./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB --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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:49:20,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:49:20,878 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 19:49:20,883 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:49:20,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:49:20,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:49:20,910 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:49:20,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:49:20,911 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:49:20,911 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:49:20,913 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:49:20,913 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:49:20,913 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:49:20,913 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:49:20,913 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:49:20,914 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:49:20,914 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:49:20,915 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:20,915 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:49:20,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:20,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:49:20,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:49:20,916 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 19:49:20,916 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 19:49:20,917 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:49:20,917 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:49:20,918 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:49:20,918 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:49:20,918 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_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB 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 -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-11-27 19:49:21,241 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:49:21,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:49:21,259 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:49:21,260 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:49:21,260 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:49:21,263 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-27 19:49:24,250 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/a04b7e901/55f359ef4e5448f4b1352f26dd29ab00/FLAGb4585ecb6 [2024-11-27 19:49:24,569 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:49:24,569 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-27 19:49:24,583 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/a04b7e901/55f359ef4e5448f4b1352f26dd29ab00/FLAGb4585ecb6 [2024-11-27 19:49:24,820 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/a04b7e901/55f359ef4e5448f4b1352f26dd29ab00 [2024-11-27 19:49:24,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:49:24,824 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:49:24,825 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:49:24,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:49:24,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:49:24,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@671be122 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:24, skipping insertion in model container [2024-11-27 19:49:24,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:49:24" (1/1) ... [2024-11-27 19:49:24,860 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:49:25,117 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 19:49:25,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:49:25,139 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:49:25,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:49:25,209 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:49:25,209 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25 WrapperNode [2024-11-27 19:49:25,210 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:49:25,211 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:49:25,211 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:49:25,211 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:49:25,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,232 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,271 INFO L138 Inliner]: procedures = 24, calls = 47, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 308 [2024-11-27 19:49:25,271 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:49:25,272 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:49:25,272 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:49:25,272 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:49:25,282 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,291 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,321 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2024-11-27 19:49:25,324 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,324 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,337 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,338 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,343 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,345 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,346 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,350 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:49:25,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:49:25,354 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:49:25,355 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:49:25,356 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (1/1) ... [2024-11-27 19:49:25,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:49:25,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:25,397 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:49:25,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:49:25,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:49:25,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:49:25,432 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:49:25,432 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:49:25,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 19:49:25,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 19:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 19:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 19:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 19:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 19:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 19:49:25,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 19:49:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 19:49:25,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:49:25,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:49:25,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 19:49:25,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 19:49:25,437 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:49:25,596 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:49:25,599 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:49:26,449 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:49:26,449 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:49:27,091 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:49:27,092 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-27 19:49:27,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:49:27 BoogieIcfgContainer [2024-11-27 19:49:27,093 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:49:27,096 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:49:27,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:49:27,102 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:49:27,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:49:24" (1/3) ... [2024-11-27 19:49:27,103 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c23912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:49:27, skipping insertion in model container [2024-11-27 19:49:27,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:49:25" (2/3) ... [2024-11-27 19:49:27,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c23912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:49:27, skipping insertion in model container [2024-11-27 19:49:27,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:49:27" (3/3) ... [2024-11-27 19:49:27,105 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-11-27 19:49:27,122 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:49:27,124 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-ring.wvr.c that has 4 procedures, 64 locations, 1 initial locations, 6 loop locations, and 22 error locations. [2024-11-27 19:49:27,124 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:49:27,279 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 19:49:27,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 167 flow [2024-11-27 19:49:27,401 INFO L124 PetriNetUnfolderBase]: 10/70 cut-off events. [2024-11-27 19:49:27,403 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:49:27,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 70 events. 10/70 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 183 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 51. Up to 3 conditions per place. [2024-11-27 19:49:27,410 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 73 transitions, 167 flow [2024-11-27 19:49:27,416 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 69 transitions, 156 flow [2024-11-27 19:49:27,430 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:49:27,448 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;@3e41eccc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:49:27,448 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-27 19:49:27,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:49:27,454 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 19:49:27,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 19:49:27,454 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:27,455 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 19:49:27,455 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:27,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:27,461 INFO L85 PathProgramCache]: Analyzing trace with hash 942232, now seen corresponding path program 1 times [2024-11-27 19:49:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448193020] [2024-11-27 19:49:27,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:27,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:27,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:27,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448193020] [2024-11-27 19:49:27,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448193020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:27,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:27,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 19:49:27,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716124270] [2024-11-27 19:49:27,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:27,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:49:27,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:27,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:49:27,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:49:27,890 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:27,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:27,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:27,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:29,771 INFO L124 PetriNetUnfolderBase]: 5733/8828 cut-off events. [2024-11-27 19:49:29,772 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2024-11-27 19:49:29,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17072 conditions, 8828 events. 5733/8828 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54896 event pairs, 5236 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 16460. Up to 7878 conditions per place. [2024-11-27 19:49:29,847 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 47 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-27 19:49:29,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 236 flow [2024-11-27 19:49:29,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:49:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:49:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-11-27 19:49:29,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4657534246575342 [2024-11-27 19:49:29,863 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 156 flow. Second operand 3 states and 102 transitions. [2024-11-27 19:49:29,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 236 flow [2024-11-27 19:49:29,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 19:49:29,884 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 130 flow [2024-11-27 19:49:29,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-11-27 19:49:29,893 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2024-11-27 19:49:29,893 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 130 flow [2024-11-27 19:49:29,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:29,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:29,894 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 19:49:29,894 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 19:49:29,894 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:29,895 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash 942233, now seen corresponding path program 1 times [2024-11-27 19:49:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:29,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962404161] [2024-11-27 19:49:29,895 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:29,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:30,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:30,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962404161] [2024-11-27 19:49:30,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962404161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:30,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:30,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:49:30,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293086045] [2024-11-27 19:49:30,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:30,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:30,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:30,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:30,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:30,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:30,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:30,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:30,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:30,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:31,917 INFO L124 PetriNetUnfolderBase]: 5734/8831 cut-off events. [2024-11-27 19:49:31,917 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-27 19:49:31,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16859 conditions, 8831 events. 5734/8831 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54902 event pairs, 5236 based on Foata normal form. 0/5198 useless extension candidates. Maximal degree in co-relation 16822. Up to 7891 conditions per place. [2024-11-27 19:49:31,984 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-27 19:49:31,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 63 transitions, 246 flow [2024-11-27 19:49:31,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:31,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:49:31,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-27 19:49:31,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3972602739726027 [2024-11-27 19:49:31,987 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 130 flow. Second operand 4 states and 116 transitions. [2024-11-27 19:49:31,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 63 transitions, 246 flow [2024-11-27 19:49:31,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 242 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:31,991 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 153 flow [2024-11-27 19:49:31,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-27 19:49:31,992 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2024-11-27 19:49:31,992 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 153 flow [2024-11-27 19:49:31,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:31,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:31,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-27 19:49:31,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 19:49:31,993 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:31,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:31,993 INFO L85 PathProgramCache]: Analyzing trace with hash 29211780, now seen corresponding path program 1 times [2024-11-27 19:49:31,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:31,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005035611] [2024-11-27 19:49:31,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:31,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:32,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:32,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005035611] [2024-11-27 19:49:32,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005035611] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:32,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:32,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747568421] [2024-11-27 19:49:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:32,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:49:32,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:32,365 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:49:32,365 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:49:32,411 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:32,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:32,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:32,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:32,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:33,639 INFO L124 PetriNetUnfolderBase]: 5735/8834 cut-off events. [2024-11-27 19:49:33,639 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-27 19:49:33,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16876 conditions, 8834 events. 5735/8834 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54871 event pairs, 5236 based on Foata normal form. 0/5200 useless extension candidates. Maximal degree in co-relation 16851. Up to 7890 conditions per place. [2024-11-27 19:49:33,691 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 51 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-27 19:49:33,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 275 flow [2024-11-27 19:49:33,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-11-27 19:49:33,696 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36712328767123287 [2024-11-27 19:49:33,696 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 153 flow. Second operand 5 states and 134 transitions. [2024-11-27 19:49:33,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 275 flow [2024-11-27 19:49:33,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:33,700 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 187 flow [2024-11-27 19:49:33,700 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-11-27 19:49:33,701 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2024-11-27 19:49:33,701 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 187 flow [2024-11-27 19:49:33,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:33,702 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:33,702 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 19:49:33,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 19:49:33,703 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:33,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:33,704 INFO L85 PathProgramCache]: Analyzing trace with hash 905517118, now seen corresponding path program 1 times [2024-11-27 19:49:33,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:33,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87550995] [2024-11-27 19:49:33,704 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:33,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87550995] [2024-11-27 19:49:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87550995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:34,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240199681] [2024-11-27 19:49:34,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:34,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:34,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:34,133 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:34,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:49:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:34,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-27 19:49:34,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:34,347 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 10 treesize of output 9 [2024-11-27 19:49:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:34,674 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240199681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:34,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-27 19:49:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145570078] [2024-11-27 19:49:34,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:34,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 19:49:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:34,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 19:49:34,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-27 19:49:34,981 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:34,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 187 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:34,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:34,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:34,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:36,991 INFO L124 PetriNetUnfolderBase]: 5736/8836 cut-off events. [2024-11-27 19:49:36,991 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-27 19:49:37,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16899 conditions, 8836 events. 5736/8836 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54953 event pairs, 5236 based on Foata normal form. 0/5205 useless extension candidates. Maximal degree in co-relation 16861. Up to 7891 conditions per place. [2024-11-27 19:49:37,051 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 50 selfloop transitions, 10 changer transitions 0/68 dead transitions. [2024-11-27 19:49:37,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 318 flow [2024-11-27 19:49:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-27 19:49:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-27 19:49:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-11-27 19:49:37,053 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3065068493150685 [2024-11-27 19:49:37,053 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 187 flow. Second operand 8 states and 179 transitions. [2024-11-27 19:49:37,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 318 flow [2024-11-27 19:49:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 317 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:37,056 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 217 flow [2024-11-27 19:49:37,056 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=217, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-27 19:49:37,057 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2024-11-27 19:49:37,057 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 217 flow [2024-11-27 19:49:37,057 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:37,057 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:37,058 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-27 19:49:37,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 19:49:37,259 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:37,259 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:37,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash 905565976, now seen corresponding path program 1 times [2024-11-27 19:49:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:37,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593906245] [2024-11-27 19:49:37,260 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:37,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:37,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:37,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593906245] [2024-11-27 19:49:37,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593906245] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:37,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:37,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052911078] [2024-11-27 19:49:37,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:37,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:49:37,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:37,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:49:37,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:49:37,626 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:37,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:37,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:37,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:37,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:38,763 INFO L124 PetriNetUnfolderBase]: 5737/8839 cut-off events. [2024-11-27 19:49:38,763 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-27 19:49:38,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16915 conditions, 8839 events. 5737/8839 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54988 event pairs, 5236 based on Foata normal form. 0/5207 useless extension candidates. Maximal degree in co-relation 16869. Up to 7895 conditions per place. [2024-11-27 19:49:38,825 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 54 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-11-27 19:49:38,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 349 flow [2024-11-27 19:49:38,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-11-27 19:49:38,827 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3643835616438356 [2024-11-27 19:49:38,828 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 217 flow. Second operand 5 states and 133 transitions. [2024-11-27 19:49:38,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 349 flow [2024-11-27 19:49:38,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 302 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-27 19:49:38,831 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 213 flow [2024-11-27 19:49:38,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=213, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2024-11-27 19:49:38,832 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-27 19:49:38,832 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 213 flow [2024-11-27 19:49:38,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:38,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:38,833 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-27 19:49:38,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 19:49:38,833 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:38,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1992220438, now seen corresponding path program 1 times [2024-11-27 19:49:38,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:38,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793859697] [2024-11-27 19:49:38,835 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:38,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:38,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:39,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:39,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793859697] [2024-11-27 19:49:39,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793859697] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:39,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333166220] [2024-11-27 19:49:39,155 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:39,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:39,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:39,159 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:39,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:49:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:39,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:49:39,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:39,295 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 [2024-11-27 19:49:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:39,487 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:39,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:39,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333166220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:39,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:39,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-27 19:49:39,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538410543] [2024-11-27 19:49:39,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:39,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 19:49:39,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:39,715 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 19:49:39,716 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-27 19:49:39,970 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:39,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:39,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:39,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:39,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:41,295 INFO L124 PetriNetUnfolderBase]: 5737/8838 cut-off events. [2024-11-27 19:49:41,295 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-27 19:49:41,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16907 conditions, 8838 events. 