 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 1 predicate places. [2024-11-24 01:17:29,632 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 245 flow [2024-11-24 01:17:29,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:29,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:29,632 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:29,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-24 01:17:29,633 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:29,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:29,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1602616596, now seen corresponding path program 1 times [2024-11-24 01:17:29,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:29,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522161106] [2024-11-24 01:17:29,634 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:29,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:30,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:30,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522161106] [2024-11-24 01:17:30,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522161106] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:30,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735009997] [2024-11-24 01:17:30,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:30,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:30,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:30,225 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:30,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 01:17:30,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:30,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 01:17:30,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:30,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:30,682 INFO L378 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 22 treesize of output 18 [2024-11-24 01:17:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:30,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735009997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:17:30,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:17:30,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-24 01:17:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340406708] [2024-11-24 01:17:30,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:17:30,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:17:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:30,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:17:30,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:17:31,781 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-24 01:17:31,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 245 flow. Second operand has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:31,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:31,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-24 01:17:31,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:32,763 INFO L124 PetriNetUnfolderBase]: 888/1731 cut-off events. [2024-11-24 01:17:32,764 INFO L125 PetriNetUnfolderBase]: For 1144/1263 co-relation queries the response was YES. [2024-11-24 01:17:32,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 1731 events. 888/1731 cut-off events. For 1144/1263 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9953 event pairs, 315 based on Foata normal form. 92/1729 useless extension candidates. Maximal degree in co-relation 4046. Up to 650 conditions per place. [2024-11-24 01:17:32,781 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 74 selfloop transitions, 19 changer transitions 0/107 dead transitions. [2024-11-24 01:17:32,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 107 transitions, 587 flow [2024-11-24 01:17:32,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:17:32,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:17:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-24 01:17:32,788 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-24 01:17:32,788 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 245 flow. Second operand 10 states and 366 transitions. [2024-11-24 01:17:32,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 107 transitions, 587 flow [2024-11-24 01:17:32,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 107 transitions, 584 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 01:17:32,794 INFO L231 Difference]: Finished difference. Result has 70 places, 65 transitions, 300 flow [2024-11-24 01:17:32,794 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=300, PETRI_PLACES=70, PETRI_TRANSITIONS=65} [2024-11-24 01:17:32,795 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-11-24 01:17:32,795 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 65 transitions, 300 flow [2024-11-24 01:17:32,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.24) internal successors, (756), 25 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:32,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:32,798 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:32,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 01:17:32,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:32,999 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:32,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:32,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1171492633, now seen corresponding path program 1 times [2024-11-24 01:17:33,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:33,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475601029] [2024-11-24 01:17:33,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:33,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:33,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-11-24 01:17:33,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475601029] [2024-11-24 01:17:33,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475601029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:33,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762572178] [2024-11-24 01:17:33,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:33,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:33,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:33,766 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:33,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 01:17:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:33,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 01:17:34,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:34,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:34,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:34,166 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-24 01:17:34,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-24 01:17:34,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:17:34,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:17:34,674 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:17:34,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2024-11-24 01:17:34,688 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:17:34,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 01:17:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:34,870 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:36,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762572178] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:17:36,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:17:36,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 26 [2024-11-24 01:17:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744686727] [2024-11-24 01:17:36,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:17:36,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-24 01:17:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:36,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-24 01:17:36,102 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2024-11-24 01:17:38,673 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-24 01:17:38,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 65 transitions, 300 flow. Second operand has 28 states, 28 states have (on average 23.214285714285715) internal successors, (650), 28 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:38,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:38,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-24 01:17:38,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:40,838 INFO L124 PetriNetUnfolderBase]: 3421/5883 cut-off events. [2024-11-24 01:17:40,838 INFO L125 PetriNetUnfolderBase]: For 5815/5969 co-relation queries the response was YES. [2024-11-24 01:17:40,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15501 conditions, 5883 events. 3421/5883 cut-off events. For 5815/5969 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 36550 event pairs, 648 based on Foata normal form. 246/6072 useless extension candidates. Maximal degree in co-relation 15344. Up to 1130 conditions per place. [2024-11-24 01:17:40,902 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 130 selfloop transitions, 18 changer transitions 0/158 dead transitions. [2024-11-24 01:17:40,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 158 transitions, 953 flow [2024-11-24 01:17:40,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:17:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:17:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 399 transitions. [2024-11-24 01:17:40,906 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5115384615384615 [2024-11-24 01:17:40,906 INFO L175 Difference]: Start difference. First operand has 70 places, 65 transitions, 300 flow. Second operand 13 states and 399 transitions. [2024-11-24 01:17:40,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 158 transitions, 953 flow [2024-11-24 01:17:40,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 158 transitions, 922 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:17:40,921 INFO L231 Difference]: Finished difference. Result has 80 places, 68 transitions, 343 flow [2024-11-24 01:17:40,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=343, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2024-11-24 01:17:40,922 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 20 predicate places. [2024-11-24 01:17:40,923 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 343 flow [2024-11-24 01:17:40,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 23.214285714285715) internal successors, (650), 28 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:40,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:40,925 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:40,938 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 01:17:41,125 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:41,126 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:41,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:41,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1892060750, now seen corresponding path program 1 times [2024-11-24 01:17:41,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:41,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871830093] [2024-11-24 01:17:41,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:41,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:41,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871830093] [2024-11-24 01:17:41,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871830093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:41,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858531842] [2024-11-24 01:17:41,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:41,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:41,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:41,857 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:41,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 01:17:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:42,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-24 01:17:42,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:42,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:42,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:42,199 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:17:42,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 01:17:42,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:17:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:42,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:43,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858531842] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:43,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 01:17:43,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9, 9] total 25 [2024-11-24 01:17:43,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148785420] [2024-11-24 01:17:43,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:17:43,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-24 01:17:43,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:43,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-24 01:17:43,417 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:17:43,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-24 01:17:43,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 343 flow. Second operand has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:43,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:43,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-24 01:17:43,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:45,061 INFO L124 PetriNetUnfolderBase]: 3512/5930 cut-off events. [2024-11-24 01:17:45,061 INFO L125 PetriNetUnfolderBase]: For 11996/12710 co-relation queries the response was YES. [2024-11-24 01:17:45,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16784 conditions, 5930 events. 3512/5930 cut-off events. For 11996/12710 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 38517 event pairs, 1805 based on Foata normal form. 0/5648 useless extension candidates. Maximal degree in co-relation 16626. Up to 2958 conditions per place. [2024-11-24 01:17:45,207 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 66 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-24 01:17:45,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 593 flow [2024-11-24 01:17:45,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 01:17:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 01:17:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 207 transitions. [2024-11-24 01:17:45,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-24 01:17:45,209 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 343 flow. Second operand 6 states and 207 transitions. [2024-11-24 01:17:45,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 593 flow [2024-11-24 01:17:45,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 586 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 01:17:45,219 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 363 flow [2024-11-24 01:17:45,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=363, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2024-11-24 01:17:45,222 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 24 predicate places. [2024-11-24 01:17:45,223 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 363 flow [2024-11-24 01:17:45,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 29.5) internal successors, (295), 10 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:45,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:45,223 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:45,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-24 01:17:45,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-24 01:17:45,424 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:45,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1956532409, now seen corresponding path program 1 times [2024-11-24 01:17:45,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:45,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79371012] [2024-11-24 01:17:45,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:45,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:45,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:46,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79371012] [2024-11-24 01:17:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79371012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:46,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241512036] [2024-11-24 01:17:46,048 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:46,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:46,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:46,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:46,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 01:17:46,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:46,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 01:17:46,270 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:46,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:46,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:46,393 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:17:46,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 01:17:46,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:17:47,021 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:47,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241512036] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:17:47,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:17:47,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-24 01:17:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369928731] [2024-11-24 01:17:47,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:17:47,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-24 01:17:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:47,805 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-24 01:17:47,805 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-24 01:17:50,045 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-24 01:17:50,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 363 flow. Second operand has 28 states, 28 states have (on average 24.142857142857142) internal successors, (676), 28 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:50,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:50,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-24 01:17:50,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:17:51,898 INFO L124 PetriNetUnfolderBase]: 2692/4927 cut-off events. [2024-11-24 01:17:51,898 INFO L125 PetriNetUnfolderBase]: For 9586/9882 co-relation queries the response was YES. [2024-11-24 01:17:51,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15354 conditions, 4927 events. 