5737/8838 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54997 event pairs, 5236 based on Foata normal form. 0/5209 useless extension candidates. Maximal degree in co-relation 16858. Up to 7885 conditions per place. [2024-11-27 19:49:41,353 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-11-27 19:49:41,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 333 flow [2024-11-27 19:49:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:49:41,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:49:41,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-11-27 19:49:41,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31702544031311153 [2024-11-27 19:49:41,356 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 213 flow. Second operand 7 states and 162 transitions. [2024-11-27 19:49:41,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 333 flow [2024-11-27 19:49:41,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 70 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:41,360 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 232 flow [2024-11-27 19:49:41,362 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=232, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2024-11-27 19:49:41,363 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 5 predicate places. [2024-11-27 19:49:41,363 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 232 flow [2024-11-27 19:49:41,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.307692307692307) internal successors, (212), 13 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:41,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:41,363 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-27 19:49:41,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 19:49:41,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:41,564 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:41,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1629428061, now seen corresponding path program 1 times [2024-11-27 19:49:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:41,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887088518] [2024-11-27 19:49:41,564 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:41,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:41,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:41,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887088518] [2024-11-27 19:49:41,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887088518] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:41,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598355054] [2024-11-27 19:49:41,914 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:41,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:41,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:41,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:41,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:49:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:42,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-27 19:49:42,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:42,042 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 10 treesize of output 9 [2024-11-27 19:49:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:42,265 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:42,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598355054] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:42,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:42,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-27 19:49:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295964143] [2024-11-27 19:49:42,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:42,566 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-27 19:49:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:42,567 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-27 19:49:42,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-27 19:49:42,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:42,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 232 flow. Second operand has 13 states, 13 states have (on average 16.46153846153846) internal successors, (214), 13 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:42,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:42,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:42,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:43,943 INFO L124 PetriNetUnfolderBase]: 5737/8837 cut-off events. [2024-11-27 19:49:43,943 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-27 19:49:43,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16915 conditions, 8837 events. 5737/8837 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 54999 event pairs, 5236 based on Foata normal form. 0/5209 useless extension candidates. Maximal degree in co-relation 16860. Up to 7885 conditions per place. [2024-11-27 19:49:43,993 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 43 selfloop transitions, 18 changer transitions 0/69 dead transitions. [2024-11-27 19:49:43,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 69 transitions, 350 flow [2024-11-27 19:49:43,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:49:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:49:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-11-27 19:49:43,998 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3150684931506849 [2024-11-27 19:49:43,998 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 232 flow. Second operand 7 states and 161 transitions. [2024-11-27 19:49:43,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 69 transitions, 350 flow [2024-11-27 19:49:43,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 69 transitions, 323 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-27 19:49:44,004 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 237 flow [2024-11-27 19:49:44,004 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=237, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2024-11-27 19:49:44,005 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 5 predicate places. [2024-11-27 19:49:44,005 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 237 flow [2024-11-27 19:49:44,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.46153846153846) internal successors, (214), 13 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:44,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:44,006 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:44,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-27 19:49:44,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:44,206 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:44,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:44,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1030690775, now seen corresponding path program 1 times [2024-11-27 19:49:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893854162] [2024-11-27 19:49:44,208 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:49:44,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893854162] [2024-11-27 19:49:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893854162] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:44,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:44,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:49:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831779987] [2024-11-27 19:49:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:44,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:44,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:44,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:44,315 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:44,327 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:44,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 237 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:44,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:44,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:44,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:45,156 INFO L124 PetriNetUnfolderBase]: 5939/9200 cut-off events. [2024-11-27 19:49:45,156 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-27 19:49:45,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17639 conditions, 9200 events. 5939/9200 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 57191 event pairs, 5423 based on Foata normal form. 143/5653 useless extension candidates. Maximal degree in co-relation 16872. Up to 7896 conditions per place. [2024-11-27 19:49:45,214 INFO L140 encePairwiseOnDemand]: 57/73 looper letters, 82 selfloop transitions, 7 changer transitions 1/98 dead transitions. [2024-11-27 19:49:45,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 98 transitions, 524 flow [2024-11-27 19:49:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-27 19:49:45,216 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2024-11-27 19:49:45,216 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 237 flow. Second operand 5 states and 180 transitions. [2024-11-27 19:49:45,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 98 transitions, 524 flow [2024-11-27 19:49:45,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 98 transitions, 466 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-27 19:49:45,220 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 266 flow [2024-11-27 19:49:45,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-11-27 19:49:45,221 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 5 predicate places. [2024-11-27 19:49:45,221 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 266 flow [2024-11-27 19:49:45,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:45,221 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:45,221 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:45,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-27 19:49:45,222 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:45,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:45,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1976672431, now seen corresponding path program 1 times [2024-11-27 19:49:45,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:45,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792939421] [2024-11-27 19:49:45,223 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:45,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:49:45,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:45,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792939421] [2024-11-27 19:49:45,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792939421] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:45,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:45,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:49:45,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320067197] [2024-11-27 19:49:45,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:45,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:45,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:45,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:45,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:45,495 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:45,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:45,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:45,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:45,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:46,286 INFO L124 PetriNetUnfolderBase]: 4591/7251 cut-off events. [2024-11-27 19:49:46,287 INFO L125 PetriNetUnfolderBase]: For 577/577 co-relation queries the response was YES. [2024-11-27 19:49:46,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14813 conditions, 7251 events. 4591/7251 cut-off events. For 577/577 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44070 event pairs, 4099 based on Foata normal form. 0/4719 useless extension candidates. Maximal degree in co-relation 14073. Up to 6256 conditions per place. [2024-11-27 19:49:46,330 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 55 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-27 19:49:46,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 378 flow [2024-11-27 19:49:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:46,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-27 19:49:46,332 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33972602739726027 [2024-11-27 19:49:46,332 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 266 flow. Second operand 5 states and 124 transitions. [2024-11-27 19:49:46,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 378 flow [2024-11-27 19:49:46,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 70 transitions, 373 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:46,336 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 263 flow [2024-11-27 19:49:46,337 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=263, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-11-27 19:49:46,337 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2024-11-27 19:49:46,337 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 263 flow [2024-11-27 19:49:46,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:46,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:46,338 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:46,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-27 19:49:46,338 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:46,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1976672430, now seen corresponding path program 1 times [2024-11-27 19:49:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118113414] [2024-11-27 19:49:46,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:46,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:49:46,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118113414] [2024-11-27 19:49:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118113414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:46,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410059080] [2024-11-27 19:49:46,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:46,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:46,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:46,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:46,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:49:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:46,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 19:49:46,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:46,839 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 [2024-11-27 19:49:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:49:46,900 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 18 treesize of output 13 [2024-11-27 19:49:46,926 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-27 19:49:46,926 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 [2024-11-27 19:49:46,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:49:46,949 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 18 treesize of output 13 [2024-11-27 19:49:46,960 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 19:49:46,960 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 [2024-11-27 19:49:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:49:46,990 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:49:46,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410059080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:46,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:49:46,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-27 19:49:46,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163169029] [2024-11-27 19:49:46,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:46,990 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 19:49:46,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:46,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 19:49:46,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:49:47,035 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:47,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:47,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:47,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:47,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:47,493 INFO L124 PetriNetUnfolderBase]: 3361/5360 cut-off events. [2024-11-27 19:49:47,493 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2024-11-27 19:49:47,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10599 conditions, 5360 events. 3361/5360 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30809 event pairs, 2963 based on Foata normal form. 0/3796 useless extension candidates. Maximal degree in co-relation 9811. Up to 4610 conditions per place. [2024-11-27 19:49:47,519 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-27 19:49:47,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 369 flow [2024-11-27 19:49:47,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:47,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:49:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-27 19:49:47,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.363013698630137 [2024-11-27 19:49:47,522 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 263 flow. Second operand 4 states and 106 transitions. [2024-11-27 19:49:47,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 369 flow [2024-11-27 19:49:47,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 67 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:49:47,525 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 248 flow [2024-11-27 19:49:47,526 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-11-27 19:49:47,528 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2024-11-27 19:49:47,528 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 248 flow [2024-11-27 19:49:47,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:47,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:47,528 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:47,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 19:49:47,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:47,729 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:47,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1147302190, now seen corresponding path program 1 times [2024-11-27 19:49:47,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701772457] [2024-11-27 19:49:47,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:47,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:47,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701772457] [2024-11-27 19:49:47,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701772457] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:47,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:47,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:49:47,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939563518] [2024-11-27 19:49:47,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:47,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:49:47,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:47,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:49:47,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:49:47,810 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:47,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:47,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:47,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:47,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:48,565 INFO L124 PetriNetUnfolderBase]: 4097/6448 cut-off events. [2024-11-27 19:49:48,565 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2024-11-27 19:49:48,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13148 conditions, 6448 events. 4097/6448 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38187 event pairs, 1846 based on Foata normal form. 114/4591 useless extension candidates. Maximal degree in co-relation 12038. Up to 3446 conditions per place. [2024-11-27 19:49:48,590 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 77 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-27 19:49:48,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 454 flow [2024-11-27 19:49:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:49:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:49:48,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-11-27 19:49:48,591 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2024-11-27 19:49:48,591 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 248 flow. Second operand 3 states and 120 transitions. [2024-11-27 19:49:48,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 454 flow [2024-11-27 19:49:48,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 87 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:48,595 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 259 flow [2024-11-27 19:49:48,595 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=259, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-27 19:49:48,596 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-27 19:49:48,596 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 259 flow [2024-11-27 19:49:48,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:48,596 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:48,596 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:48,596 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-27 19:49:48,597 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:48,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash -865070799, now seen corresponding path program 1 times [2024-11-27 19:49:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:48,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296749085] [2024-11-27 19:49:48,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:48,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:49:48,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:48,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296749085] [2024-11-27 19:49:48,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296749085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:48,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:48,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:49:48,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825378190] [2024-11-27 19:49:48,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:48,664 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:49:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:48,665 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:49:48,665 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:49:48,665 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:48,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:48,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:48,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:48,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:49,212 INFO L124 PetriNetUnfolderBase]: 3232/5010 cut-off events. [2024-11-27 19:49:49,212 INFO L125 PetriNetUnfolderBase]: For 774/774 co-relation queries the response was YES. [2024-11-27 19:49:49,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10926 conditions, 5010 events. 3232/5010 cut-off events. For 774/774 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 28514 event pairs, 1349 based on Foata normal form. 77/3663 useless extension candidates. Maximal degree in co-relation 10643. Up to 4054 conditions per place. [2024-11-27 19:49:49,232 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 67 selfloop transitions, 2 changer transitions 5/82 dead transitions. [2024-11-27 19:49:49,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 82 transitions, 443 flow [2024-11-27 19:49:49,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:49:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:49:49,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-27 19:49:49,234 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-27 19:49:49,234 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 259 flow. Second operand 3 states and 114 transitions. [2024-11-27 19:49:49,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 82 transitions, 443 flow [2024-11-27 19:49:49,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 82 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:49,236 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 234 flow [2024-11-27 19:49:49,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-11-27 19:49:49,236 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2024-11-27 19:49:49,236 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 234 flow [2024-11-27 19:49:49,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:49,237 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:49,237 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:49,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-27 19:49:49,237 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:49,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:49,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1253451037, now seen corresponding path program 1 times [2024-11-27 19:49:49,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:49,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568183528] [2024-11-27 19:49:49,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:49,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:49,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:49,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568183528] [2024-11-27 19:49:49,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568183528] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:49,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:49,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:49,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726234232] [2024-11-27 19:49:49,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:49,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:49:49,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:49,312 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:49:49,312 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:49:49,312 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:49,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:49,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:49,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:49,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:49,670 INFO L124 PetriNetUnfolderBase]: 2197/3478 cut-off events. [2024-11-27 19:49:49,671 INFO L125 PetriNetUnfolderBase]: For 691/691 co-relation queries the response was YES. [2024-11-27 19:49:49,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8086 conditions, 3478 events. 2197/3478 cut-off events. For 691/691 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 19735 event pairs, 1219 based on Foata normal form. 18/2616 useless extension candidates. Maximal degree in co-relation 8041. Up to 3137 conditions per place. [2024-11-27 19:49:49,681 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 63 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2024-11-27 19:49:49,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 74 transitions, 392 flow [2024-11-27 19:49:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:49:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:49:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-27 19:49:49,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2024-11-27 19:49:49,683 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 234 flow. Second operand 3 states and 108 transitions. [2024-11-27 19:49:49,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 74 transitions, 392 flow [2024-11-27 19:49:49,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 74 transitions, 382 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:49,685 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 247 flow [2024-11-27 19:49:49,686 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=247, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-11-27 19:49:49,686 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-27 19:49:49,686 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 247 flow [2024-11-27 19:49:49,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:49,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:49,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:49,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-27 19:49:49,687 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:49,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:49,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1921581485, now seen corresponding path program 1 times [2024-11-27 19:49:49,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:49,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133715864] [2024-11-27 19:49:49,688 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:49,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:49,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:49,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:49,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133715864] [2024-11-27 19:49:49,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133715864] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:49,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:49,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:49,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332743287] [2024-11-27 19:49:49,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:49,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:49,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:49,807 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:49,807 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:49,817 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:49,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:49,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:49,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:49,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:50,249 INFO L124 PetriNetUnfolderBase]: 2336/3732 cut-off events. [2024-11-27 19:49:50,250 INFO L125 PetriNetUnfolderBase]: For 1464/1464 co-relation queries the response was YES. [2024-11-27 19:49:50,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9111 conditions, 3732 events. 2336/3732 cut-off events. For 1464/1464 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 21060 event pairs, 1929 based on Foata normal form. 40/2888 useless extension candidates. Maximal degree in co-relation 9065. Up to 3243 conditions per place. [2024-11-27 19:49:50,261 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 54 selfloop transitions, 3 changer transitions 22/87 dead transitions. [2024-11-27 19:49:50,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 87 transitions, 477 flow [2024-11-27 19:49:50,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-27 19:49:50,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4383561643835616 [2024-11-27 19:49:50,262 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 247 flow. Second operand 5 states and 160 transitions. [2024-11-27 19:49:50,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 87 transitions, 477 flow [2024-11-27 19:49:50,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 456 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:50,265 INFO L231 Difference]: Finished difference. Result has 76 places, 65 transitions, 245 flow [2024-11-27 19:49:50,266 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=76, PETRI_TRANSITIONS=65} [2024-11-27 19:49:50,266 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-27 19:49:50,266 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 65 transitions, 245 flow [2024-11-27 19:49:50,266 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:50,266 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:50,266 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:50,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-27 19:49:50,266 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:50,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:50,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1382740217, now seen corresponding path program 1 times [2024-11-27 19:49:50,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:50,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465453580] [2024-11-27 19:49:50,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:50,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:50,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465453580] [2024-11-27 19:49:50,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465453580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777917997] [2024-11-27 19:49:50,548 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:50,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:50,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:50,551 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:50,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:49:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:50,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 19:49:50,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:50,670 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 [2024-11-27 19:49:50,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:49:50,736 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 18 treesize of output 13 [2024-11-27 19:49:50,744 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 19:49:50,744 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 [2024-11-27 19:49:50,804 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:50,804 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:49:50,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777917997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:50,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:49:50,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-27 19:49:50,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007692041] [2024-11-27 19:49:50,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:50,805 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:49:50,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:50,806 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:49:50,806 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:49:50,841 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:50,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 65 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:50,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:50,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:50,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:51,202 INFO L124 PetriNetUnfolderBase]: 1554/2500 cut-off events. [2024-11-27 19:49:51,202 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2024-11-27 19:49:51,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5986 conditions, 2500 events. 1554/2500 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13644 event pairs, 1234 based on Foata normal form. 0/2065 useless extension candidates. Maximal degree in co-relation 5937. Up to 2298 conditions per place. [2024-11-27 19:49:51,210 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 52 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-11-27 19:49:51,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 347 flow [2024-11-27 19:49:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:51,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:49:51,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-27 19:49:51,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3527397260273973 [2024-11-27 19:49:51,211 INFO L175 Difference]: Start difference. First operand has 76 places, 65 transitions, 245 flow. Second operand 4 states and 103 transitions. [2024-11-27 19:49:51,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 347 flow [2024-11-27 19:49:51,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 63 transitions, 336 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-27 19:49:51,213 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 232 flow [2024-11-27 19:49:51,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=69, 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=4, PETRI_FLOW=232, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-27 19:49:51,214 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-27 19:49:51,214 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 232 flow [2024-11-27 19:49:51,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:51,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:51,214 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:51,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 19:49:51,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:51,418 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:51,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1382740218, now seen corresponding path program 1 times [2024-11-27 19:49:51,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:51,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747707935] [2024-11-27 19:49:51,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:51,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:51,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-27 19:49:51,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:51,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747707935] [2024-11-27 19:49:51,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747707935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:51,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:51,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:51,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422213638] [2024-11-27 19:49:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:51,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:51,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:51,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:51,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:51,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:51,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:51,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:51,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:51,816 INFO L124 PetriNetUnfolderBase]: 1022/1685 cut-off events. [2024-11-27 19:49:51,817 INFO L125 PetriNetUnfolderBase]: For 439/439 co-relation queries the response was YES. [2024-11-27 19:49:51,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 1685 events. 1022/1685 cut-off events. For 439/439 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8788 event pairs, 779 based on Foata normal form. 146/1589 useless extension candidates. Maximal degree in co-relation 3864. Up to 1517 conditions per place. [2024-11-27 19:49:51,823 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 49 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-27 19:49:51,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 332 flow [2024-11-27 19:49:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-27 19:49:51,824 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3178082191780822 [2024-11-27 19:49:51,824 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 232 flow. Second operand 5 states and 116 transitions. [2024-11-27 19:49:51,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 332 flow [2024-11-27 19:49:51,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 61 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:51,826 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 229 flow [2024-11-27 19:49:51,826 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=229, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2024-11-27 19:49:51,826 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-27 19:49:51,826 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 229 flow [2024-11-27 19:49:51,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:51,826 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:51,827 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:51,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-27 19:49:51,827 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:51,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:51,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1466837847, now seen corresponding path program 1 times [2024-11-27 19:49:51,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:51,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535540136] [2024-11-27 19:49:51,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:51,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:51,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 19:49:51,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:51,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535540136] [2024-11-27 19:49:51,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535540136] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:51,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:51,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:51,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331159833] [2024-11-27 19:49:51,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:51,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:51,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:51,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:51,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:51,964 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:51,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:51,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:51,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:51,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:52,264 INFO L124 PetriNetUnfolderBase]: 1301/2213 cut-off events. [2024-11-27 19:49:52,264 INFO L125 PetriNetUnfolderBase]: For 540/540 co-relation queries the response was YES. [2024-11-27 19:49:52,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5090 conditions, 2213 events. 1301/2213 cut-off events. For 540/540 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12011 event pairs, 1032 based on Foata normal form. 44/1981 useless extension candidates. Maximal degree in co-relation 5042. Up to 1533 conditions per place. [2024-11-27 19:49:52,272 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 50 selfloop transitions, 2 changer transitions 21/81 dead transitions. [2024-11-27 19:49:52,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 432 flow [2024-11-27 19:49:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:49:52,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-27 19:49:52,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4657534246575342 [2024-11-27 19:49:52,274 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 229 flow. Second operand 4 states and 136 transitions. [2024-11-27 19:49:52,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 432 flow [2024-11-27 19:49:52,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 426 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:49:52,276 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 228 flow [2024-11-27 19:49:52,276 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-11-27 19:49:52,277 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2024-11-27 19:49:52,277 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 228 flow [2024-11-27 19:49:52,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:52,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:52,277 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:52,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-27 19:49:52,278 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:52,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash -882709826, now seen corresponding path program 1 times [2024-11-27 19:49:52,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:52,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272442440] [2024-11-27 19:49:52,278 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:52,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 19:49:52,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:52,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272442440] [2024-11-27 19:49:52,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272442440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:52,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:52,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:49:52,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223955632] [2024-11-27 19:49:52,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:52,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:49:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:52,569 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:49:52,569 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:49:52,590 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:52,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 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) [2024-11-27 19:49:52,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:52,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:52,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:52,794 INFO L124 PetriNetUnfolderBase]: 794/1353 cut-off events. [2024-11-27 19:49:52,794 INFO L125 PetriNetUnfolderBase]: For 398/398 co-relation queries the response was YES. [2024-11-27 19:49:52,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3216 conditions, 1353 events. 794/1353 cut-off events. For 398/398 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6780 event pairs, 602 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 3168. Up to 1191 conditions per place. [2024-11-27 19:49:52,798 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 48 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-27 19:49:52,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 58 transitions, 320 flow [2024-11-27 19:49:52,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:49:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-11-27 19:49:52,799 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3801369863013699 [2024-11-27 19:49:52,799 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 228 flow. Second operand 4 states and 111 transitions. [2024-11-27 19:49:52,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 58 transitions, 320 flow [2024-11-27 19:49:52,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 58 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:52,801 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 218 flow [2024-11-27 19:49:52,801 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-11-27 19:49:52,802 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-27 19:49:52,802 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 218 flow [2024-11-27 19:49:52,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 5 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) [2024-11-27 19:49:52,802 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:52,802 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:52,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-27 19:49:52,802 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:52,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:52,803 INFO L85 PathProgramCache]: Analyzing trace with hash -882709827, now seen corresponding path program 1 times [2024-11-27 19:49:52,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:52,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83087232] [2024-11-27 19:49:52,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:52,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:52,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:52,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 19:49:52,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:52,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83087232] [2024-11-27 19:49:52,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83087232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:52,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:52,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:52,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409776056] [2024-11-27 19:49:52,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:52,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:52,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:52,889 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:52,889 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:52,906 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:52,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 218 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:52,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:52,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:52,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:53,082 INFO L124 PetriNetUnfolderBase]: 597/1064 cut-off events. [2024-11-27 19:49:53,083 INFO L125 PetriNetUnfolderBase]: For 267/267 co-relation queries the response was YES. [2024-11-27 19:49:53,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2444 conditions, 1064 events. 597/1064 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5069 event pairs, 451 based on Foata normal form. 62/1042 useless extension candidates. Maximal degree in co-relation 2397. Up to 908 conditions per place. [2024-11-27 19:49:53,087 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 46 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-11-27 19:49:53,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 56 transitions, 308 flow [2024-11-27 19:49:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:49:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-11-27 19:49:53,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3321917808219178 [2024-11-27 19:49:53,088 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 218 flow. Second operand 4 states and 97 transitions. [2024-11-27 19:49:53,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 56 transitions, 308 flow [2024-11-27 19:49:53,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 56 transitions, 305 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:53,090 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 213 flow [2024-11-27 19:49:53,090 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2024-11-27 19:49:53,091 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 1 predicate places. [2024-11-27 19:49:53,091 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 213 flow [2024-11-27 19:49:53,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:53,091 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:53,091 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:53,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 19:49:53,091 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:53,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash -954055877, now seen corresponding path program 1 times [2024-11-27 19:49:53,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:53,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245111937] [2024-11-27 19:49:53,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:53,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 19:49:53,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:53,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245111937] [2024-11-27 19:49:53,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245111937] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:53,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:53,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:49:53,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146348911] [2024-11-27 19:49:53,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:53,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:49:53,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:53,151 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:49:53,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:49:53,151 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:53,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:53,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:53,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:53,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:53,379 INFO L124 PetriNetUnfolderBase]: 780/1332 cut-off events. [2024-11-27 19:49:53,379 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-11-27 19:49:53,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3109 conditions, 1332 events. 780/1332 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6597 event pairs, 385 based on Foata normal form. 1/1260 useless extension candidates. Maximal degree in co-relation 3061. Up to 763 conditions per place. [2024-11-27 19:49:53,382 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 54 selfloop transitions, 2 changer transitions 6/70 dead transitions. [2024-11-27 19:49:53,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 70 transitions, 378 flow [2024-11-27 19:49:53,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:49:53,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:49:53,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-27 19:49:53,383 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2024-11-27 19:49:53,383 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 213 flow. Second operand 3 states and 106 transitions. [2024-11-27 19:49:53,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 70 transitions, 378 flow [2024-11-27 19:49:53,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 70 transitions, 375 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:49:53,385 INFO L231 Difference]: Finished difference. Result has 71 places, 56 transitions, 218 flow [2024-11-27 19:49:53,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=71, PETRI_TRANSITIONS=56} [2024-11-27 19:49:53,385 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-27 19:49:53,385 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 56 transitions, 218 flow [2024-11-27 19:49:53,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:53,385 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:53,385 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:53,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-27 19:49:53,386 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:53,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:53,386 INFO L85 PathProgramCache]: Analyzing trace with hash -123471313, now seen corresponding path program 1 times [2024-11-27 19:49:53,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:53,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692017040] [2024-11-27 19:49:53,386 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:53,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:49:53,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:53,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692017040] [2024-11-27 19:49:53,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692017040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:53,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713315794] [2024-11-27 19:49:53,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:53,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:53,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:53,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:53,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:49:53,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:53,829 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:49:53,832 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:49:54,022 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:54,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-27 19:49:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:49:54,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713315794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:54,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:54,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-27 19:49:54,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858865201] [2024-11-27 19:49:54,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:54,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 19:49:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:54,314 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 19:49:54,314 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-27 19:49:54,381 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:54,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 56 transitions, 218 flow. Second operand has 18 states, 18 states have (on average 22.72222222222222) internal successors, (409), 18 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:54,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:54,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:54,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:54,963 INFO L124 PetriNetUnfolderBase]: 772/1311 cut-off events. [2024-11-27 19:49:54,963 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-27 19:49:54,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3197 conditions, 1311 events. 772/1311 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6334 event pairs, 380 based on Foata normal form. 36/1272 useless extension candidates. Maximal degree in co-relation 1971. Up to 649 conditions per place. [2024-11-27 19:49:54,967 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 40 selfloop transitions, 14 changer transitions 46/108 dead transitions. [2024-11-27 19:49:54,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 579 flow [2024-11-27 19:49:54,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 19:49:54,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 19:49:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 289 transitions. [2024-11-27 19:49:54,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35990037359900373 [2024-11-27 19:49:54,969 INFO L175 Difference]: Start difference. First operand has 71 places, 56 transitions, 218 flow. Second operand 11 states and 289 transitions. [2024-11-27 19:49:54,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 579 flow [2024-11-27 19:49:54,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 108 transitions, 574 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:54,972 INFO L231 Difference]: Finished difference. Result has 83 places, 55 transitions, 245 flow [2024-11-27 19:49:54,972 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=245, PETRI_PLACES=83, PETRI_TRANSITIONS=55} [2024-11-27 19:49:54,973 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-11-27 19:49:54,973 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 55 transitions, 245 flow [2024-11-27 19:49:54,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.72222222222222) internal successors, (409), 18 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:54,973 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:54,973 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:54,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:49:55,177 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:55,177 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:55,178 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash -1238169580, now seen corresponding path program 2 times [2024-11-27 19:49:55,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:55,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718549247] [2024-11-27 19:49:55,179 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:55,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:55,234 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 19:49:55,235 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-11-27 19:49:55,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:55,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718549247] [2024-11-27 19:49:55,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718549247] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:55,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:55,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:49:55,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686655504] [2024-11-27 19:49:55,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:55,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:49:55,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:55,373 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:49:55,373 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:49:55,384 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-27 19:49:55,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 55 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:55,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:55,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-27 19:49:55,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:55,676 INFO L124 PetriNetUnfolderBase]: 770/1292 cut-off events. [2024-11-27 19:49:55,676 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2024-11-27 19:49:55,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3293 conditions, 1292 events. 770/1292 cut-off events. For 797/797 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6332 event pairs, 77 based on Foata normal form. 59/1338 useless extension candidates. Maximal degree in co-relation 3241. Up to 852 conditions per place. [2024-11-27 19:49:55,683 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 73 selfloop transitions, 4 changer transitions 1/85 dead transitions. [2024-11-27 19:49:55,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 494 flow [2024-11-27 19:49:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:49:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:49:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-11-27 19:49:55,685 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41643835616438357 [2024-11-27 19:49:55,685 INFO L175 Difference]: Start difference. First operand has 83 places, 55 transitions, 245 flow. Second operand 5 states and 152 transitions. [2024-11-27 19:49:55,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 494 flow [2024-11-27 19:49:55,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 458 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-27 19:49:55,688 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 239 flow [2024-11-27 19:49:55,688 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=239, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2024-11-27 19:49:55,688 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 6 predicate places. [2024-11-27 19:49:55,688 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 239 flow [2024-11-27 19:49:55,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:55,690 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:55,690 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:55,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-27 19:49:55,690 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:55,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash 250479840, now seen corresponding path program 1 times [2024-11-27 19:49:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:55,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046421727] [2024-11-27 19:49:55,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 19:49:55,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:55,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046421727] [2024-11-27 19:49:55,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046421727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:55,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906491726] [2024-11-27 19:49:55,997 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:55,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:55,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:55,999 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:56,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:49:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:56,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:49:56,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:56,351 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 19:49:56,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 19:49:56,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906491726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:56,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:56,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-27 19:49:56,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671937759] [2024-11-27 19:49:56,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:56,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 19:49:56,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:56,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 19:49:56,622 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-27 19:49:56,677 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:56,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 239 flow. Second operand has 18 states, 18 states have (on average 23.166666666666668) internal successors, (417), 18 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:57,247 INFO L124 PetriNetUnfolderBase]: 928/1558 cut-off events. [2024-11-27 19:49:57,247 INFO L125 PetriNetUnfolderBase]: For 941/941 co-relation queries the response was YES. [2024-11-27 19:49:57,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4170 conditions, 1558 events. 