2692/4927 cut-off events. For 9586/9882 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 33495 event pairs, 701 based on Foata normal form. 258/5099 useless extension candidates. Maximal degree in co-relation 15192. Up to 1247 conditions per place. [2024-11-24 01:17:51,948 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 117 selfloop transitions, 21 changer transitions 0/154 dead transitions. [2024-11-24 01:17:51,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 990 flow [2024-11-24 01:17:51,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:17:51,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 01:17:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 499 transitions. [2024-11-24 01:17:51,955 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4892156862745098 [2024-11-24 01:17:51,955 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 363 flow. Second operand 17 states and 499 transitions. [2024-11-24 01:17:51,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 990 flow [2024-11-24 01:17:51,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 154 transitions, 970 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-24 01:17:51,980 INFO L231 Difference]: Finished difference. Result has 99 places, 70 transitions, 418 flow [2024-11-24 01:17:51,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=418, PETRI_PLACES=99, PETRI_TRANSITIONS=70} [2024-11-24 01:17:51,982 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 39 predicate places. [2024-11-24 01:17:51,982 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 70 transitions, 418 flow [2024-11-24 01:17:51,982 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 24.142857142857142) internal successors, (676), 28 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:51,982 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:17:51,983 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:17:51,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-24 01:17:52,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 01:17:52,187 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:17:52,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:17:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1778680391, now seen corresponding path program 1 times [2024-11-24 01:17:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:17:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055267110] [2024-11-24 01:17:52,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:52,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:17:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:53,258 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 29 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-24 01:17:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:17:53,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055267110] [2024-11-24 01:17:53,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055267110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:17:53,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547657695] [2024-11-24 01:17:53,259 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:17:53,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:17:53,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:17:53,262 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:17:53,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 01:17:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:17:53,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 01:17:53,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:17:53,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:17:53,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:17:53,654 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-24 01:17:53,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-24 01:17:53,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:17:53,802 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:17:53,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 01:17:53,819 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:17:53,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 01:17:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:54,375 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:17:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:17:55,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547657695] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:17:55,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:17:55,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 34 [2024-11-24 01:17:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186022279] [2024-11-24 01:17:55,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:17:55,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-24 01:17:55,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:17:55,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-24 01:17:55,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2024-11-24 01:17:57,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-11-24 01:17:57,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 70 transitions, 418 flow. Second operand has 36 states, 36 states have (on average 20.305555555555557) internal successors, (731), 36 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:17:57,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:17:57,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-11-24 01:17:57,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:00,333 INFO L124 PetriNetUnfolderBase]: 8355/14143 cut-off events. [2024-11-24 01:18:00,334 INFO L125 PetriNetUnfolderBase]: For 33217/34411 co-relation queries the response was YES. [2024-11-24 01:18:00,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44365 conditions, 14143 events. 8355/14143 cut-off events. For 33217/34411 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 101665 event pairs, 1620 based on Foata normal form. 651/14671 useless extension candidates. Maximal degree in co-relation 44186. Up to 2806 conditions per place. [2024-11-24 01:18:00,455 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 137 selfloop transitions, 22 changer transitions 0/170 dead transitions. [2024-11-24 01:18:00,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 170 transitions, 1326 flow [2024-11-24 01:18:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:18:00,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 01:18:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 432 transitions. [2024-11-24 01:18:00,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4235294117647059 [2024-11-24 01:18:00,458 INFO L175 Difference]: Start difference. First operand has 99 places, 70 transitions, 418 flow. Second operand 17 states and 432 transitions. [2024-11-24 01:18:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 170 transitions, 1326 flow [2024-11-24 01:18:00,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 170 transitions, 1250 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-11-24 01:18:00,503 INFO L231 Difference]: Finished difference. Result has 110 places, 72 transitions, 457 flow [2024-11-24 01:18:00,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=457, PETRI_PLACES=110, PETRI_TRANSITIONS=72} [2024-11-24 01:18:00,504 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 50 predicate places. [2024-11-24 01:18:00,504 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 72 transitions, 457 flow [2024-11-24 01:18:00,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 20.305555555555557) internal successors, (731), 36 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:00,505 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:00,505 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:00,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 01:18:00,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 01:18:00,710 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:18:00,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:00,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1475659758, now seen corresponding path program 1 times [2024-11-24 01:18:00,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:00,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313836507] [2024-11-24 01:18:00,711 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:01,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:01,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313836507] [2024-11-24 01:18:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313836507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:01,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834340796] [2024-11-24 01:18:01,269 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:01,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:01,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:01,272 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:01,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 01:18:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:01,494 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-24 01:18:01,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:01,713 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:01,713 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:01,816 INFO L378 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 22 treesize of output 18 [2024-11-24 01:18:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:01,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834340796] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:01,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:01,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-24 01:18:01,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177297746] [2024-11-24 01:18:01,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:01,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 01:18:01,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:01,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 01:18:01,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-24 01:18:02,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-24 01:18:02,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 72 transitions, 457 flow. Second operand has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:02,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:02,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-24 01:18:02,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:05,688 INFO L124 PetriNetUnfolderBase]: 6203/11434 cut-off events. [2024-11-24 01:18:05,688 INFO L125 PetriNetUnfolderBase]: For 31971/33155 co-relation queries the response was YES. [2024-11-24 01:18:05,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36338 conditions, 11434 events. 