928/1558 cut-off events. For 941/941 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7757 event pairs, 487 based on Foata normal form. 59/1566 useless extension candidates. Maximal degree in co-relation 4123. Up to 799 conditions per place. [2024-11-27 19:49:57,253 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 38 selfloop transitions, 17 changer transitions 40/103 dead transitions. [2024-11-27 19:49:57,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 103 transitions, 595 flow [2024-11-27 19:49:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-27 19:49:57,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-27 19:49:57,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 283 transitions. [2024-11-27 19:49:57,255 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.35242839352428396 [2024-11-27 19:49:57,255 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 239 flow. Second operand 11 states and 283 transitions. [2024-11-27 19:49:57,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 103 transitions, 595 flow [2024-11-27 19:49:57,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 103 transitions, 588 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-27 19:49:57,258 INFO L231 Difference]: Finished difference. Result has 89 places, 59 transitions, 309 flow [2024-11-27 19:49:57,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=309, PETRI_PLACES=89, PETRI_TRANSITIONS=59} [2024-11-27 19:49:57,258 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 20 predicate places. [2024-11-27 19:49:57,258 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 59 transitions, 309 flow [2024-11-27 19:49:57,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.166666666666668) internal successors, (417), 18 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:57,259 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:57,259 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:57,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 19:49:57,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-27 19:49:57,463 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:57,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:57,464 INFO L85 PathProgramCache]: Analyzing trace with hash -771723956, now seen corresponding path program 2 times [2024-11-27 19:49:57,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:57,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331202347] [2024-11-27 19:49:57,464 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:49:57,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:57,514 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:49:57,518 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:57,616 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-27 19:49:57,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:57,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331202347] [2024-11-27 19:49:57,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331202347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:57,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:57,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:49:57,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787952651] [2024-11-27 19:49:57,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:57,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:49:57,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:57,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:49:57,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:49:57,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:57,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 59 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:57,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:57,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:57,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:57,979 INFO L124 PetriNetUnfolderBase]: 1153/1989 cut-off events. [2024-11-27 19:49:57,979 INFO L125 PetriNetUnfolderBase]: For 1937/1937 co-relation queries the response was YES. [2024-11-27 19:49:57,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5413 conditions, 1989 events. 1153/1989 cut-off events. For 1937/1937 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 11625 event pairs, 335 based on Foata normal form. 57/2023 useless extension candidates. Maximal degree in co-relation 5349. Up to 608 conditions per place. [2024-11-27 19:49:57,989 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 82 selfloop transitions, 9 changer transitions 0/99 dead transitions. [2024-11-27 19:49:57,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 628 flow [2024-11-27 19:49:57,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:49:57,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:49:57,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 147 transitions. [2024-11-27 19:49:57,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5034246575342466 [2024-11-27 19:49:57,991 INFO L175 Difference]: Start difference. First operand has 89 places, 59 transitions, 309 flow. Second operand 4 states and 147 transitions. [2024-11-27 19:49:57,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 628 flow [2024-11-27 19:49:57,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 602 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-27 19:49:57,995 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 369 flow [2024-11-27 19:49:57,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=369, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2024-11-27 19:49:57,997 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 14 predicate places. [2024-11-27 19:49:57,997 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 369 flow [2024-11-27 19:49:57,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:57,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:57,997 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:57,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-27 19:49:57,997 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:57,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:57,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1406075410, now seen corresponding path program 3 times [2024-11-27 19:49:57,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:57,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693232590] [2024-11-27 19:49:57,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:49:57,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:58,049 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 19:49:58,049 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:49:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 19:49:58,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:58,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693232590] [2024-11-27 19:49:58,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693232590] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:49:58,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:49:58,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-27 19:49:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687615447] [2024-11-27 19:49:58,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:49:58,283 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 19:49:58,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:58,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 19:49:58,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:49:58,311 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:49:58,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 369 flow. Second operand has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:58,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:58,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:49:58,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:49:58,955 INFO L124 PetriNetUnfolderBase]: 2797/4436 cut-off events. [2024-11-27 19:49:58,956 INFO L125 PetriNetUnfolderBase]: For 5391/5391 co-relation queries the response was YES. [2024-11-27 19:49:58,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12250 conditions, 4436 events. 2797/4436 cut-off events. For 5391/5391 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 25257 event pairs, 460 based on Foata normal form. 0/4240 useless extension candidates. Maximal degree in co-relation 12188. Up to 2587 conditions per place. [2024-11-27 19:49:58,974 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 92 selfloop transitions, 7 changer transitions 1/105 dead transitions. [2024-11-27 19:49:58,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 105 transitions, 731 flow [2024-11-27 19:49:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 19:49:58,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-27 19:49:58,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-11-27 19:49:58,975 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3522504892367906 [2024-11-27 19:49:58,975 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 369 flow. Second operand 7 states and 180 transitions. [2024-11-27 19:49:58,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 105 transitions, 731 flow [2024-11-27 19:49:58,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 105 transitions, 715 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-11-27 19:49:58,980 INFO L231 Difference]: Finished difference. Result has 91 places, 67 transitions, 391 flow [2024-11-27 19:49:58,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=391, PETRI_PLACES=91, PETRI_TRANSITIONS=67} [2024-11-27 19:49:58,981 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 22 predicate places. [2024-11-27 19:49:58,981 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 67 transitions, 391 flow [2024-11-27 19:49:58,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.571428571428573) internal successors, (144), 7 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:58,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:49:58,981 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:49:58,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-27 19:49:58,981 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:49:58,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:49:58,982 INFO L85 PathProgramCache]: Analyzing trace with hash -597768836, now seen corresponding path program 1 times [2024-11-27 19:49:58,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:49:58,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024569299] [2024-11-27 19:49:58,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:58,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:49:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-27 19:49:59,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:49:59,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024569299] [2024-11-27 19:49:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024569299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:49:59,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700582264] [2024-11-27 19:49:59,301 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:49:59,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:49:59,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:49:59,303 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:49:59,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:49:59,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:49:59,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-27 19:49:59,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:49:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-27 19:49:59,652 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:49:59,934 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-27 19:49:59,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700582264] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:49:59,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:49:59,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-27 19:49:59,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90686713] [2024-11-27 19:49:59,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:49:59,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 19:49:59,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:49:59,936 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 19:49:59,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:49:59,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:49:59,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 67 transitions, 391 flow. Second operand has 16 states, 16 states have (on average 24.1875) internal successors, (387), 16 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:49:59,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:49:59,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:49:59,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:00,863 INFO L124 PetriNetUnfolderBase]: 2149/4070 cut-off events. [2024-11-27 19:50:00,863 INFO L125 PetriNetUnfolderBase]: For 6529/6827 co-relation queries the response was YES. [2024-11-27 19:50:00,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11920 conditions, 4070 events. 2149/4070 cut-off events. For 6529/6827 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 28157 event pairs, 1096 based on Foata normal form. 154/4211 useless extension candidates. Maximal degree in co-relation 11854. Up to 2047 conditions per place. [2024-11-27 19:50:00,876 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 42 selfloop transitions, 19 changer transitions 41/111 dead transitions. [2024-11-27 19:50:00,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 111 transitions, 813 flow [2024-11-27 19:50:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:50:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 19:50:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-11-27 19:50:00,878 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3683409436834094 [2024-11-27 19:50:00,878 INFO L175 Difference]: Start difference. First operand has 91 places, 67 transitions, 391 flow. Second operand 9 states and 242 transitions. [2024-11-27 19:50:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 111 transitions, 813 flow [2024-11-27 19:50:00,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 111 transitions, 802 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-27 19:50:00,883 INFO L231 Difference]: Finished difference. Result has 101 places, 69 transitions, 469 flow [2024-11-27 19:50:00,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=469, PETRI_PLACES=101, PETRI_TRANSITIONS=69} [2024-11-27 19:50:00,884 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 32 predicate places. [2024-11-27 19:50:00,884 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 69 transitions, 469 flow [2024-11-27 19:50:00,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 24.1875) internal successors, (387), 16 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:00,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:00,884 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:00,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 19:50:01,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:01,088 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:50:01,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:01,089 INFO L85 PathProgramCache]: Analyzing trace with hash -653110349, now seen corresponding path program 2 times [2024-11-27 19:50:01,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:01,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849169249] [2024-11-27 19:50:01,089 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:01,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:01,133 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:01,133 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 19:50:01,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:01,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849169249] [2024-11-27 19:50:01,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849169249] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:01,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:01,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 19:50:01,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887938045] [2024-11-27 19:50:01,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:01,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 19:50:01,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:01,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 19:50:01,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-27 19:50:01,236 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:50:01,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 69 transitions, 469 flow. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:01,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:01,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:50:01,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:02,161 INFO L124 PetriNetUnfolderBase]: 3124/5971 cut-off events. [2024-11-27 19:50:02,161 INFO L125 PetriNetUnfolderBase]: For 8999/9386 co-relation queries the response was YES. [2024-11-27 19:50:02,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17466 conditions, 5971 events. 3124/5971 cut-off events. For 8999/9386 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 43497 event pairs, 797 based on Foata normal form. 191/6155 useless extension candidates. Maximal degree in co-relation 17386. Up to 1755 conditions per place. [2024-11-27 19:50:02,208 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 100 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2024-11-27 19:50:02,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 115 transitions, 894 flow [2024-11-27 19:50:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:50:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:50:02,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-27 19:50:02,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2024-11-27 19:50:02,210 INFO L175 Difference]: Start difference. First operand has 101 places, 69 transitions, 469 flow. Second operand 4 states and 144 transitions. [2024-11-27 19:50:02,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 115 transitions, 894 flow [2024-11-27 19:50:02,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 115 transitions, 870 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-27 19:50:02,325 INFO L231 Difference]: Finished difference. Result has 98 places, 72 transitions, 501 flow [2024-11-27 19:50:02,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=501, PETRI_PLACES=98, PETRI_TRANSITIONS=72} [2024-11-27 19:50:02,327 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 29 predicate places. [2024-11-27 19:50:02,327 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 72 transitions, 501 flow [2024-11-27 19:50:02,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 5 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:02,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:02,327 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:02,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-27 19:50:02,327 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:50:02,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:02,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1591421945, now seen corresponding path program 3 times [2024-11-27 19:50:02,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:02,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344493287] [2024-11-27 19:50:02,328 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:50:02,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:02,399 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-27 19:50:02,399 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:03,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-27 19:50:03,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:03,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344493287] [2024-11-27 19:50:03,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344493287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:03,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:03,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-11-27 19:50:03,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683537832] [2024-11-27 19:50:03,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:03,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 19:50:03,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:03,113 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 19:50:03,113 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:50:03,190 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 73 [2024-11-27 19:50:03,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 72 transitions, 501 flow. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:03,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:03,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 73 [2024-11-27 19:50:03,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:04,749 INFO L124 PetriNetUnfolderBase]: 5443/9187 cut-off events. [2024-11-27 19:50:04,749 INFO L125 PetriNetUnfolderBase]: For 16041/16391 co-relation queries the response was YES. [2024-11-27 19:50:04,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28494 conditions, 9187 events. 5443/9187 cut-off events. For 16041/16391 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 62343 event pairs, 2833 based on Foata normal form. 5/9171 useless extension candidates. Maximal degree in co-relation 28414. Up to 7396 conditions per place. [2024-11-27 19:50:04,788 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 99 selfloop transitions, 14 changer transitions 10/130 dead transitions. [2024-11-27 19:50:04,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 130 transitions, 956 flow [2024-11-27 19:50:04,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:50:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 19:50:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2024-11-27 19:50:04,790 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3356164383561644 [2024-11-27 19:50:04,790 INFO L175 Difference]: Start difference. First operand has 98 places, 72 transitions, 501 flow. Second operand 12 states and 294 transitions. [2024-11-27 19:50:04,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 130 transitions, 956 flow [2024-11-27 19:50:04,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 130 transitions, 948 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-27 19:50:04,806 INFO L231 Difference]: Finished difference. Result has 110 places, 79 transitions, 577 flow [2024-11-27 19:50:04,806 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=577, PETRI_PLACES=110, PETRI_TRANSITIONS=79} [2024-11-27 19:50:04,807 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 41 predicate places. [2024-11-27 19:50:04,807 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 79 transitions, 577 flow [2024-11-27 19:50:04,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:04,807 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:04,807 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:04,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-27 19:50:04,807 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:50:04,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:04,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1929589235, now seen corresponding path program 4 times [2024-11-27 19:50:04,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:04,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644796299] [2024-11-27 19:50:04,808 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:50:04,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:04,869 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:50:04,872 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-27 19:50:04,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:04,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644796299] [2024-11-27 19:50:04,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644796299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:50:04,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:50:04,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-27 19:50:04,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311935196] [2024-11-27 19:50:04,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:50:04,964 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:50:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:04,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:50:04,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:50:04,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:50:04,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 79 transitions, 577 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:04,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:04,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:50:04,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:05,146 INFO L124 PetriNetUnfolderBase]: 383/896 cut-off events. [2024-11-27 19:50:05,146 INFO L125 PetriNetUnfolderBase]: For 1059/1074 co-relation queries the response was YES. [2024-11-27 19:50:05,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2472 conditions, 896 events. 383/896 cut-off events. For 1059/1074 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4525 event pairs, 283 based on Foata normal form. 36/931 useless extension candidates. Maximal degree in co-relation 2389. Up to 566 conditions per place. [2024-11-27 19:50:05,150 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 60 selfloop transitions, 6 changer transitions 0/75 dead transitions. [2024-11-27 19:50:05,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 75 transitions, 640 flow [2024-11-27 19:50:05,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:50:05,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:50:05,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-27 19:50:05,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3972602739726027 [2024-11-27 19:50:05,152 INFO L175 Difference]: Start difference. First operand has 110 places, 79 transitions, 577 flow. Second operand 4 states and 116 transitions. [2024-11-27 19:50:05,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 75 transitions, 640 flow [2024-11-27 19:50:05,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 75 transitions, 585 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-11-27 19:50:05,157 INFO L231 Difference]: Finished difference. Result has 99 places, 67 transitions, 444 flow [2024-11-27 19:50:05,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=99, PETRI_TRANSITIONS=67} [2024-11-27 19:50:05,158 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 30 predicate places. [2024-11-27 19:50:05,158 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 67 transitions, 444 flow [2024-11-27 19:50:05,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:05,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:05,158 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:05,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-27 19:50:05,160 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:50:05,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash -697801825, now seen corresponding path program 5 times [2024-11-27 19:50:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:05,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175915796] [2024-11-27 19:50:05,161 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:50:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:05,228 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 19:50:05,228 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 19:50:05,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:05,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175915796] [2024-11-27 19:50:05,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175915796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:05,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161304231] [2024-11-27 19:50:05,513 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:50:05,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:05,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:05,515 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:05,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:50:05,729 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-27 19:50:05,730 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:05,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 19:50:05,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 19:50:06,051 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:06,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 4 [2024-11-27 19:50:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-27 19:50:06,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161304231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:06,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:06,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-11-27 19:50:06,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131838544] [2024-11-27 19:50:06,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:06,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 19:50:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:06,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 19:50:06,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2024-11-27 19:50:06,535 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:50:06,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 67 transitions, 444 flow. Second operand has 24 states, 24 states have (on average 22.666666666666668) internal successors, (544), 24 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:06,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:06,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:50:06,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:07,282 INFO L124 PetriNetUnfolderBase]: 586/1379 cut-off events. [2024-11-27 19:50:07,282 INFO L125 PetriNetUnfolderBase]: For 851/881 co-relation queries the response was YES. [2024-11-27 19:50:07,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3555 conditions, 1379 events. 