6203/11434 cut-off events. For 31971/33155 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 90791 event pairs, 2903 based on Foata normal form. 644/11623 useless extension candidates. Maximal degree in co-relation 36152. Up to 4940 conditions per place. [2024-11-24 01:18:05,792 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 88 selfloop transitions, 19 changer transitions 0/124 dead transitions. [2024-11-24 01:18:05,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 124 transitions, 1013 flow [2024-11-24 01:18:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 01:18:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 01:18:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 362 transitions. [2024-11-24 01:18:05,795 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-11-24 01:18:05,795 INFO L175 Difference]: Start difference. First operand has 110 places, 72 transitions, 457 flow. Second operand 10 states and 362 transitions. [2024-11-24 01:18:05,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 124 transitions, 1013 flow [2024-11-24 01:18:05,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 124 transitions, 961 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-24 01:18:05,847 INFO L231 Difference]: Finished difference. Result has 112 places, 74 transitions, 483 flow [2024-11-24 01:18:05,847 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=483, PETRI_PLACES=112, PETRI_TRANSITIONS=74} [2024-11-24 01:18:05,848 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 52 predicate places. [2024-11-24 01:18:05,848 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 74 transitions, 483 flow [2024-11-24 01:18:05,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.48) internal successors, (762), 25 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:05,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:05,849 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:05,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-24 01:18:06,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-24 01:18:06,054 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:18:06,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:06,055 INFO L85 PathProgramCache]: Analyzing trace with hash 769850163, now seen corresponding path program 1 times [2024-11-24 01:18:06,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:06,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308451762] [2024-11-24 01:18:06,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:06,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:06,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:06,751 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:06,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:06,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308451762] [2024-11-24 01:18:06,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308451762] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:06,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977263262] [2024-11-24 01:18:06,752 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:06,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:06,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:06,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:06,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 01:18:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:06,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 01:18:06,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:06,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:18:07,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:18:07,112 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:18:07,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 01:18:07,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 9 [2024-11-24 01:18:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:07,668 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:08,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977263262] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:08,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:08,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-24 01:18:08,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233877271] [2024-11-24 01:18:08,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:08,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 01:18:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:08,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 01:18:08,360 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2024-11-24 01:18:09,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-24 01:18:09,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 74 transitions, 483 flow. Second operand has 29 states, 29 states have (on average 23.586206896551722) internal successors, (684), 29 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:09,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:09,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-24 01:18:09,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:14,958 INFO L124 PetriNetUnfolderBase]: 11907/19944 cut-off events. [2024-11-24 01:18:14,958 INFO L125 PetriNetUnfolderBase]: For 58255/60575 co-relation queries the response was YES. [2024-11-24 01:18:15,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66379 conditions, 19944 events. 11907/19944 cut-off events. For 58255/60575 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 152448 event pairs, 2903 based on Foata normal form. 966/20565 useless extension candidates. Maximal degree in co-relation 66186. Up to 4618 conditions per place. [2024-11-24 01:18:15,125 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 129 selfloop transitions, 22 changer transitions 0/166 dead transitions. [2024-11-24 01:18:15,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 166 transitions, 1383 flow [2024-11-24 01:18:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 01:18:15,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 01:18:15,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 470 transitions. [2024-11-24 01:18:15,128 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46078431372549017 [2024-11-24 01:18:15,128 INFO L175 Difference]: Start difference. First operand has 112 places, 74 transitions, 483 flow. Second operand 17 states and 470 transitions. [2024-11-24 01:18:15,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 166 transitions, 1383 flow [2024-11-24 01:18:15,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 166 transitions, 1352 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 01:18:15,309 INFO L231 Difference]: Finished difference. Result has 126 places, 76 transitions, 527 flow [2024-11-24 01:18:15,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=527, PETRI_PLACES=126, PETRI_TRANSITIONS=76} [2024-11-24 01:18:15,310 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2024-11-24 01:18:15,310 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 76 transitions, 527 flow [2024-11-24 01:18:15,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 23.586206896551722) internal successors, (684), 29 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:15,311 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:15,311 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:15,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 01:18:15,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 01:18:15,516 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:18:15,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 230089940, now seen corresponding path program 1 times [2024-11-24 01:18:15,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:15,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491885820] [2024-11-24 01:18:15,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:16,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:16,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491885820] [2024-11-24 01:18:16,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491885820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:16,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089018940] [2024-11-24 01:18:16,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:16,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:16,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:16,039 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:16,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 