586/1379 cut-off events. For 851/881 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 7566 event pairs, 336 based on Foata normal form. 16/1380 useless extension candidates. Maximal degree in co-relation 2208. Up to 602 conditions per place. [2024-11-27 19:50:07,288 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 48 selfloop transitions, 19 changer transitions 64/140 dead transitions. [2024-11-27 19:50:07,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 1081 flow [2024-11-27 19:50:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 19:50:07,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 19:50:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 359 transitions. [2024-11-27 19:50:07,290 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3512720156555773 [2024-11-27 19:50:07,290 INFO L175 Difference]: Start difference. First operand has 99 places, 67 transitions, 444 flow. Second operand 14 states and 359 transitions. [2024-11-27 19:50:07,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 1081 flow [2024-11-27 19:50:07,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 140 transitions, 1064 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-27 19:50:07,295 INFO L231 Difference]: Finished difference. Result has 117 places, 69 transitions, 533 flow [2024-11-27 19:50:07,295 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=533, PETRI_PLACES=117, PETRI_TRANSITIONS=69} [2024-11-27 19:50:07,296 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 48 predicate places. [2024-11-27 19:50:07,296 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 69 transitions, 533 flow [2024-11-27 19:50:07,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 22.666666666666668) internal successors, (544), 24 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:07,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:07,296 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:07,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:07,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:07,497 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:50:07,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:07,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1320935916, now seen corresponding path program 6 times [2024-11-27 19:50:07,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:07,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119654103] [2024-11-27 19:50:07,498 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:50:07,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:07,585 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 19:50:07,585 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:07,992 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-27 19:50:07,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119654103] [2024-11-27 19:50:07,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119654103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:07,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507929586] [2024-11-27 19:50:07,992 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-27 19:50:07,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:07,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:07,994 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:07,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:50:08,220 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-27 19:50:08,221 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:08,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 19:50:08,231 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:08,332 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 5 treesize of output 3 [2024-11-27 19:50:08,335 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 10 treesize of output 8 [2024-11-27 19:50:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-27 19:50:08,391 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:08,478 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-27 19:50:08,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-27 19:50:08,684 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-27 19:50:08,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507929586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:08,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:08,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-27 19:50:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544583659] [2024-11-27 19:50:08,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:08,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-27 19:50:08,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:08,685 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-27 19:50:08,686 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-27 19:50:08,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 73 [2024-11-27 19:50:08,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 69 transitions, 533 flow. Second operand has 16 states, 16 states have (on average 20.875) internal successors, (334), 16 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:08,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:08,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 73 [2024-11-27 19:50:08,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:09,152 INFO L124 PetriNetUnfolderBase]: 573/1181 cut-off events. [2024-11-27 19:50:09,152 INFO L125 PetriNetUnfolderBase]: For 1037/1062 co-relation queries the response was YES. [2024-11-27 19:50:09,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3155 conditions, 1181 events. 573/1181 cut-off events. For 1037/1062 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5780 event pairs, 173 based on Foata normal form. 48/1219 useless extension candidates. Maximal degree in co-relation 3049. Up to 401 conditions per place. [2024-11-27 19:50:09,157 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 78 selfloop transitions, 8 changer transitions 12/105 dead transitions. [2024-11-27 19:50:09,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 105 transitions, 854 flow [2024-11-27 19:50:09,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 19:50:09,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 19:50:09,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-11-27 19:50:09,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-27 19:50:09,158 INFO L175 Difference]: Start difference. First operand has 117 places, 69 transitions, 533 flow. Second operand 9 states and 219 transitions. [2024-11-27 19:50:09,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 105 transitions, 854 flow [2024-11-27 19:50:09,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 105 transitions, 814 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-11-27 19:50:09,163 INFO L231 Difference]: Finished difference. Result has 113 places, 70 transitions, 535 flow [2024-11-27 19:50:09,163 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=495, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=535, PETRI_PLACES=113, PETRI_TRANSITIONS=70} [2024-11-27 19:50:09,164 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 44 predicate places. [2024-11-27 19:50:09,164 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 70 transitions, 535 flow [2024-11-27 19:50:09,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.875) internal successors, (334), 16 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:09,164 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:09,164 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:09,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-27 19:50:09,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-27 19:50:09,365 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:50:09,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash 758939960, now seen corresponding path program 7 times [2024-11-27 19:50:09,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:09,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381387581] [2024-11-27 19:50:09,366 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:50:09,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 19:50:09,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:09,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381387581] [2024-11-27 19:50:09,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381387581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:09,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579418290] [2024-11-27 19:50:09,745 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-27 19:50:09,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:09,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:09,747 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:09,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:50:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:50:09,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 19:50:09,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 19:50:10,238 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-11-27 19:50:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579418290] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:10,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2024-11-27 19:50:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082052920] [2024-11-27 19:50:10,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:10,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-27 19:50:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:10,558 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-27 19:50:10,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=420, Unknown=0, NotChecked=0, Total=552 [2024-11-27 19:50:10,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:50:10,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 70 transitions, 535 flow. Second operand has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:10,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:50:10,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:50:10,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:50:11,206 INFO L124 PetriNetUnfolderBase]: 370/877 cut-off events. [2024-11-27 19:50:11,206 INFO L125 PetriNetUnfolderBase]: For 798/822 co-relation queries the response was YES. [2024-11-27 19:50:11,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2580 conditions, 877 events. 370/877 cut-off events. For 798/822 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 3920 event pairs, 261 based on Foata normal form. 14/883 useless extension candidates. Maximal degree in co-relation 2479. Up to 304 conditions per place. [2024-11-27 19:50:11,209 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 45 selfloop transitions, 22 changer transitions 52/128 dead transitions. [2024-11-27 19:50:11,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 128 transitions, 1107 flow [2024-11-27 19:50:11,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 19:50:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 19:50:11,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 348 transitions. [2024-11-27 19:50:11,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3405088062622309 [2024-11-27 19:50:11,210 INFO L175 Difference]: Start difference. First operand has 113 places, 70 transitions, 535 flow. Second operand 14 states and 348 transitions. [2024-11-27 19:50:11,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 128 transitions, 1107 flow [2024-11-27 19:50:11,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 128 transitions, 1058 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-27 19:50:11,215 INFO L231 Difference]: Finished difference. Result has 126 places, 72 transitions, 617 flow [2024-11-27 19:50:11,216 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=106, 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=14, PETRI_FLOW=617, PETRI_PLACES=126, PETRI_TRANSITIONS=72} [2024-11-27 19:50:11,216 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 57 predicate places. [2024-11-27 19:50:11,216 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 72 transitions, 617 flow [2024-11-27 19:50:11,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 23.0) internal successors, (552), 24 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:50:11,217 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:50:11,217 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:50:11,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 19:50:11,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-27 19:50:11,421 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:50:11,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:50:11,422 INFO L85 PathProgramCache]: Analyzing trace with hash -412829218, now seen corresponding path program 8 times [2024-11-27 19:50:11,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:50:11,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518983690] [2024-11-27 19:50:11,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:11,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:50:11,495 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:11,495 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 19:50:13,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:50:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518983690] [2024-11-27 19:50:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518983690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:50:13,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101577419] [2024-11-27 19:50:13,736 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:50:13,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:50:13,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:50:13,738 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:50:13,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 19:50:14,029 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:50:14,029 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:50:14,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-27 19:50:14,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:50:15,187 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:50:15,187 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 21 treesize of output 25 [2024-11-27 19:50:15,199 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-27 19:50:15,199 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 7 [2024-11-27 19:50:15,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:50:15,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 60 [2024-11-27 19:50:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 19:50:15,658 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:50:29,839 INFO L349 Elim1Store]: treesize reduction 4, result has 97.2 percent of original size [2024-11-27 19:50:29,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 91 treesize of output 188 [2024-11-27 19:50:29,886 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:50:29,886 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 21 treesize of output 25 [2024-11-27 19:50:29,914 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-27 19:50:29,914 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 13 treesize of output 9 [2024-11-27 19:50:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 19:50:31,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101577419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:50:31,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:50:31,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 16] total 49 [2024-11-27 19:50:31,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948062521] [2024-11-27 19:50:31,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:50:31,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-27 19:50:31,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:50:31,122 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-27 19:50:31,122 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2160, Unknown=3, NotChecked=0, Total=2450 [2024-11-27 19:50:35,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:50:39,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:50:44,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:50:48,791 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:50:53,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:50:57,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:01,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:05,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:09,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:12,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:16,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:20,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:20,930 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 73 [2024-11-27 19:51:20,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 72 transitions, 617 flow. Second operand has 50 states, 50 states have (on average 8.26) internal successors, (413), 50 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:20,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:51:20,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 73 [2024-11-27 19:51:20,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:51:31,436 INFO L124 PetriNetUnfolderBase]: 4614/7561 cut-off events. [2024-11-27 19:51:31,436 INFO L125 PetriNetUnfolderBase]: For 7483/7483 co-relation queries the response was YES. [2024-11-27 19:51:31,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20914 conditions, 7561 events. 4614/7561 cut-off events. For 7483/7483 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 39533 event pairs, 1416 based on Foata normal form. 84/7644 useless extension candidates. Maximal degree in co-relation 14376. Up to 1541 conditions per place. [2024-11-27 19:51:31,466 INFO L140 encePairwiseOnDemand]: 56/73 looper letters, 248 selfloop transitions, 75 changer transitions 54/379 dead transitions. [2024-11-27 19:51:31,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 379 transitions, 2825 flow [2024-11-27 19:51:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-11-27 19:51:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-11-27 19:51:31,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 591 transitions. [2024-11-27 19:51:31,469 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.16522225328487558 [2024-11-27 19:51:31,469 INFO L175 Difference]: Start difference. First operand has 126 places, 72 transitions, 617 flow. Second operand 49 states and 591 transitions. [2024-11-27 19:51:31,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 379 transitions, 2825 flow [2024-11-27 19:51:31,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 379 transitions, 2771 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-11-27 19:51:31,495 INFO L231 Difference]: Finished difference. Result has 172 places, 122 transitions, 1425 flow [2024-11-27 19:51:31,495 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=1425, PETRI_PLACES=172, PETRI_TRANSITIONS=122} [2024-11-27 19:51:31,496 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 103 predicate places. [2024-11-27 19:51:31,496 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 122 transitions, 1425 flow [2024-11-27 19:51:31,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 8.26) internal successors, (413), 50 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:51:31,496 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:51:31,497 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:51:31,509 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-27 19:51:31,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-27 19:51:31,698 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:51:31,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:51:31,698 INFO L85 PathProgramCache]: Analyzing trace with hash -182811148, now seen corresponding path program 9 times [2024-11-27 19:51:31,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:51:31,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767757514] [2024-11-27 19:51:31,698 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:31,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:51:31,804 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:51:31,804 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-27 19:51:33,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:51:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767757514] [2024-11-27 19:51:33,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767757514] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:51:33,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425212144] [2024-11-27 19:51:33,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 19:51:33,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:51:33,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:51:33,684 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:51:33,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 19:51:33,926 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 19:51:33,927 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:51:33,929 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-27 19:51:33,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:51:34,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:51:34,642 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 21 treesize of output 25 [2024-11-27 19:51:34,653 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-27 19:51:34,653 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 7 [2024-11-27 19:51:34,862 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:51:34,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 46 treesize of output 54 [2024-11-27 19:51:35,049 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 19:51:35,049 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:51:48,689 INFO L349 Elim1Store]: treesize reduction 8, result has 94.4 percent of original size [2024-11-27 19:51:48,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 61 treesize of output 151 [2024-11-27 19:51:48,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:51:48,724 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 21 treesize of output 25 [2024-11-27 19:51:48,750 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-27 19:51:48,751 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 13 treesize of output 9 [2024-11-27 19:51:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-27 19:51:49,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425212144] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:51:49,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:51:49,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 12] total 30 [2024-11-27 19:51:49,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747564220] [2024-11-27 19:51:49,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:51:49,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-27 19:51:49,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:51:49,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-27 19:51:49,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=766, Unknown=3, NotChecked=0, Total=870 [2024-11-27 19:51:53,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:51:56,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:00,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:04,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:08,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:13,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:17,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:21,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:25,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:52:25,471 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 73 [2024-11-27 19:52:25,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 122 transitions, 1425 flow. Second operand has 30 states, 30 states have (on average 9.1) internal successors, (273), 30 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:25,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:25,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 73 [2024-11-27 19:52:25,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:29,124 INFO L124 PetriNetUnfolderBase]: 2771/4671 cut-off events. [2024-11-27 19:52:29,124 INFO L125 PetriNetUnfolderBase]: For 9727/9727 co-relation queries the response was YES. [2024-11-27 19:52:29,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14718 conditions, 4671 events. 2771/4671 cut-off events. For 9727/9727 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 21650 event pairs, 419 based on Foata normal form. 143/4811 useless extension candidates. Maximal degree in co-relation 12237. Up to 1035 conditions per place. [2024-11-27 19:52:29,146 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 152 selfloop transitions, 54 changer transitions 21/229 dead transitions. [2024-11-27 19:52:29,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 229 transitions, 2334 flow [2024-11-27 19:52:29,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-27 19:52:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-27 19:52:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 269 transitions. [2024-11-27 19:52:29,148 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.16021441334127456 [2024-11-27 19:52:29,148 INFO L175 Difference]: Start difference. First operand has 172 places, 122 transitions, 1425 flow. Second operand 23 states and 269 transitions. [2024-11-27 19:52:29,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 229 transitions, 2334 flow [2024-11-27 19:52:29,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 229 transitions, 2249 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-11-27 19:52:29,174 INFO L231 Difference]: Finished difference. Result has 190 places, 137 transitions, 1642 flow [2024-11-27 19:52:29,174 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1359, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1642, PETRI_PLACES=190, PETRI_TRANSITIONS=137} [2024-11-27 19:52:29,174 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 121 predicate places. [2024-11-27 19:52:29,174 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 137 transitions, 1642 flow [2024-11-27 19:52:29,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.1) internal successors, (273), 30 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:29,175 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:29,175 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:29,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 19:52:29,375 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-27 19:52:29,375 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:52:29,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash -853571914, now seen corresponding path program 10 times [2024-11-27 19:52:29,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:29,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853357340] [2024-11-27 19:52:29,376 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:52:29,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:29,431 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:52:29,431 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 19:52:29,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:29,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853357340] [2024-11-27 19:52:29,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853357340] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:29,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785628974] [2024-11-27 19:52:29,864 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-27 19:52:29,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:29,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:29,875 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:29,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 19:52:30,160 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-27 19:52:30,160 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:30,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-27 19:52:30,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:30,599 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 19:52:30,603 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:52:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-11-27 19:52:31,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785628974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:52:31,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 19:52:31,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2024-11-27 19:52:31,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740191436] [2024-11-27 19:52:31,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 19:52:31,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-27 19:52:31,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 19:52:31,128 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-27 19:52:31,128 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2024-11-27 19:52:31,241 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:52:31,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 137 transitions, 1642 flow. Second operand has 22 states, 22 states have (on average 23.545454545454547) internal successors, (518), 22 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:31,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:52:31,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:52:31,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:52:32,150 INFO L124 PetriNetUnfolderBase]: 868/2097 cut-off events. [2024-11-27 19:52:32,150 INFO L125 PetriNetUnfolderBase]: For 5703/5811 co-relation queries the response was YES. [2024-11-27 19:52:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7241 conditions, 2097 events. 