01:18:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:16,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-24 01:18:16,247 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:16,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:16,812 INFO L378 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 20 [2024-11-24 01:18:17,063 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:17,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089018940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:17,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:17,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-24 01:18:17,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933105391] [2024-11-24 01:18:17,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:17,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-24 01:18:17,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:17,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-24 01:18:17,068 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-24 01:18:18,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 60 [2024-11-24 01:18:18,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 76 transitions, 527 flow. Second operand has 32 states, 32 states have (on average 29.96875) internal successors, (959), 32 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:18,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:18,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 60 [2024-11-24 01:18:18,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:24,315 INFO L124 PetriNetUnfolderBase]: 10640/20303 cut-off events. [2024-11-24 01:18:24,315 INFO L125 PetriNetUnfolderBase]: For 68756/70594 co-relation queries the response was YES. [2024-11-24 01:18:24,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71655 conditions, 20303 events. 10640/20303 cut-off events. For 68756/70594 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 175810 event pairs, 2584 based on Foata normal form. 957/20950 useless extension candidates. Maximal degree in co-relation 71457. Up to 4405 conditions per place. [2024-11-24 01:18:24,456 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 155 selfloop transitions, 22 changer transitions 0/195 dead transitions. [2024-11-24 01:18:24,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 195 transitions, 1682 flow [2024-11-24 01:18:24,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:18:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:18:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 496 transitions. [2024-11-24 01:18:24,458 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6358974358974359 [2024-11-24 01:18:24,458 INFO L175 Difference]: Start difference. First operand has 126 places, 76 transitions, 527 flow. Second operand 13 states and 496 transitions. [2024-11-24 01:18:24,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 195 transitions, 1682 flow [2024-11-24 01:18:24,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 195 transitions, 1590 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-24 01:18:24,610 INFO L231 Difference]: Finished difference. Result has 127 places, 78 transitions, 561 flow [2024-11-24 01:18:24,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=561, PETRI_PLACES=127, PETRI_TRANSITIONS=78} [2024-11-24 01:18:24,610 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-11-24 01:18:24,610 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 78 transitions, 561 flow [2024-11-24 01:18:24,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 29.96875) internal successors, (959), 32 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:24,611 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:24,611 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:24,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-24 01:18:24,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:24,816 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:18:24,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:24,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1112756110, now seen corresponding path program 1 times [2024-11-24 01:18:24,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:24,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44374289] [2024-11-24 01:18:24,816 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:24,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:25,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44374289] [2024-11-24 01:18:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44374289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:25,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715491929] [2024-11-24 01:18:25,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:25,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:25,417 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:25,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 01:18:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:25,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-24 01:18:25,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:25,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:18:25,920 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:18:25,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 01:18:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:26,180 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-24 01:18:26,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715491929] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:26,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:26,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 6] total 25 [2024-11-24 01:18:26,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117777482] [2024-11-24 01:18:26,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:26,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-24 01:18:26,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:26,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-24 01:18:26,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2024-11-24 01:18:28,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-24 01:18:28,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 78 transitions, 561 flow. Second operand has 26 states, 26 states have (on average 27.23076923076923) internal successors, (708), 26 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:28,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:28,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-24 01:18:28,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:34,443 INFO L124 PetriNetUnfolderBase]: 12848/24305 cut-off events. [2024-11-24 01:18:34,443 INFO L125 PetriNetUnfolderBase]: For 94491/96767 co-relation queries the response was YES. [2024-11-24 01:18:34,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89124 conditions, 24305 events. 12848/24305 cut-off events. For 94491/96767 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 212397 event pairs, 3452 based on Foata normal form. 1143/25171 useless extension candidates. Maximal degree in co-relation 88923. Up to 5988 conditions per place. [2024-11-24 01:18:34,643 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 157 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-11-24 01:18:34,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 197 transitions, 1835 flow [2024-11-24 01:18:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-24 01:18:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-24 01:18:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 447 transitions. [2024-11-24 01:18:34,645 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.573076923076923 [2024-11-24 01:18:34,646 INFO L175 Difference]: Start difference. First operand has 127 places, 78 transitions, 561 flow. Second operand 13 states and 447 transitions. [2024-11-24 01:18:34,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 197 transitions, 1835 flow [2024-11-24 01:18:34,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 197 transitions, 1768 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-24 01:18:34,866 INFO L231 Difference]: Finished difference. Result has 133 places, 80 transitions, 600 flow [2024-11-24 01:18:34,866 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=600, PETRI_PLACES=133, PETRI_TRANSITIONS=80} [2024-11-24 01:18:34,867 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 73 predicate places. [2024-11-24 01:18:34,867 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 80 transitions, 600 flow [2024-11-24 01:18:34,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 27.23076923076923) internal successors, (708), 26 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:34,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:34,867 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:34,883 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 01:18:35,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:35,068 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:18:35,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash 677113900, now seen corresponding path program 2 times [2024-11-24 01:18:35,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:35,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548511886] [2024-11-24 01:18:35,069 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:35,156 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:35,156 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-24 01:18:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548511886] [2024-11-24 01:18:36,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548511886] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:18:36,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741083047] [2024-11-24 01:18:36,856 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:18:36,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:18:36,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:18:36,860 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:18:36,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 01:18:37,184 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:18:37,184 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:18:37,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-11-24 01:18:37,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:18:37,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 01:18:37,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:18:37,400 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:18:37,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-24 01:18:37,447 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-24 01:18:37,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-24 01:18:37,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:18:37,964 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 01:18:37,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 21 [2024-11-24 01:18:37,984 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-24 01:18:37,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-24 01:18:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:38,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:18:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:18:39,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741083047] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:18:39,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:18:39,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 36 [2024-11-24 01:18:39,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707130077] [2024-11-24 01:18:39,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:18:39,860 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-24 01:18:39,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:39,861 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-24 01:18:39,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2024-11-24 01:18:43,196 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-11-24 01:18:43,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 80 transitions, 600 flow. Second operand has 38 states, 38 states have (on average 22.473684210526315) internal successors, (854), 38 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:43,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:43,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-11-24 01:18:43,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:18:55,663 INFO L124 PetriNetUnfolderBase]: 33635/51069 cut-off events. [2024-11-24 01:18:55,663 INFO L125 PetriNetUnfolderBase]: For 212598/216659 co-relation queries the response was YES. [2024-11-24 01:18:55,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199993 conditions, 51069 events. 33635/51069 cut-off events. For 212598/216659 co-relation queries the response was YES. Maximal size of possible extension queue 1227. Compared 376162 event pairs, 2586 based on Foata normal form. 534/48122 useless extension candidates. Maximal degree in co-relation 199788. Up to 8891 conditions per place. [2024-11-24 01:18:56,215 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 233 selfloop transitions, 19 changer transitions 0/263 dead transitions. [2024-11-24 01:18:56,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 263 transitions, 2415 flow [2024-11-24 01:18:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-24 01:18:56,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-24 01:18:56,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 459 transitions. [2024-11-24 01:18:56,218 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.51 [2024-11-24 01:18:56,218 INFO L175 Difference]: Start difference. First operand has 133 places, 80 transitions, 600 flow. Second operand 15 states and 459 transitions. [2024-11-24 01:18:56,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 263 transitions, 2415 flow [2024-11-24 01:18:56,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 263 transitions, 2324 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-11-24 01:18:56,917 INFO L231 Difference]: Finished difference. Result has 134 places, 80 transitions, 581 flow [2024-11-24 01:18:56,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=581, PETRI_PLACES=134, PETRI_TRANSITIONS=80} [2024-11-24 01:18:56,918 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 74 predicate places. [2024-11-24 01:18:56,918 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 80 transitions, 581 flow [2024-11-24 01:18:56,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 22.473684210526315) internal successors, (854), 38 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:56,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:18:56,918 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:18:56,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-24 01:18:57,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-24 01:18:57,119 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:18:57,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:18:57,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1843121251, now seen corresponding path program 1 times [2024-11-24 01:18:57,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:18:57,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127950357] [2024-11-24 01:18:57,120 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:18:57,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:18:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:18:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-24 01:18:57,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:18:57,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127950357] [2024-11-24 01:18:57,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127950357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:18:57,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:18:57,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 01:18:57,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534233501] [2024-11-24 01:18:57,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:18:57,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 01:18:57,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:18:57,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 01:18:57,305 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-24 01:18:57,317 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-24 01:18:57,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 80 transitions, 581 flow. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:18:57,318 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:18:57,318 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-24 01:18:57,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:19:03,358 INFO L124 PetriNetUnfolderBase]: 13832/27111 cut-off events. [2024-11-24 01:19:03,358 INFO L125 PetriNetUnfolderBase]: For 107346/109827 co-relation queries the response was YES. [2024-11-24 01:19:03,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101307 conditions, 27111 events. 13832/27111 cut-off events. For 107346/109827 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 249352 event pairs, 10306 based on Foata normal form. 36/26484 useless extension candidates. Maximal degree in co-relation 101108. Up to 17266 conditions per place. [2024-11-24 01:19:03,565 INFO L140 encePairwiseOnDemand]: 57/60 looper letters, 83 selfloop transitions, 2 changer transitions 1/105 dead transitions. [2024-11-24 01:19:03,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 105 transitions, 938 flow [2024-11-24 01:19:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 01:19:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 01:19:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 133 transitions. [2024-11-24 01:19:03,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7388888888888889 [2024-11-24 01:19:03,566 INFO L175 Difference]: Start difference. First operand has 134 places, 80 transitions, 581 flow. Second operand 3 states and 133 transitions. [2024-11-24 01:19:03,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 105 transitions, 938 flow [2024-11-24 01:19:03,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 105 transitions, 905 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-24 01:19:03,879 INFO L231 Difference]: Finished difference. Result has 125 places, 80 transitions, 556 flow [2024-11-24 01:19:03,880 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=556, PETRI_PLACES=125, PETRI_TRANSITIONS=80} [2024-11-24 01:19:03,880 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2024-11-24 01:19:03,880 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 80 transitions, 556 flow [2024-11-24 01:19:03,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:03,881 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:19:03,881 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:19:03,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-24 01:19:03,881 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:19:03,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:19:03,882 