868/2097 cut-off events. For 5703/5811 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 12200 event pairs, 642 based on Foata normal form. 35/2126 useless extension candidates. Maximal degree in co-relation 6420. Up to 498 conditions per place. [2024-11-27 19:52:32,163 INFO L140 encePairwiseOnDemand]: 62/73 looper letters, 87 selfloop transitions, 47 changer transitions 79/223 dead transitions. [2024-11-27 19:52:32,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 223 transitions, 2878 flow [2024-11-27 19:52:32,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 19:52:32,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-27 19:52:32,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 305 transitions. [2024-11-27 19:52:32,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3481735159817352 [2024-11-27 19:52:32,165 INFO L175 Difference]: Start difference. First operand has 190 places, 137 transitions, 1642 flow. Second operand 12 states and 305 transitions. [2024-11-27 19:52:32,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 223 transitions, 2878 flow [2024-11-27 19:52:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 223 transitions, 2632 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-11-27 19:52:32,188 INFO L231 Difference]: Finished difference. Result has 194 places, 143 transitions, 1790 flow [2024-11-27 19:52:32,188 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1790, PETRI_PLACES=194, PETRI_TRANSITIONS=143} [2024-11-27 19:52:32,189 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 125 predicate places. [2024-11-27 19:52:32,189 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 143 transitions, 1790 flow [2024-11-27 19:52:32,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 23.545454545454547) internal successors, (518), 22 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:52:32,189 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:52:32,189 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:52:32,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-27 19:52:32,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-27 19:52:32,390 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:52:32,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:52:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash -609126435, now seen corresponding path program 11 times [2024-11-27 19:52:32,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 19:52:32,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797848353] [2024-11-27 19:52:32,391 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:52:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 19:52:32,606 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-27 19:52:32,607 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:52:40,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 19:52:40,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797848353] [2024-11-27 19:52:40,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797848353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 19:52:40,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365640808] [2024-11-27 19:52:40,555 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-27 19:52:40,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:52:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:52:40,558 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:52:40,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 19:52:41,038 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-27 19:52:41,038 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:52:41,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-27 19:52:41,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:52:41,355 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 [2024-11-27 19:52:41,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-27 19:52:41,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-27 19:52:41,810 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 19:52:41,810 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 [2024-11-27 19:52:41,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-27 19:52:42,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 1 [2024-11-27 19:52:42,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-27 19:52:53,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:52:53,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:52:53,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:52:53,843 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 19:52:53,845 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 19:52:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:52:53,853 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-27 19:52:53,924 INFO L349 Elim1Store]: treesize reduction 64, result has 32.6 percent of original size [2024-11-27 19:52:53,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 64 [2024-11-27 19:52:53,947 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 7 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 19:52:53,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:53:04,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:53:04,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2024-11-27 19:53:04,179 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2024-11-27 19:53:04,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 13 [2024-11-27 19:53:19,076 INFO L349 Elim1Store]: treesize reduction 76, result has 47.2 percent of original size [2024-11-27 19:53:19,077 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 2375 treesize of output 1846 [2024-11-27 19:54:12,400 INFO L349 Elim1Store]: treesize reduction 96, result has 64.6 percent of original size [2024-11-27 19:54:12,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 6 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 2206 treesize of output 1661 [2024-11-27 19:54:13,293 INFO L349 Elim1Store]: treesize reduction 188, result has 29.1 percent of original size [2024-11-27 19:54:13,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 18 case distinctions, treesize of input 2520 treesize of output 2547 [2024-11-27 19:54:13,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:13,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 2198 treesize of output 2407 [2024-11-27 19:54:14,808 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:14,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 34 case distinctions, treesize of input 2138 treesize of output 2524 [2024-11-27 19:54:15,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:15,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 2039 treesize of output 2242 [2024-11-27 19:54:16,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:16,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 2 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 34 case distinctions, treesize of input 1973 treesize of output 2295 [2024-11-27 19:54:17,811 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:17,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1872 treesize of output 2143 [2024-11-27 19:54:19,124 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:19,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 2333 treesize of output 2469 [2024-11-27 19:54:21,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:21,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 2194 treesize of output 2675 [2024-11-27 19:54:22,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:22,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 2068 treesize of output 2271 [2024-11-27 19:54:24,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:24,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 2002 treesize of output 2385 [2024-11-27 19:54:25,621 INFO L224 Elim1Store]: Index analysis took 107 ms [2024-11-27 19:54:26,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:26,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 1896 treesize of output 2105 [2024-11-27 19:54:29,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 19:54:29,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 1836 treesize of output 2343 [2024-11-27 19:57:44,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 101 [2024-11-27 19:57:44,925 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-27 19:57:44,926 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-11-27 19:57:44,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 19:57:45,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-27 19:57:45,129 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.pushInner(QuantifierPusher.java:274) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:194) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:238) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2024-11-27 19:57:45,136 INFO L158 Benchmark]: Toolchain (without parser) took 500310.67ms. Allocated memory was 117.4MB in the beginning and 520.1MB in the end (delta: 402.7MB). Free memory was 92.5MB in the beginning and 205.7MB in the end (delta: -113.2MB). Peak memory consumption was 330.5MB. Max. memory is 16.1GB. [2024-11-27 19:57:45,136 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 117.4MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:57:45,137 INFO L158 Benchmark]: CACSL2BoogieTranslator took 384.81ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 79.6MB in the end (delta: 12.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-27 19:57:45,137 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.72ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 77.4MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:57:45,137 INFO L158 Benchmark]: Boogie Preprocessor took 78.14ms. Allocated memory is still 117.4MB. Free memory was 77.4MB in the beginning and 74.6MB in the end (delta: 2.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-27 19:57:45,137 INFO L158 Benchmark]: RCFGBuilder took 1741.28ms. Allocated memory is still 117.4MB. Free memory was 74.6MB in the beginning and 36.2MB in the end (delta: 38.5MB). Peak memory consumption was 47.0MB. Max. memory is 16.1GB. [2024-11-27 19:57:45,138 INFO L158 Benchmark]: TraceAbstraction took 498037.47ms. Allocated memory was 117.4MB in the beginning and 520.1MB in the end (delta: 402.7MB). Free memory was 35.6MB in the beginning and 205.7MB in the end (delta: -170.1MB). Peak memory consumption was 275.2MB. Max. memory is 16.1GB. [2024-11-27 19:57:45,143 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 117.4MB. Free memory is still 72.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 384.81ms. Allocated memory is still 117.4MB. Free memory was 92.5MB in the beginning and 79.6MB in the end (delta: 12.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.72ms. Allocated memory is still 117.4MB. Free memory was 79.6MB in the beginning and 77.4MB in the end (delta: 2.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 78.14ms. Allocated memory is still 117.4MB. Free memory was 77.4MB in the beginning and 74.6MB in the end (delta: 2.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 1741.28ms. Allocated memory is still 117.4MB. Free memory was 74.6MB in the beginning and 36.2MB in the end (delta: 38.5MB). Peak memory consumption was 47.0MB. Max. memory is 16.1GB. * TraceAbstraction took 498037.47ms. Allocated memory was 117.4MB in the beginning and 520.1MB in the end (delta: 402.7MB). Free memory was 35.6MB in the beginning and 205.7MB in the end (delta: -170.1MB). Peak memory consumption was 275.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB --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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 19:57:48,066 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 19:57:48,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-11-27 19:57:48,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 19:57:48,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 19:57:48,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 19:57:48,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 19:57:48,262 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 19:57:48,263 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 19:57:48,263 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 19:57:48,263 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 19:57:48,263 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 19:57:48,264 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 19:57:48,264 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 19:57:48,264 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 19:57:48,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 19:57:48,265 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 19:57:48,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 19:57:48,265 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 19:57:48,265 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 19:57:48,265 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 19:57:48,265 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 19:57:48,265 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 19:57:48,266 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 19:57:48,267 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:57:48,267 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 19:57:48,267 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:57:48,268 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 19:57:48,268 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 19:57:48,268 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-11-27 19:57:48,269 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-27 19:57:48,269 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 19:57:48,269 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 19:57:48,269 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 19:57:48,269 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 19:57:48,270 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_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB 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 -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-11-27 19:57:48,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 19:57:48,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 19:57:48,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 19:57:48,750 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 19:57:48,750 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 19:57:48,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-27 19:57:52,006 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/7181f47ac/62e1d85d60ba43c7a0d36e82ecc1e7eb/FLAG2fe8c79e5 [2024-11-27 19:57:52,349 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 19:57:52,350 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-27 19:57:52,365 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/7181f47ac/62e1d85d60ba43c7a0d36e82ecc1e7eb/FLAG2fe8c79e5 [2024-11-27 19:57:52,598 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/data/7181f47ac/62e1d85d60ba43c7a0d36e82ecc1e7eb [2024-11-27 19:57:52,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 19:57:52,605 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 19:57:52,608 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 19:57:52,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 19:57:52,614 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 19:57:52,616 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:57:52" (1/1) ... [2024-11-27 19:57:52,617 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d28372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:52, skipping insertion in model container [2024-11-27 19:57:52,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 07:57:52" (1/1) ... [2024-11-27 19:57:52,647 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 19:57:52,972 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 19:57:52,978 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:57:53,007 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 19:57:53,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 19:57:53,100 INFO L204 MainTranslator]: Completed translation [2024-11-27 19:57:53,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53 WrapperNode [2024-11-27 19:57:53,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 19:57:53,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 19:57:53,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 19:57:53,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 19:57:53,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,191 INFO L138 Inliner]: procedures = 26, calls = 47, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 298 [2024-11-27 19:57:53,195 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 19:57:53,196 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 19:57:53,196 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 19:57:53,196 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 19:57:53,209 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,209 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,219 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,259 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2024-11-27 19:57:53,261 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,262 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,282 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,287 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,297 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,309 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,317 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 19:57:53,318 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 19:57:53,318 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 19:57:53,318 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 19:57:53,319 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (1/1) ... [2024-11-27 19:57:53,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 19:57:53,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:53,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 19:57:53,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 19:57:53,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 19:57:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-27 19:57:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-11-27 19:57:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-11-27 19:57:53,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-11-27 19:57:53,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 19:57:53,401 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 19:57:53,401 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 19:57:53,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 19:57:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 19:57:53,402 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 19:57:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-27 19:57:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-27 19:57:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 19:57:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 19:57:53,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 19:57:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-11-27 19:57:53,404 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-11-27 19:57:53,406 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 19:57:53,563 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 19:57:53,566 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 19:57:54,395 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 19:57:54,396 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 19:57:54,939 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 19:57:54,939 INFO L312 CfgBuilder]: Removed 8 assume(true) statements. [2024-11-27 19:57:54,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:57:54 BoogieIcfgContainer [2024-11-27 19:57:54,940 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 19:57:54,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 19:57:54,943 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 19:57:54,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 19:57:54,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 07:57:52" (1/3) ... [2024-11-27 19:57:54,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405db741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:57:54, skipping insertion in model container [2024-11-27 19:57:54,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 07:57:53" (2/3) ... [2024-11-27 19:57:54,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@405db741 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 07:57:54, skipping insertion in model container [2024-11-27 19:57:54,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 07:57:54" (3/3) ... [2024-11-27 19:57:54,951 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-11-27 19:57:54,968 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 19:57:54,970 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-ring.wvr.c that has 4 procedures, 64 locations, 1 initial locations, 6 loop locations, and 22 error locations. [2024-11-27 19:57:54,970 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 19:57:55,085 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 19:57:55,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 167 flow [2024-11-27 19:57:55,169 INFO L124 PetriNetUnfolderBase]: 10/70 cut-off events. [2024-11-27 19:57:55,172 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 19:57:55,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 70 events. 10/70 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 181 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 51. Up to 3 conditions per place. [2024-11-27 19:57:55,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 73 transitions, 167 flow [2024-11-27 19:57:55,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 69 transitions, 156 flow [2024-11-27 19:57:55,188 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 19:57:55,220 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;@5a13c27b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 19:57:55,220 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-27 19:57:55,224 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 19:57:55,224 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 19:57:55,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 19:57:55,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:55,225 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 19:57:55,225 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:57:55,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:55,234 INFO L85 PathProgramCache]: Analyzing trace with hash 925263, now seen corresponding path program 1 times [2024-11-27 19:57:55,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:57:55,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860134452] [2024-11-27 19:57:55,245 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:55,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:55,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:55,250 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:55,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 19:57:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:55,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-27 19:57:55,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:55,440 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 7 [2024-11-27 19:57:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:57:55,467 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:57:55,468 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:57:55,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860134452] [2024-11-27 19:57:55,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860134452] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:55,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:55,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 19:57:55,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355781219] [2024-11-27 19:57:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:55,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:57:55,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:57:55,517 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:57:55,517 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 19:57:55,580 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:57:55,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:55,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:55,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:57:55,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:57:57,711 INFO L124 PetriNetUnfolderBase]: 5733/8828 cut-off events. [2024-11-27 19:57:57,713 INFO L125 PetriNetUnfolderBase]: For 356/356 co-relation queries the response was YES. [2024-11-27 19:57:57,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17072 conditions, 8828 events. 5733/8828 cut-off events. For 356/356 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54853 event pairs, 5236 based on Foata normal form. 1/5199 useless extension candidates. Maximal degree in co-relation 16460. Up to 7878 conditions per place. [2024-11-27 19:57:57,833 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 47 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-27 19:57:57,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 60 transitions, 236 flow [2024-11-27 19:57:57,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:57:57,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:57:57,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-11-27 19:57:57,850 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4657534246575342 [2024-11-27 19:57:57,852 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 156 flow. Second operand 3 states and 102 transitions. [2024-11-27 19:57:57,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 60 transitions, 236 flow [2024-11-27 19:57:57,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 60 transitions, 224 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 19:57:57,884 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 130 flow [2024-11-27 19:57:57,887 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-11-27 19:57:57,893 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2024-11-27 19:57:57,894 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 130 flow [2024-11-27 19:57:57,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:57,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:57:57,895 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 19:57:57,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 19:57:58,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:58,100 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:57:58,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:57:58,100 INFO L85 PathProgramCache]: Analyzing trace with hash 925264, now seen corresponding path program 1 times [2024-11-27 19:57:58,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:57:58,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304097075] [2024-11-27 19:57:58,101 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:57:58,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:57:58,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:57:58,104 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:57:58,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 19:57:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:57:58,204 INFO L256 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:57:58,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:57:58,224 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 7 [2024-11-27 19:57:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:57:58,371 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:57:58,371 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:57:58,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304097075] [2024-11-27 19:57:58,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304097075] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:57:58,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:57:58,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:57:58,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842172878] [2024-11-27 19:57:58,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:57:58,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:57:58,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:57:58,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:57:58,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:57:58,452 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:57:58,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:57:58,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:57:58,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:57:58,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:58:00,442 INFO L124 PetriNetUnfolderBase]: 5736/8837 cut-off events. [2024-11-27 19:58:00,443 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-27 19:58:00,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16872 conditions, 8837 events. 5736/8837 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 54923 event pairs, 5236 based on Foata normal form. 0/5203 useless extension candidates. Maximal degree in co-relation 16822. Up to 7891 conditions per place. [2024-11-27 19:58:00,523 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 51 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-11-27 19:58:00,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 272 flow [2024-11-27 19:58:00,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:58:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:58:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-11-27 19:58:00,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2024-11-27 19:58:00,527 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 130 flow. Second operand 4 states and 124 transitions. [2024-11-27 19:58:00,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 272 flow [2024-11-27 19:58:00,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 19:58:00,530 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 208 flow [2024-11-27 19:58:00,531 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2024-11-27 19:58:00,532 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, -5 predicate places. [2024-11-27 19:58:00,532 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 208 flow [2024-11-27 19:58:00,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:00,532 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:58:00,533 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 19:58:00,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 19:58:00,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:00,734 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:58:00,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 889209277, now seen corresponding path program 1 times [2024-11-27 19:58:00,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:00,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503957785] [2024-11-27 19:58:00,737 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:58:00,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:00,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:00,742 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:00,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 19:58:00,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:58:00,835 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:58:00,836 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:00,867 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 7 [2024-11-27 19:58:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:01,054 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:58:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:01,348 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503957785] [2024-11-27 19:58:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503957785] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:58:01,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:58:01,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-11-27 19:58:01,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711355526] [2024-11-27 19:58:01,349 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:58:01,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-27 19:58:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:01,350 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-27 19:58:01,350 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-27 19:58:01,468 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:58:01,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 208 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:01,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:58:01,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:58:01,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:58:04,998 INFO L124 PetriNetUnfolderBase]: 5745/8864 cut-off events. [2024-11-27 19:58:04,999 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-11-27 19:58:05,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16990 conditions, 8864 events. 5745/8864 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 55280 event pairs, 5236 based on Foata normal form. 0/5230 useless extension candidates. Maximal degree in co-relation 16836. Up to 7894 conditions per place. [2024-11-27 19:58:05,062 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 51 selfloop transitions, 37 changer transitions 0/96 dead transitions. [2024-11-27 19:58:05,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 504 flow [2024-11-27 19:58:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:58:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 19:58:05,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-11-27 19:58:05,066 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33835616438356164 [2024-11-27 19:58:05,066 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 208 flow. Second operand 10 states and 247 transitions. [2024-11-27 19:58:05,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 504 flow [2024-11-27 19:58:05,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 96 transitions, 504 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-27 19:58:05,075 INFO L231 Difference]: Finished difference. Result has 76 places, 96 transitions, 452 flow [2024-11-27 19:58:05,076 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=452, PETRI_PLACES=76, PETRI_TRANSITIONS=96} [2024-11-27 19:58:05,078 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-27 19:58:05,078 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 96 transitions, 452 flow [2024-11-27 19:58:05,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:05,079 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:58:05,080 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:05,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 19:58:05,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:05,280 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:58:05,281 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash 394411029, now seen corresponding path program 1 times [2024-11-27 19:58:05,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:05,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89470132] [2024-11-27 19:58:05,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:58:05,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:05,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:05,286 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:05,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 19:58:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:58:05,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-27 19:58:05,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:05,499 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:58:05,499 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:05,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89470132] [2024-11-27 19:58:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89470132] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:58:05,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:58:05,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 19:58:05,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068833467] [2024-11-27 19:58:05,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:58:05,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:58:05,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:05,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:58:05,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:58:05,547 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:58:05,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 96 transitions, 452 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:05,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:58:05,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:58:05,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:58:07,311 INFO L124 PetriNetUnfolderBase]: 5953/9247 cut-off events. [2024-11-27 19:58:07,311 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2024-11-27 19:58:07,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17871 conditions, 9247 events. 5953/9247 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 57657 event pairs, 5423 based on Foata normal form. 143/5702 useless extension candidates. Maximal degree in co-relation 17729. Up to 7920 conditions per place. [2024-11-27 19:58:07,367 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 128 selfloop transitions, 3 changer transitions 1/143 dead transitions. [2024-11-27 19:58:07,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 143 transitions, 961 flow [2024-11-27 19:58:07,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:58:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:58:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-27 19:58:07,369 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5342465753424658 [2024-11-27 19:58:07,369 INFO L175 Difference]: Start difference. First operand has 76 places, 96 transitions, 452 flow. Second operand 4 states and 156 transitions. [2024-11-27 19:58:07,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 143 transitions, 961 flow [2024-11-27 19:58:07,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 143 transitions, 805 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-11-27 19:58:07,380 INFO L231 Difference]: Finished difference. Result has 76 places, 96 transitions, 382 flow [2024-11-27 19:58:07,381 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=382, PETRI_PLACES=76, PETRI_TRANSITIONS=96} [2024-11-27 19:58:07,382 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-27 19:58:07,383 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 96 transitions, 382 flow [2024-11-27 19:58:07,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:07,383 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:58:07,383 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:07,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-27 19:58:07,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:07,584 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:58:07,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:07,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1653721912, now seen corresponding path program 1 times [2024-11-27 19:58:07,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:07,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721667347] [2024-11-27 19:58:07,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:58:07,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:07,589 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:07,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 19:58:07,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:58:07,691 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:58:07,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:07,745 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-27 19:58:07,746 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 21 treesize of output 20 [2024-11-27 19:58:07,780 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-27 19:58:07,780 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 20 [2024-11-27 19:58:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:07,810 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:58:07,810 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721667347] [2024-11-27 19:58:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721667347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:58:07,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:58:07,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:58:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997364468] [2024-11-27 19:58:07,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:58:07,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:58:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:07,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:58:07,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:58:07,857 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:58:07,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 96 transitions, 382 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:07,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:58:07,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:58:07,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:58:08,602 INFO L124 PetriNetUnfolderBase]: 4605/7298 cut-off events. [2024-11-27 19:58:08,602 INFO L125 PetriNetUnfolderBase]: For 566/566 co-relation queries the response was YES. [2024-11-27 19:58:08,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14988 conditions, 7298 events. 4605/7298 cut-off events. For 566/566 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 44319 event pairs, 4099 based on Foata normal form. 0/4767 useless extension candidates. Maximal degree in co-relation 14866. Up to 6262 conditions per place. [2024-11-27 19:58:08,641 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 71 selfloop transitions, 11 changer transitions 0/93 dead transitions. [2024-11-27 19:58:08,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 93 transitions, 534 flow [2024-11-27 19:58:08,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:58:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:58:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-27 19:58:08,643 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33972602739726027 [2024-11-27 19:58:08,644 INFO L175 Difference]: Start difference. First operand has 76 places, 96 transitions, 382 flow. Second operand 5 states and 124 transitions. [2024-11-27 19:58:08,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 93 transitions, 534 flow [2024-11-27 19:58:08,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 93 transitions, 530 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 19:58:08,648 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 388 flow [2024-11-27 19:58:08,649 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-11-27 19:58:08,650 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-27 19:58:08,650 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 388 flow [2024-11-27 19:58:08,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:08,650 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:58:08,650 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:58:08,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-27 19:58:08,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:08,855 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:58:08,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1653721911, now seen corresponding path program 1 times [2024-11-27 19:58:08,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:08,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152298387] [2024-11-27 19:58:08,856 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:58:08,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:08,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:08,858 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:08,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 19:58:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:58:08,981 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-27 19:58:08,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:09,021 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 7 [2024-11-27 19:58:09,031 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 7 [2024-11-27 19:58:09,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:58:09,294 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 16 treesize of output 11 [2024-11-27 19:58:09,329 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-27 19:58:09,329 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 21 treesize of output 20 [2024-11-27 19:58:09,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 19:58:09,429 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 16 treesize of output 11 [2024-11-27 19:58:09,443 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 19:58:09,443 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 13 treesize of output 13 [2024-11-27 19:58:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:09,565 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:58:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:11,986 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:11,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152298387] [2024-11-27 19:58:11,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152298387] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:58:11,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:58:11,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-11-27 19:58:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656718941] [2024-11-27 19:58:11,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:58:11,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-27 19:58:11,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:11,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-27 19:58:11,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-27 19:58:16,059 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:58:16,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 73 [2024-11-27 19:58:16,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 388 flow. Second operand has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:16,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:58:16,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 73 [2024-11-27 19:58:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:58:19,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:58:28,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:58:33,086 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:58:40,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-27 19:58:50,658 INFO L124 PetriNetUnfolderBase]: 10773/16850 cut-off events. [2024-11-27 19:58:50,658 INFO L125 PetriNetUnfolderBase]: For 1609/1609 co-relation queries the response was YES. [2024-11-27 19:58:50,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34369 conditions, 16850 events. 10773/16850 cut-off events. For 1609/1609 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 112200 event pairs, 9651 based on Foata normal form. 0/11421 useless extension candidates. Maximal degree in co-relation 33196. Up to 5963 conditions per place. [2024-11-27 19:58:50,754 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 141 selfloop transitions, 79 changer transitions 0/228 dead transitions. [2024-11-27 19:58:50,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 228 transitions, 1363 flow [2024-11-27 19:58:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-27 19:58:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-27 19:58:50,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 315 transitions. [2024-11-27 19:58:50,759 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3082191780821918 [2024-11-27 19:58:50,759 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 388 flow. Second operand 14 states and 315 transitions. [2024-11-27 19:58:50,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 228 transitions, 1363 flow [2024-11-27 19:58:50,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 228 transitions, 1336 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:58:50,768 INFO L231 Difference]: Finished difference. Result has 93 places, 142 transitions, 929 flow [2024-11-27 19:58:50,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=929, PETRI_PLACES=93, PETRI_TRANSITIONS=142} [2024-11-27 19:58:50,769 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 24 predicate places. [2024-11-27 19:58:50,772 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 142 transitions, 929 flow [2024-11-27 19:58:50,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.5) internal successors, (150), 12 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:50,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:58:50,773 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-27 19:58:50,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 19:58:50,977 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:50,977 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:58:50,978 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:58:50,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1934425980, now seen corresponding path program 2 times [2024-11-27 19:58:50,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:58:50,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685187039] [2024-11-27 19:58:50,978 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 19:58:50,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:58:50,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:58:50,980 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:58:50,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 19:58:51,069 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 19:58:51,069 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 19:58:51,072 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-27 19:58:51,073 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:58:51,110 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 7 [2024-11-27 19:58:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:51,780 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:58:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:58:53,065 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:58:53,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685187039] [2024-11-27 19:58:53,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685187039] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:58:53,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:58:53,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-11-27 19:58:53,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733724634] [2024-11-27 19:58:53,065 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:58:53,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-27 19:58:53,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:58:53,066 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-27 19:58:53,066 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-11-27 19:58:54,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:58:54,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 142 transitions, 929 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:58:54,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:58:54,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:58:54,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:00,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:02,018 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:04,347 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:05,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:07,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:09,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:11,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:14,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:17,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:19,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-27 19:59:23,076 INFO L124 PetriNetUnfolderBase]: 10933/17330 cut-off events. [2024-11-27 19:59:23,076 INFO L125 PetriNetUnfolderBase]: For 4714/4714 co-relation queries the response was YES. [2024-11-27 19:59:23,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36809 conditions, 17330 events. 10933/17330 cut-off events. For 4714/4714 co-relation queries the response was YES. Maximal size of possible extension queue 752. Compared 118075 event pairs, 9651 based on Foata normal form. 54/12409 useless extension candidates. Maximal degree in co-relation 36449. Up to 14873 conditions per place. [2024-11-27 19:59:23,148 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 57 selfloop transitions, 185 changer transitions 0/250 dead transitions. [2024-11-27 19:59:23,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 250 transitions, 2289 flow [2024-11-27 19:59:23,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 19:59:23,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-27 19:59:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 487 transitions. [2024-11-27 19:59:23,152 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30323785803237857 [2024-11-27 19:59:23,152 INFO L175 Difference]: Start difference. First operand has 93 places, 142 transitions, 929 flow. Second operand 22 states and 487 transitions. [2024-11-27 19:59:23,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 250 transitions, 2289 flow [2024-11-27 19:59:23,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 250 transitions, 2284 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 19:59:23,180 INFO L231 Difference]: Finished difference. Result has 119 places, 250 transitions, 2320 flow [2024-11-27 19:59:23,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2320, PETRI_PLACES=119, PETRI_TRANSITIONS=250} [2024-11-27 19:59:23,181 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 50 predicate places. [2024-11-27 19:59:23,181 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 250 transitions, 2320 flow [2024-11-27 19:59:23,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:23,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:59:23,181 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:23,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-27 19:59:23,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:23,382 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:59:23,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1800339578, now seen corresponding path program 1 times [2024-11-27 19:59:23,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:23,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990016661] [2024-11-27 19:59:23,383 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:59:23,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:23,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:23,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:23,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 19:59:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:23,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:59:23,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:59:23,667 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:59:23,667 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:23,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990016661] [2024-11-27 19:59:23,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990016661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:59:23,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:59:23,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:59:23,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456469650] [2024-11-27 19:59:23,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:59:23,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:59:23,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:23,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:59:23,668 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:59:23,709 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:59:23,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 250 transitions, 2320 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:23,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:23,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:59:23,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:26,013 INFO L124 PetriNetUnfolderBase]: 12107/19316 cut-off events. [2024-11-27 19:59:26,013 INFO L125 PetriNetUnfolderBase]: For 5811/5811 co-relation queries the response was YES. [2024-11-27 19:59:26,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42563 conditions, 19316 events. 12107/19316 cut-off events. For 5811/5811 co-relation queries the response was YES. Maximal size of possible extension queue 764. Compared 133178 event pairs, 10719 based on Foata normal form. 398/14607 useless extension candidates. Maximal degree in co-relation 41985. Up to 15072 conditions per place. [2024-11-27 19:59:26,109 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 322 selfloop transitions, 17 changer transitions 0/350 dead transitions. [2024-11-27 19:59:26,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 350 transitions, 3903 flow [2024-11-27 19:59:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:59:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:59:26,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-27 19:59:26,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-27 19:59:26,111 INFO L175 Difference]: Start difference. First operand has 119 places, 250 transitions, 2320 flow. Second operand 4 states and 152 transitions. [2024-11-27 19:59:26,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 350 transitions, 3903 flow [2024-11-27 19:59:26,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 350 transitions, 3227 flow, removed 214 selfloop flow, removed 9 redundant places. [2024-11-27 19:59:26,156 INFO L231 Difference]: Finished difference. Result has 114 places, 250 transitions, 1884 flow [2024-11-27 19:59:26,156 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1884, PETRI_PLACES=114, PETRI_TRANSITIONS=250} [2024-11-27 19:59:26,159 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 45 predicate places. [2024-11-27 19:59:26,160 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 250 transitions, 1884 flow [2024-11-27 19:59:26,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:26,161 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:59:26,161 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:26,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-27 19:59:26,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:26,361 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:59:26,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:26,362 INFO L85 PathProgramCache]: Analyzing trace with hash 274229287, now seen corresponding path program 1 times [2024-11-27 19:59:26,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:26,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837499713] [2024-11-27 19:59:26,362 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:59:26,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:26,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:26,364 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:26,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 19:59:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:26,452 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 19:59:26,453 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:26,460 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 7 [2024-11-27 19:59:26,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:59:26,525 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:59:26,525 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:26,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837499713] [2024-11-27 19:59:26,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837499713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:59:26,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:59:26,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:59:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787831443] [2024-11-27 19:59:26,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:59:26,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:59:26,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:26,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:59:26,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:59:26,603 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:59:26,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 250 transitions, 1884 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:26,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:26,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:59:26,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:29,068 INFO L124 PetriNetUnfolderBase]: 9969/16089 cut-off events. [2024-11-27 19:59:29,068 INFO L125 PetriNetUnfolderBase]: For 5605/5605 co-relation queries the response was YES. [2024-11-27 19:59:29,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38103 conditions, 16089 events. 