INFO L85 PathProgramCache]: Analyzing trace with hash -484304734, now seen corresponding path program 2 times [2024-11-24 01:19:03,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:19:03,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522995312] [2024-11-24 01:19:03,882 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:19:03,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:19:03,915 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:19:03,919 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:19:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2024-11-24 01:19:04,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:19:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522995312] [2024-11-24 01:19:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522995312] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:19:04,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298093006] [2024-11-24 01:19:04,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:19:04,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:19:04,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:19:04,225 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:19:04,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 01:19:04,410 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:19:04,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:19:04,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-24 01:19:04,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:19:04,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:19:04,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:19:04,517 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-24 01:19:04,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-24 01:19:04,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2024-11-24 01:19:04,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:19:04,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-24 01:19:04,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2024-11-24 01:19:04,772 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-24 01:19:04,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-24 01:19:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-24 01:19:05,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:19:07,271 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-11-24 01:19:07,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298093006] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:19:07,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:19:07,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 13 [2024-11-24 01:19:07,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86944735] [2024-11-24 01:19:07,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:19:07,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-24 01:19:07,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:19:07,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-24 01:19:07,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-24 01:19:08,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-24 01:19:08,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 80 transitions, 556 flow. Second operand has 15 states, 15 states have (on average 24.4) internal successors, (366), 15 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:08,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:19:08,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-24 01:19:08,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:19:15,936 INFO L124 PetriNetUnfolderBase]: 23177/34500 cut-off events. [2024-11-24 01:19:15,936 INFO L125 PetriNetUnfolderBase]: For 129614/132012 co-relation queries the response was YES. [2024-11-24 01:19:16,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135587 conditions, 34500 events. 23177/34500 cut-off events. For 129614/132012 co-relation queries the response was YES. Maximal size of possible extension queue 920. Compared 243990 event pairs, 10850 based on Foata normal form. 366/34260 useless extension candidates. Maximal degree in co-relation 135399. Up to 17226 conditions per place. [2024-11-24 01:19:16,222 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 98 selfloop transitions, 14 changer transitions 1/126 dead transitions. [2024-11-24 01:19:16,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 126 transitions, 1135 flow [2024-11-24 01:19:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 01:19:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 01:19:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 228 transitions. [2024-11-24 01:19:16,224 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-11-24 01:19:16,224 INFO L175 Difference]: Start difference. First operand has 125 places, 80 transitions, 556 flow. Second operand 8 states and 228 transitions. [2024-11-24 01:19:16,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 126 transitions, 1135 flow [2024-11-24 01:19:16,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 126 transitions, 1119 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-24 01:19:16,441 INFO L231 Difference]: Finished difference. Result has 126 places, 80 transitions, 573 flow [2024-11-24 01:19:16,441 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=573, PETRI_PLACES=126, PETRI_TRANSITIONS=80} [2024-11-24 01:19:16,442 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2024-11-24 01:19:16,442 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 80 transitions, 573 flow [2024-11-24 01:19:16,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 24.4) internal successors, (366), 15 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:16,442 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:19:16,442 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:19:16,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-24 01:19:16,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-24 01:19:16,642 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:19:16,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:19:16,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1002280157, now seen corresponding path program 2 times [2024-11-24 01:19:16,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:19:16,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851188978] [2024-11-24 01:19:16,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:19:16,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:19:16,692 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:19:16,692 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:19:17,943 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 13 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-11-24 01:19:17,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:19:17,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851188978] [2024-11-24 01:19:17,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851188978] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:19:17,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877821848] [2024-11-24 01:19:17,944 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:19:17,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:19:17,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:19:17,946 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:19:17,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 01:19:18,229 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 01:19:18,229 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:19:18,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-24 01:19:18,236 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:19:18,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-24 01:19:18,515 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-24 01:19:18,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-24 01:19:18,803 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2024-11-24 01:19:18,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 22 [2024-11-24 01:19:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-24 01:19:19,433 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 01:19:20,439 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-24 01:19:20,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877821848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 01:19:20,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 01:19:20,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 13] total 44 [2024-11-24 01:19:20,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566805402] [2024-11-24 01:19:20,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 01:19:20,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-24 01:19:20,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:19:20,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-24 01:19:20,442 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1822, Unknown=0, NotChecked=0, Total=2070 [2024-11-24 01:19:24,287 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-11-24 01:19:24,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 80 transitions, 573 flow. Second operand has 46 states, 46 states have (on average 22.5) internal successors, (1035), 46 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:24,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:19:24,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-11-24 01:19:24,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:19:32,782 INFO L124 PetriNetUnfolderBase]: 26123/39132 cut-off events. [2024-11-24 01:19:32,783 INFO L125 PetriNetUnfolderBase]: For 171863/176788 co-relation queries the response was YES. [2024-11-24 01:19:32,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148132 conditions, 39132 events. 