9969/16089 cut-off events. For 5605/5605 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 108634 event pairs, 8703 based on Foata normal form. 0/12514 useless extension candidates. Maximal degree in co-relation 37601. Up to 13729 conditions per place. [2024-11-27 19:59:29,140 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 224 selfloop transitions, 13 changer transitions 0/248 dead transitions. [2024-11-27 19:59:29,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 248 transitions, 2354 flow [2024-11-27 19:59:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:59:29,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:59:29,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-27 19:59:29,141 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.363013698630137 [2024-11-27 19:59:29,141 INFO L175 Difference]: Start difference. First operand has 114 places, 250 transitions, 1884 flow. Second operand 4 states and 106 transitions. [2024-11-27 19:59:29,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 248 transitions, 2354 flow [2024-11-27 19:59:29,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 248 transitions, 2337 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-27 19:59:29,186 INFO L231 Difference]: Finished difference. Result has 114 places, 248 transitions, 1889 flow [2024-11-27 19:59:29,186 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1863, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1889, PETRI_PLACES=114, PETRI_TRANSITIONS=248} [2024-11-27 19:59:29,187 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 45 predicate places. [2024-11-27 19:59:29,187 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 248 transitions, 1889 flow [2024-11-27 19:59:29,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:29,187 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:59:29,187 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:29,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 19:59:29,388 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:29,388 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:59:29,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:29,388 INFO L85 PathProgramCache]: Analyzing trace with hash 274229288, now seen corresponding path program 1 times [2024-11-27 19:59:29,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:29,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483982063] [2024-11-27 19:59:29,389 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:59:29,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:29,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:29,390 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:29,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 19:59:29,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:29,478 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-27 19:59:29,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:59:29,603 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:59:29,604 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:29,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483982063] [2024-11-27 19:59:29,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483982063] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:59:29,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:59:29,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:59:29,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60375319] [2024-11-27 19:59:29,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:59:29,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:59:29,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:29,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:59:29,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:59:29,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:59:29,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 248 transitions, 1889 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:29,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:29,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:59:29,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:32,657 INFO L124 PetriNetUnfolderBase]: 14764/23893 cut-off events. [2024-11-27 19:59:32,657 INFO L125 PetriNetUnfolderBase]: For 8649/8649 co-relation queries the response was YES. [2024-11-27 19:59:32,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57389 conditions, 23893 events. 14764/23893 cut-off events. For 8649/8649 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 172103 event pairs, 13278 based on Foata normal form. 669/19566 useless extension candidates. Maximal degree in co-relation 56879. Up to 14012 conditions per place. [2024-11-27 19:59:32,792 INFO L140 encePairwiseOnDemand]: 66/73 looper letters, 235 selfloop transitions, 28 changer transitions 0/274 dead transitions. [2024-11-27 19:59:32,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 274 transitions, 2508 flow [2024-11-27 19:59:32,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 19:59:32,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 19:59:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-11-27 19:59:32,794 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5102739726027398 [2024-11-27 19:59:32,795 INFO L175 Difference]: Start difference. First operand has 114 places, 248 transitions, 1889 flow. Second operand 4 states and 149 transitions. [2024-11-27 19:59:32,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 274 transitions, 2508 flow [2024-11-27 19:59:32,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 274 transitions, 2452 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:59:32,870 INFO L231 Difference]: Finished difference. Result has 115 places, 248 transitions, 1899 flow [2024-11-27 19:59:32,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1899, PETRI_PLACES=115, PETRI_TRANSITIONS=248} [2024-11-27 19:59:32,870 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 46 predicate places. [2024-11-27 19:59:32,871 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 248 transitions, 1899 flow [2024-11-27 19:59:32,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:32,871 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:59:32,871 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:32,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 19:59:33,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:33,071 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:59:33,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1158288407, now seen corresponding path program 1 times [2024-11-27 19:59:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:33,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757825355] [2024-11-27 19:59:33,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:59:33,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:33,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:33,074 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:33,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 19:59:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:33,181 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 19:59:33,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:33,225 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 7 [2024-11-27 19:59:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:59:33,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:59:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:59:34,876 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:34,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757825355] [2024-11-27 19:59:34,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757825355] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 19:59:34,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 19:59:34,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-11-27 19:59:34,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329120697] [2024-11-27 19:59:34,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 19:59:34,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 19:59:34,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:34,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 19:59:34,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-27 19:59:35,799 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:59:35,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 248 transitions, 1899 flow. Second operand has 10 states, 10 states have (on average 17.0) internal successors, (170), 10 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:35,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:35,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:59:35,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:44,945 INFO L124 PetriNetUnfolderBase]: 30554/49323 cut-off events. [2024-11-27 19:59:44,945 INFO L125 PetriNetUnfolderBase]: For 18902/18902 co-relation queries the response was YES. [2024-11-27 19:59:45,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119221 conditions, 49323 events. 30554/49323 cut-off events. For 18902/18902 co-relation queries the response was YES. Maximal size of possible extension queue 1444. Compared 385253 event pairs, 27068 based on Foata normal form. 0/39851 useless extension candidates. Maximal degree in co-relation 118698. Up to 13829 conditions per place. [2024-11-27 19:59:45,405 INFO L140 encePairwiseOnDemand]: 63/73 looper letters, 155 selfloop transitions, 175 changer transitions 0/338 dead transitions. [2024-11-27 19:59:45,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 338 transitions, 2872 flow [2024-11-27 19:59:45,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 19:59:45,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-27 19:59:45,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 302 transitions. [2024-11-27 19:59:45,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4136986301369863 [2024-11-27 19:59:45,408 INFO L175 Difference]: Start difference. First operand has 115 places, 248 transitions, 1899 flow. Second operand 10 states and 302 transitions. [2024-11-27 19:59:45,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 338 transitions, 2872 flow [2024-11-27 19:59:45,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 338 transitions, 2846 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:59:45,536 INFO L231 Difference]: Finished difference. Result has 125 places, 248 transitions, 2234 flow [2024-11-27 19:59:45,536 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2234, PETRI_PLACES=125, PETRI_TRANSITIONS=248} [2024-11-27 19:59:45,537 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 56 predicate places. [2024-11-27 19:59:45,537 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 248 transitions, 2234 flow [2024-11-27 19:59:45,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.0) internal successors, (170), 10 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:45,537 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:59:45,537 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:45,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-27 19:59:45,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:45,738 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:59:45,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:45,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1972174255, now seen corresponding path program 1 times [2024-11-27 19:59:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:45,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1604643732] [2024-11-27 19:59:45,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:59:45,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:45,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:45,740 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:45,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 19:59:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:45,832 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 19:59:45,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:45,888 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-27 19:59:45,888 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 20 [2024-11-27 19:59:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:59:46,053 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 19:59:46,053 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:46,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604643732] [2024-11-27 19:59:46,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604643732] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 19:59:46,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 19:59:46,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 19:59:46,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447605650] [2024-11-27 19:59:46,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:59:46,054 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 19:59:46,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:46,054 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 19:59:46,054 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-27 19:59:46,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 19:59:46,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 248 transitions, 2234 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:46,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:46,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 19:59:46,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:51,112 INFO L124 PetriNetUnfolderBase]: 23812/39056 cut-off events. [2024-11-27 19:59:51,112 INFO L125 PetriNetUnfolderBase]: For 19326/19326 co-relation queries the response was YES. [2024-11-27 19:59:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95241 conditions, 39056 events. 23812/39056 cut-off events. For 19326/19326 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 301349 event pairs, 20934 based on Foata normal form. 0/34217 useless extension candidates. Maximal degree in co-relation 94673. Up to 33486 conditions per place. [2024-11-27 19:59:51,318 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 199 selfloop transitions, 36 changer transitions 0/246 dead transitions. [2024-11-27 19:59:51,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 246 transitions, 2696 flow [2024-11-27 19:59:51,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-27 19:59:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-27 19:59:51,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-11-27 19:59:51,320 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32602739726027397 [2024-11-27 19:59:51,320 INFO L175 Difference]: Start difference. First operand has 125 places, 248 transitions, 2234 flow. Second operand 5 states and 119 transitions. [2024-11-27 19:59:51,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 246 transitions, 2696 flow [2024-11-27 19:59:51,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 246 transitions, 2668 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 19:59:51,478 INFO L231 Difference]: Finished difference. Result has 126 places, 246 transitions, 2270 flow [2024-11-27 19:59:51,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2270, PETRI_PLACES=126, PETRI_TRANSITIONS=246} [2024-11-27 19:59:51,479 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 57 predicate places. [2024-11-27 19:59:51,479 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 246 transitions, 2270 flow [2024-11-27 19:59:51,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:51,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:59:51,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:51,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 19:59:51,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:51,679 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:59:51,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:51,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1972174254, now seen corresponding path program 1 times [2024-11-27 19:59:51,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:51,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720818509] [2024-11-27 19:59:51,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:59:51,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:51,684 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:51,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 19:59:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:51,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:59:51,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 19:59:52,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:59:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:59:52,348 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:52,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720818509] [2024-11-27 19:59:52,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720818509] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:59:52,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:59:52,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-27 19:59:52,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415985230] [2024-11-27 19:59:52,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:59:52,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:59:52,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:52,349 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:59:52,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:59:52,349 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:59:52,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 246 transitions, 2270 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:52,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:52,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:59:52,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 19:59:56,795 INFO L124 PetriNetUnfolderBase]: 22784/37360 cut-off events. [2024-11-27 19:59:56,795 INFO L125 PetriNetUnfolderBase]: For 20509/20509 co-relation queries the response was YES. [2024-11-27 19:59:56,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94336 conditions, 37360 events. 22784/37360 cut-off events. For 20509/20509 co-relation queries the response was YES. Maximal size of possible extension queue 1072. Compared 289021 event pairs, 10479 based on Foata normal form. 908/33267 useless extension candidates. Maximal degree in co-relation 93759. Up to 19586 conditions per place. [2024-11-27 19:59:56,990 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 252 selfloop transitions, 2 changer transitions 0/265 dead transitions. [2024-11-27 19:59:56,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 265 transitions, 2854 flow [2024-11-27 19:59:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 19:59:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 19:59:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 117 transitions. [2024-11-27 19:59:56,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5342465753424658 [2024-11-27 19:59:56,991 INFO L175 Difference]: Start difference. First operand has 126 places, 246 transitions, 2270 flow. Second operand 3 states and 117 transitions. [2024-11-27 19:59:56,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 265 transitions, 2854 flow [2024-11-27 19:59:57,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 265 transitions, 2794 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-27 19:59:57,069 INFO L231 Difference]: Finished difference. Result has 126 places, 247 transitions, 2226 flow [2024-11-27 19:59:57,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2226, PETRI_PLACES=126, PETRI_TRANSITIONS=247} [2024-11-27 19:59:57,070 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 57 predicate places. [2024-11-27 19:59:57,070 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 247 transitions, 2226 flow [2024-11-27 19:59:57,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:57,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 19:59:57,070 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 19:59:57,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-27 19:59:57,270 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:57,271 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 19:59:57,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 19:59:57,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1716058786, now seen corresponding path program 1 times [2024-11-27 19:59:57,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 19:59:57,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833957310] [2024-11-27 19:59:57,271 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 19:59:57,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 19:59:57,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 19:59:57,273 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 19:59:57,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 19:59:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 19:59:57,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-27 19:59:57,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 19:59:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 19:59:57,726 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 19:59:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-27 19:59:58,061 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 19:59:58,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833957310] [2024-11-27 19:59:58,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833957310] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-27 19:59:58,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 19:59:58,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-27 19:59:58,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273335600] [2024-11-27 19:59:58,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 19:59:58,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 19:59:58,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 19:59:58,062 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 19:59:58,062 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-27 19:59:58,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-27 19:59:58,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 247 transitions, 2226 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 19:59:58,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 19:59:58,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-27 19:59:58,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:00:02,262 INFO L124 PetriNetUnfolderBase]: 20299/33585 cut-off events. [2024-11-27 20:00:02,262 INFO L125 PetriNetUnfolderBase]: For 21825/22017 co-relation queries the response was YES. [2024-11-27 20:00:02,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88488 conditions, 33585 events. 20299/33585 cut-off events. For 21825/22017 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 253976 event pairs, 8564 based on Foata normal form. 768/31795 useless extension candidates. Maximal degree in co-relation 87914. Up to 26459 conditions per place. [2024-11-27 20:00:02,462 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 245 selfloop transitions, 3 changer transitions 0/259 dead transitions. [2024-11-27 20:00:02,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 259 transitions, 2764 flow [2024-11-27 20:00:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 20:00:02,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 20:00:02,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-11-27 20:00:02,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.502283105022831 [2024-11-27 20:00:02,464 INFO L175 Difference]: Start difference. First operand has 126 places, 247 transitions, 2226 flow. Second operand 3 states and 110 transitions. [2024-11-27 20:00:02,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 259 transitions, 2764 flow [2024-11-27 20:00:02,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 259 transitions, 2762 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-27 20:00:02,578 INFO L231 Difference]: Finished difference. Result has 128 places, 249 transitions, 2249 flow [2024-11-27 20:00:02,578 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=2224, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2249, PETRI_PLACES=128, PETRI_TRANSITIONS=249} [2024-11-27 20:00:02,579 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 59 predicate places. [2024-11-27 20:00:02,579 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 249 transitions, 2249 flow [2024-11-27 20:00:02,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:00:02,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:00:02,580 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:00:02,587 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 20:00:02,780 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:02,780 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 20:00:02,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:00:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -782853534, now seen corresponding path program 2 times [2024-11-27 20:00:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:00:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395679337] [2024-11-27 20:00:02,781 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 20:00:02,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:02,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:00:02,783 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:00:02,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 20:00:02,892 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-27 20:00:02,892 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 20:00:02,894 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-27 20:00:02,896 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:00:02,926 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 7 [2024-11-27 20:00:02,948 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 7 [2024-11-27 20:00:03,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:00:03,271 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 16 treesize of output 11 [2024-11-27 20:00:03,343 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-11-27 20:00:03,344 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 21 treesize of output 20 [2024-11-27 20:00:03,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:00:03,441 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 16 treesize of output 11 [2024-11-27 20:00:03,483 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 20:00:03,484 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 13 treesize of output 13 [2024-11-27 20:00:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-27 20:00:03,630 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 20:00:03,630 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:00:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395679337] [2024-11-27 20:00:03,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395679337] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 20:00:03,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 20:00:03,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 20:00:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878634543] [2024-11-27 20:00:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 20:00:03,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-27 20:00:03,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:00:03,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-27 20:00:03,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-27 20:00:03,705 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 73 [2024-11-27 20:00:03,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 249 transitions, 2249 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:00:03,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:00:03,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 73 [2024-11-27 20:00:03,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:00:07,797 INFO L124 PetriNetUnfolderBase]: 16973/28378 cut-off events. [2024-11-27 20:00:07,797 INFO L125 PetriNetUnfolderBase]: For 29161/29161 co-relation queries the response was YES. [2024-11-27 20:00:07,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75985 conditions, 28378 events. 16973/28378 cut-off events. For 29161/29161 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 211826 event pairs, 13486 based on Foata normal form. 1351/27602 useless extension candidates. Maximal degree in co-relation 75410. Up to 25407 conditions per place. [2024-11-27 20:00:07,945 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 223 selfloop transitions, 12 changer transitions 0/246 dead transitions. [2024-11-27 20:00:07,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 246 transitions, 2693 flow [2024-11-27 20:00:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 20:00:07,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-27 20:00:07,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-27 20:00:07,946 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3493150684931507 [2024-11-27 20:00:07,946 INFO L175 Difference]: Start difference. First operand has 128 places, 249 transitions, 2249 flow. Second operand 4 states and 102 transitions. [2024-11-27 20:00:07,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 246 transitions, 2693 flow [2024-11-27 20:00:07,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 246 transitions, 2684 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-27 20:00:07,987 INFO L231 Difference]: Finished difference. Result has 127 places, 246 transitions, 2238 flow [2024-11-27 20:00:07,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=2214, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2238, PETRI_PLACES=127, PETRI_TRANSITIONS=246} [2024-11-27 20:00:07,987 INFO L279 CegarLoopForPetriNet]: 69 programPoint places, 58 predicate places. [2024-11-27 20:00:07,988 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 246 transitions, 2238 flow [2024-11-27 20:00:07,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:00:07,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 20:00:07,988 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 20:00:07,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-27 20:00:08,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:08,188 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-27 20:00:08,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 20:00:08,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1554870094, now seen corresponding path program 1 times [2024-11-27 20:00:08,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-11-27 20:00:08,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920714449] [2024-11-27 20:00:08,189 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 20:00:08,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 20:00:08,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 20:00:08,191 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 20:00:08,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ee19edec-50ad-4166-8246-30823b4f9fbf/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-27 20:00:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 20:00:08,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 20:00:08,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 20:00:08,341 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 7 [2024-11-27 20:00:08,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 20:00:08,669 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 16 treesize of output 11 [2024-11-27 20:00:08,707 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-11-27 20:00:08,707 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 13 treesize of output 13 [2024-11-27 20:00:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:00:09,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 20:00:10,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 20:00:10,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 89 [2024-11-27 20:00:11,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 20:00:11,156 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-11-27 20:00:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920714449] [2024-11-27 20:00:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920714449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 20:00:11,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 20:00:11,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-11-27 20:00:11,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224799566] [2024-11-27 20:00:11,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 20:00:11,157 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 20:00:11,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-11-27 20:00:11,158 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 20:00:11,158 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-27 20:00:12,484 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 73 [2024-11-27 20:00:12,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 246 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 20:00:12,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 20:00:12,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 73 [2024-11-27 20:00:12,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 20:00:21,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1]