26123/39132 cut-off events. For 171863/176788 co-relation queries the response was YES. Maximal size of possible extension queue 1035. Compared 277796 event pairs, 576 based on Foata normal form. 884/36970 useless extension candidates. Maximal degree in co-relation 147943. Up to 6090 conditions per place. [2024-11-24 01:19:33,067 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 214 selfloop transitions, 24 changer transitions 0/252 dead transitions. [2024-11-24 01:19:33,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 252 transitions, 2286 flow [2024-11-24 01:19:33,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 01:19:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-24 01:19:33,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 562 transitions. [2024-11-24 01:19:33,070 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4683333333333333 [2024-11-24 01:19:33,070 INFO L175 Difference]: Start difference. First operand has 126 places, 80 transitions, 573 flow. Second operand 20 states and 562 transitions. [2024-11-24 01:19:33,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 252 transitions, 2286 flow [2024-11-24 01:19:33,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 252 transitions, 2154 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-24 01:19:33,433 INFO L231 Difference]: Finished difference. Result has 135 places, 80 transitions, 574 flow [2024-11-24 01:19:33,434 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=574, PETRI_PLACES=135, PETRI_TRANSITIONS=80} [2024-11-24 01:19:33,434 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2024-11-24 01:19:33,434 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 80 transitions, 574 flow [2024-11-24 01:19:33,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 22.5) internal successors, (1035), 46 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:33,435 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:19:33,435 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:19:33,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-24 01:19:33,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-24 01:19:33,636 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:19:33,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:19:33,636 INFO L85 PathProgramCache]: Analyzing trace with hash 246636578, now seen corresponding path program 1 times [2024-11-24 01:19:33,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:19:33,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414499488] [2024-11-24 01:19:33,636 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:19:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:19:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:19:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-11-24 01:19:33,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:19:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414499488] [2024-11-24 01:19:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414499488] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 01:19:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303912084] [2024-11-24 01:19:33,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 01:19:33,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 01:19:33,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 01:19:33,927 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 01:19:33,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 01:19:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 01:19:34,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 01:19:34,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 01:19:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-24 01:19:34,276 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-24 01:19:34,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303912084] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:19:34,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-24 01:19:34,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 9 [2024-11-24 01:19:34,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230918803] [2024-11-24 01:19:34,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:19:34,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:19:34,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:19:34,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:19:34,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-24 01:19:34,308 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-24 01:19:34,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 80 transitions, 574 flow. Second operand has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:34,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:19:34,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-24 01:19:34,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 01:19:39,376 INFO L124 PetriNetUnfolderBase]: 14135/26918 cut-off events. [2024-11-24 01:19:39,376 INFO L125 PetriNetUnfolderBase]: For 109898/112948 co-relation queries the response was YES. [2024-11-24 01:19:39,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94875 conditions, 26918 events. 14135/26918 cut-off events. For 109898/112948 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 241542 event pairs, 10966 based on Foata normal form. 5/26362 useless extension candidates. Maximal degree in co-relation 94677. Up to 17573 conditions per place. [2024-11-24 01:19:39,924 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 91 selfloop transitions, 5 changer transitions 1/116 dead transitions. [2024-11-24 01:19:39,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 116 transitions, 1012 flow [2024-11-24 01:19:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 01:19:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 01:19:39,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 170 transitions. [2024-11-24 01:19:39,925 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-11-24 01:19:39,925 INFO L175 Difference]: Start difference. First operand has 135 places, 80 transitions, 574 flow. Second operand 4 states and 170 transitions. [2024-11-24 01:19:39,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 116 transitions, 1012 flow [2024-11-24 01:19:40,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 116 transitions, 947 flow, removed 2 selfloop flow, removed 18 redundant places. [2024-11-24 01:19:40,243 INFO L231 Difference]: Finished difference. Result has 122 places, 83 transitions, 575 flow [2024-11-24 01:19:40,243 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=526, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=575, PETRI_PLACES=122, PETRI_TRANSITIONS=83} [2024-11-24 01:19:40,244 INFO L279 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-11-24 01:19:40,244 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 83 transitions, 575 flow [2024-11-24 01:19:40,244 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:40,244 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 01:19:40,244 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 01:19:40,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 01:19:40,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4620a6d-c35c-437a-854f-34032939317a/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-24 01:19:40,445 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-24 01:19:40,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 01:19:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2025529368, now seen corresponding path program 2 times [2024-11-24 01:19:40,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 01:19:40,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537212010] [2024-11-24 01:19:40,446 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 01:19:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 01:19:40,471 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 01:19:40,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 01:19:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-11-24 01:19:40,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 01:19:40,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537212010] [2024-11-24 01:19:40,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537212010] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 01:19:40,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 01:19:40,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 01:19:40,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056983250] [2024-11-24 01:19:40,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 01:19:40,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 01:19:40,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 01:19:40,709 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 01:19:40,709 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-24 01:19:40,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 60 [2024-11-24 01:19:40,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 83 transitions, 575 flow. Second operand has 6 states, 6 states have (on average 33.5) internal successors, (201), 6 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 01:19:40,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 01:19:40,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 60 [2024-11-24 01:19:40,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand