./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-24 00:43:00,048 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-24 00:43:00,166 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-24 00:43:00,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-24 00:43:00,173 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-24 00:43:00,219 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-24 00:43:00,220 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-24 00:43:00,220 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-24 00:43:00,221 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-24 00:43:00,222 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-24 00:43:00,223 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-24 00:43:00,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-24 00:43:00,224 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-24 00:43:00,224 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-24 00:43:00,225 INFO L153 SettingsManager]: * Use SBE=true [2024-11-24 00:43:00,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-24 00:43:00,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-24 00:43:00,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-24 00:43:00,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-24 00:43:00,226 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-24 00:43:00,226 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-24 00:43:00,226 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-24 00:43:00,226 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-24 00:43:00,227 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-24 00:43:00,227 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-24 00:43:00,227 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-24 00:43:00,227 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-24 00:43:00,227 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-24 00:43:00,227 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-24 00:43:00,227 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-24 00:43:00,228 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:43:00,228 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:43:00,228 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:43:00,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:43:00,229 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-24 00:43:00,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-24 00:43:00,229 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-24 00:43:00,229 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-24 00:43:00,229 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:43:00,230 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-24 00:43:00,230 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-24 00:43:00,230 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-24 00:43:00,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-24 00:43:00,230 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-24 00:43:00,231 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-24 00:43:00,231 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-24 00:43:00,231 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-24 00:43:00,231 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_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63e73d2abe89b782ca9e5c579baa72b5461ffc3c60c322f6f03d18cdd5548702 [2024-11-24 00:43:00,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-24 00:43:00,671 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-24 00:43:00,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-24 00:43:00,678 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-24 00:43:00,678 INFO L274 PluginConnector]: CDTParser initialized [2024-11-24 00:43:00,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2024-11-24 00:43:04,068 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/data/6a84c913c/5b7f9228ba7843b9b054e67310e81222/FLAG5edc6b52c [2024-11-24 00:43:04,444 INFO L384 CDTParser]: Found 1 translation units. [2024-11-24 00:43:04,445 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/sv-benchmarks/c/weaver/popl20-more-vector-add.wvr.c [2024-11-24 00:43:04,459 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/data/6a84c913c/5b7f9228ba7843b9b054e67310e81222/FLAG5edc6b52c [2024-11-24 00:43:04,494 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/data/6a84c913c/5b7f9228ba7843b9b054e67310e81222 [2024-11-24 00:43:04,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-24 00:43:04,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-24 00:43:04,503 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-24 00:43:04,503 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-24 00:43:04,510 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-24 00:43:04,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@279c6473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04, skipping insertion in model container [2024-11-24 00:43:04,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,541 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-24 00:43:04,781 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-24 00:43:04,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:43:04,795 INFO L200 MainTranslator]: Completed pre-run [2024-11-24 00:43:04,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-24 00:43:04,841 INFO L204 MainTranslator]: Completed translation [2024-11-24 00:43:04,842 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04 WrapperNode [2024-11-24 00:43:04,842 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-24 00:43:04,843 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-24 00:43:04,843 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-24 00:43:04,844 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-24 00:43:04,851 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,861 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,889 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 12, calls inlined = 18, statements flattened = 183 [2024-11-24 00:43:04,890 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-24 00:43:04,890 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-24 00:43:04,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-24 00:43:04,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-24 00:43:04,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,906 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,927 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 7 writes are split as follows [0, 7]. [2024-11-24 00:43:04,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,937 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,939 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,944 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,948 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-24 00:43:04,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-24 00:43:04,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-24 00:43:04,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-24 00:43:04,957 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (1/1) ... [2024-11-24 00:43:04,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-24 00:43:04,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:05,008 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-24 00:43:05,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-24 00:43:05,041 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-24 00:43:05,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-24 00:43:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-24 00:43:05,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-24 00:43:05,041 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-24 00:43:05,041 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-24 00:43:05,042 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-24 00:43:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-24 00:43:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-24 00:43:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-24 00:43:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-24 00:43:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-24 00:43:05,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-24 00:43:05,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-24 00:43:05,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-24 00:43:05,043 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-24 00:43:05,044 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-24 00:43:05,169 INFO L234 CfgBuilder]: Building ICFG [2024-11-24 00:43:05,171 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-24 00:43:06,041 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-24 00:43:06,042 INFO L283 CfgBuilder]: Performing block encoding [2024-11-24 00:43:06,572 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-24 00:43:06,572 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-11-24 00:43:06,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:43:06 BoogieIcfgContainer [2024-11-24 00:43:06,573 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-24 00:43:06,576 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-24 00:43:06,576 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-24 00:43:06,582 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-24 00:43:06,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 12:43:04" (1/3) ... [2024-11-24 00:43:06,583 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b7073d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:43:06, skipping insertion in model container [2024-11-24 00:43:06,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 12:43:04" (2/3) ... [2024-11-24 00:43:06,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59b7073d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 12:43:06, skipping insertion in model container [2024-11-24 00:43:06,585 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 12:43:06" (3/3) ... [2024-11-24 00:43:06,587 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-vector-add.wvr.c [2024-11-24 00:43:06,606 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-24 00:43:06,608 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-vector-add.wvr.c that has 4 procedures, 74 locations, 1 initial locations, 7 loop locations, and 32 error locations. [2024-11-24 00:43:06,609 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-24 00:43:06,744 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-24 00:43:06,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 181 flow [2024-11-24 00:43:06,879 INFO L124 PetriNetUnfolderBase]: 7/77 cut-off events. [2024-11-24 00:43:06,883 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 00:43:06,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 77 events. 7/77 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 218 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2024-11-24 00:43:06,891 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 80 transitions, 181 flow [2024-11-24 00:43:06,896 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 79 places, 76 transitions, 170 flow [2024-11-24 00:43:06,909 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-24 00:43:06,929 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;@3d9919b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-24 00:43:06,932 INFO L334 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2024-11-24 00:43:06,940 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-24 00:43:06,940 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-24 00:43:06,940 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-24 00:43:06,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:06,941 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 00:43:06,942 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:06,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash 756213, now seen corresponding path program 1 times [2024-11-24 00:43:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:06,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822132086] [2024-11-24 00:43:06,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:06,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:07,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:07,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:07,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822132086] [2024-11-24 00:43:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822132086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:07,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:07,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-24 00:43:07,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196536637] [2024-11-24 00:43:07,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:07,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-24 00:43:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:07,393 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-24 00:43:07,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-24 00:43:07,493 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-24 00:43:07,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:07,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:07,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-24 00:43:07,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:07,802 INFO L124 PetriNetUnfolderBase]: 203/468 cut-off events. [2024-11-24 00:43:07,802 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-24 00:43:07,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 817 conditions, 468 events. 203/468 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2280 event pairs, 124 based on Foata normal form. 1/342 useless extension candidates. Maximal degree in co-relation 687. Up to 294 conditions per place. [2024-11-24 00:43:07,814 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 31 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-11-24 00:43:07,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 70 transitions, 224 flow [2024-11-24 00:43:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-24 00:43:07,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-24 00:43:07,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 161 transitions. [2024-11-24 00:43:07,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-11-24 00:43:07,833 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 170 flow. Second operand 3 states and 161 transitions. [2024-11-24 00:43:07,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 70 transitions, 224 flow [2024-11-24 00:43:07,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 70 transitions, 212 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 00:43:07,843 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 150 flow [2024-11-24 00:43:07,846 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-24 00:43:07,850 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -10 predicate places. [2024-11-24 00:43:07,851 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 150 flow [2024-11-24 00:43:07,851 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:07,851 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:07,851 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-24 00:43:07,851 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-24 00:43:07,852 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:07,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:07,852 INFO L85 PathProgramCache]: Analyzing trace with hash 756214, now seen corresponding path program 1 times [2024-11-24 00:43:07,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:07,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200598269] [2024-11-24 00:43:07,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:07,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200598269] [2024-11-24 00:43:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200598269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:08,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:08,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-24 00:43:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404366479] [2024-11-24 00:43:08,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:08,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:43:08,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:08,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:43:08,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:43:08,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-24 00:43:08,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:08,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:08,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-24 00:43:08,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:08,899 INFO L124 PetriNetUnfolderBase]: 204/471 cut-off events. [2024-11-24 00:43:08,900 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 00:43:08,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 801 conditions, 471 events. 204/471 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2280 event pairs, 124 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 756. Up to 311 conditions per place. [2024-11-24 00:43:08,907 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 36 selfloop transitions, 4 changer transitions 0/73 dead transitions. [2024-11-24 00:43:08,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 73 transitions, 236 flow [2024-11-24 00:43:08,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:43:08,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:43:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2024-11-24 00:43:08,913 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-11-24 00:43:08,913 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 150 flow. Second operand 4 states and 205 transitions. [2024-11-24 00:43:08,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 73 transitions, 236 flow [2024-11-24 00:43:08,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 73 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:43:08,919 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 173 flow [2024-11-24 00:43:08,922 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-11-24 00:43:08,922 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -7 predicate places. [2024-11-24 00:43:08,923 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 173 flow [2024-11-24 00:43:08,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 4 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:08,923 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:08,923 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-24 00:43:08,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-24 00:43:08,923 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:08,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:08,924 INFO L85 PathProgramCache]: Analyzing trace with hash 23445497, now seen corresponding path program 1 times [2024-11-24 00:43:08,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:08,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164388746] [2024-11-24 00:43:08,925 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:08,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:09,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:09,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164388746] [2024-11-24 00:43:09,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164388746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:09,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:09,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:43:09,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113148184] [2024-11-24 00:43:09,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:09,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:43:09,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:09,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:43:09,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:43:09,189 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2024-11-24 00:43:09,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:09,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:09,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2024-11-24 00:43:09,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:09,509 INFO L124 PetriNetUnfolderBase]: 207/486 cut-off events. [2024-11-24 00:43:09,509 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-24 00:43:09,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 486 events. 207/486 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2394 event pairs, 124 based on Foata normal form. 0/356 useless extension candidates. Maximal degree in co-relation 769. Up to 308 conditions per place. [2024-11-24 00:43:09,519 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 35 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-24 00:43:09,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 293 flow [2024-11-24 00:43:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:43:09,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:43:09,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 231 transitions. [2024-11-24 00:43:09,522 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.721875 [2024-11-24 00:43:09,522 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 173 flow. Second operand 4 states and 231 transitions. [2024-11-24 00:43:09,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 293 flow [2024-11-24 00:43:09,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 290 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:43:09,526 INFO L231 Difference]: Finished difference. Result has 76 places, 82 transitions, 248 flow [2024-11-24 00:43:09,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=76, PETRI_TRANSITIONS=82} [2024-11-24 00:43:09,528 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, -3 predicate places. [2024-11-24 00:43:09,528 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 82 transitions, 248 flow [2024-11-24 00:43:09,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:09,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:09,528 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-24 00:43:09,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-24 00:43:09,529 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:09,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:09,529 INFO L85 PathProgramCache]: Analyzing trace with hash 726745586, now seen corresponding path program 1 times [2024-11-24 00:43:09,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:09,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575694929] [2024-11-24 00:43:09,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:09,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:09,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:09,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:09,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575694929] [2024-11-24 00:43:09,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575694929] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:09,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174717061] [2024-11-24 00:43:09,979 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:09,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:09,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:09,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:09,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-24 00:43:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:10,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-24 00:43:10,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:10,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:43:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:10,456 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:10,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174717061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:10,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:10,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-24 00:43:10,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544020262] [2024-11-24 00:43:10,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:10,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-24 00:43:10,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:10,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-24 00:43:10,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-24 00:43:11,652 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-24 00:43:11,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 82 transitions, 248 flow. Second operand has 11 states, 11 states have (on average 42.36363636363637) internal successors, (466), 11 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:11,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:11,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-24 00:43:11,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:12,265 INFO L124 PetriNetUnfolderBase]: 208/488 cut-off events. [2024-11-24 00:43:12,265 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-24 00:43:12,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 883 conditions, 488 events. 208/488 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2432 event pairs, 124 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 775. Up to 323 conditions per place. [2024-11-24 00:43:12,274 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 41 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2024-11-24 00:43:12,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 361 flow [2024-11-24 00:43:12,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:43:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:43:12,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 372 transitions. [2024-11-24 00:43:12,277 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-11-24 00:43:12,278 INFO L175 Difference]: Start difference. First operand has 76 places, 82 transitions, 248 flow. Second operand 8 states and 372 transitions. [2024-11-24 00:43:12,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 361 flow [2024-11-24 00:43:12,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 361 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-24 00:43:12,287 INFO L231 Difference]: Finished difference. Result has 82 places, 84 transitions, 279 flow [2024-11-24 00:43:12,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=279, PETRI_PLACES=82, PETRI_TRANSITIONS=84} [2024-11-24 00:43:12,289 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 3 predicate places. [2024-11-24 00:43:12,290 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 84 transitions, 279 flow [2024-11-24 00:43:12,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 42.36363636363637) internal successors, (466), 11 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:12,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:12,292 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-24 00:43:12,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-24 00:43:12,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:12,497 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:12,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:12,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1054279549, now seen corresponding path program 1 times [2024-11-24 00:43:12,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:12,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356051432] [2024-11-24 00:43:12,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:12,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:12,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:12,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:12,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:12,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356051432] [2024-11-24 00:43:12,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356051432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:12,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875442610] [2024-11-24 00:43:12,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:12,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:12,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:12,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:12,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-24 00:43:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:12,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-24 00:43:12,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:12,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:43:13,109 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:43:13,110 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 32 treesize of output 27 [2024-11-24 00:43:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:13,149 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:13,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875442610] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:13,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:43:13,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-24 00:43:13,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885895185] [2024-11-24 00:43:13,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:13,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:13,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:13,265 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:13,266 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:43:13,413 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-24 00:43:13,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 84 transitions, 279 flow. Second operand has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:13,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:13,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-24 00:43:13,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:13,813 INFO L124 PetriNetUnfolderBase]: 406/938 cut-off events. [2024-11-24 00:43:13,813 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-24 00:43:13,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1651 conditions, 938 events. 406/938 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5514 event pairs, 248 based on Foata normal form. 3/706 useless extension candidates. Maximal degree in co-relation 838. Up to 312 conditions per place. [2024-11-24 00:43:13,823 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 64 selfloop transitions, 12 changer transitions 0/109 dead transitions. [2024-11-24 00:43:13,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 109 transitions, 498 flow [2024-11-24 00:43:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:43:13,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:43:13,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2024-11-24 00:43:13,825 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6975 [2024-11-24 00:43:13,825 INFO L175 Difference]: Start difference. First operand has 82 places, 84 transitions, 279 flow. Second operand 5 states and 279 transitions. [2024-11-24 00:43:13,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 109 transitions, 498 flow [2024-11-24 00:43:13,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 456 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-24 00:43:13,831 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 281 flow [2024-11-24 00:43:13,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=281, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-11-24 00:43:13,832 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 1 predicate places. [2024-11-24 00:43:13,832 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 281 flow [2024-11-24 00:43:13,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.2) internal successors, (211), 5 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:13,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:13,835 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:13,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:14,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:14,036 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:14,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:14,036 INFO L85 PathProgramCache]: Analyzing trace with hash -449610301, now seen corresponding path program 1 times [2024-11-24 00:43:14,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:14,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066128658] [2024-11-24 00:43:14,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:14,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:14,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066128658] [2024-11-24 00:43:14,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066128658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:14,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126185465] [2024-11-24 00:43:14,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:14,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:14,202 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:14,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-24 00:43:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:14,292 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 00:43:14,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:14,398 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:14,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:14,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126185465] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:14,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:14,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-24 00:43:14,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686809779] [2024-11-24 00:43:14,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:14,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-24 00:43:14,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:14,480 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-24 00:43:14,480 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:43:14,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 80 [2024-11-24 00:43:14,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 281 flow. Second operand has 13 states, 13 states have (on average 46.53846153846154) internal successors, (605), 13 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:14,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:14,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 80 [2024-11-24 00:43:14,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:15,283 INFO L124 PetriNetUnfolderBase]: 610/1413 cut-off events. [2024-11-24 00:43:15,283 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-24 00:43:15,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2489 conditions, 1413 events. 610/1413 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7815 event pairs, 372 based on Foata normal form. 3/1058 useless extension candidates. Maximal degree in co-relation 790. Up to 590 conditions per place. [2024-11-24 00:43:15,294 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 54 selfloop transitions, 39 changer transitions 0/129 dead transitions. [2024-11-24 00:43:15,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 129 transitions, 645 flow [2024-11-24 00:43:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:43:15,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:43:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 500 transitions. [2024-11-24 00:43:15,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6944444444444444 [2024-11-24 00:43:15,297 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 281 flow. Second operand 9 states and 500 transitions. [2024-11-24 00:43:15,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 129 transitions, 645 flow [2024-11-24 00:43:15,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 129 transitions, 643 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:43:15,302 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 501 flow [2024-11-24 00:43:15,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=501, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2024-11-24 00:43:15,303 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 10 predicate places. [2024-11-24 00:43:15,303 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 501 flow [2024-11-24 00:43:15,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 46.53846153846154) internal successors, (605), 13 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:15,304 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:15,304 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:15,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:15,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-24 00:43:15,508 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:15,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:15,509 INFO L85 PathProgramCache]: Analyzing trace with hash 328370557, now seen corresponding path program 1 times [2024-11-24 00:43:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:15,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964014287] [2024-11-24 00:43:15,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:15,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:15,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:15,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964014287] [2024-11-24 00:43:15,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964014287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:15,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:15,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:43:15,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363384836] [2024-11-24 00:43:15,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:15,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:15,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:15,659 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:15,659 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:43:15,713 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:43:15,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 501 flow. Second operand has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:15,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:15,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:43:15,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:16,181 INFO L124 PetriNetUnfolderBase]: 874/1942 cut-off events. [2024-11-24 00:43:16,182 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-24 00:43:16,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1942 events. 874/1942 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 11020 event pairs, 496 based on Foata normal form. 2/1438 useless extension candidates. Maximal degree in co-relation 1335. Up to 781 conditions per place. [2024-11-24 00:43:16,202 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 71 selfloop transitions, 27 changer transitions 1/134 dead transitions. [2024-11-24 00:43:16,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 134 transitions, 787 flow [2024-11-24 00:43:16,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:43:16,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:43:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 343 transitions. [2024-11-24 00:43:16,209 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7145833333333333 [2024-11-24 00:43:16,209 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 501 flow. Second operand 6 states and 343 transitions. [2024-11-24 00:43:16,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 134 transitions, 787 flow [2024-11-24 00:43:16,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 690 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-11-24 00:43:16,219 INFO L231 Difference]: Finished difference. Result has 92 places, 105 transitions, 478 flow [2024-11-24 00:43:16,220 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=92, PETRI_TRANSITIONS=105} [2024-11-24 00:43:16,222 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2024-11-24 00:43:16,223 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 105 transitions, 478 flow [2024-11-24 00:43:16,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.6) internal successors, (228), 5 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:16,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:16,223 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-24 00:43:16,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-24 00:43:16,223 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:16,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:16,226 INFO L85 PathProgramCache]: Analyzing trace with hash -236100793, now seen corresponding path program 2 times [2024-11-24 00:43:16,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:16,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088110826] [2024-11-24 00:43:16,226 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:43:16,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:16,254 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:43:16,254 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:43:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:43:16,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088110826] [2024-11-24 00:43:16,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088110826] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:16,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543348830] [2024-11-24 00:43:16,519 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:43:16,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:16,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:16,522 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:16,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-24 00:43:16,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:43:16,619 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:43:16,620 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-24 00:43:16,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:16,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:43:16,813 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-24 00:43:16,814 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 32 treesize of output 27 [2024-11-24 00:43:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:43:16,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:43:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543348830] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:17,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:17,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-24 00:43:17,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805588914] [2024-11-24 00:43:17,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:17,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 00:43:17,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:17,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 00:43:17,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2024-11-24 00:43:18,951 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 80 [2024-11-24 00:43:18,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 105 transitions, 478 flow. Second operand has 16 states, 16 states have (on average 42.75) internal successors, (684), 16 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:18,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:18,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 80 [2024-11-24 00:43:18,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:20,232 INFO L124 PetriNetUnfolderBase]: 750/1874 cut-off events. [2024-11-24 00:43:20,232 INFO L125 PetriNetUnfolderBase]: For 433/457 co-relation queries the response was YES. [2024-11-24 00:43:20,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3558 conditions, 1874 events. 750/1874 cut-off events. For 433/457 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 11927 event pairs, 496 based on Foata normal form. 12/1379 useless extension candidates. Maximal degree in co-relation 1625. Up to 825 conditions per place. [2024-11-24 00:43:20,248 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 53 selfloop transitions, 36 changer transitions 0/122 dead transitions. [2024-11-24 00:43:20,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 122 transitions, 698 flow [2024-11-24 00:43:20,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:43:20,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 00:43:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 505 transitions. [2024-11-24 00:43:20,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-11-24 00:43:20,252 INFO L175 Difference]: Start difference. First operand has 92 places, 105 transitions, 478 flow. Second operand 10 states and 505 transitions. [2024-11-24 00:43:20,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 122 transitions, 698 flow [2024-11-24 00:43:20,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 122 transitions, 647 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 00:43:20,259 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 482 flow [2024-11-24 00:43:20,259 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=482, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-24 00:43:20,260 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 16 predicate places. [2024-11-24 00:43:20,260 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 482 flow [2024-11-24 00:43:20,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 42.75) internal successors, (684), 16 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:20,261 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:20,261 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:20,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:20,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:20,465 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:20,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1996699801, now seen corresponding path program 1 times [2024-11-24 00:43:20,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:20,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899774372] [2024-11-24 00:43:20,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:20,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:20,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:20,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899774372] [2024-11-24 00:43:20,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899774372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:20,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:20,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:43:20,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030157468] [2024-11-24 00:43:20,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:20,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:43:20,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:20,633 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:43:20,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:43:20,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:43:20,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 482 flow. Second operand has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:20,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:20,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:43:20,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:21,157 INFO L124 PetriNetUnfolderBase]: 822/1802 cut-off events. [2024-11-24 00:43:21,158 INFO L125 PetriNetUnfolderBase]: For 499/561 co-relation queries the response was YES. [2024-11-24 00:43:21,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3650 conditions, 1802 events. 822/1802 cut-off events. For 499/561 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 10096 event pairs, 496 based on Foata normal form. 0/1353 useless extension candidates. Maximal degree in co-relation 1589. Up to 790 conditions per place. [2024-11-24 00:43:21,178 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 68 selfloop transitions, 22 changer transitions 3/125 dead transitions. [2024-11-24 00:43:21,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 125 transitions, 760 flow [2024-11-24 00:43:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:43:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:43:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 339 transitions. [2024-11-24 00:43:21,180 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.70625 [2024-11-24 00:43:21,180 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 482 flow. Second operand 6 states and 339 transitions. [2024-11-24 00:43:21,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 125 transitions, 760 flow [2024-11-24 00:43:21,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 125 transitions, 663 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-11-24 00:43:21,187 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 452 flow [2024-11-24 00:43:21,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-11-24 00:43:21,189 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 16 predicate places. [2024-11-24 00:43:21,190 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 452 flow [2024-11-24 00:43:21,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 45.666666666666664) internal successors, (274), 6 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:21,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:21,191 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:21,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-24 00:43:21,191 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:21,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:21,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1033130145, now seen corresponding path program 1 times [2024-11-24 00:43:21,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:21,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121915994] [2024-11-24 00:43:21,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:21,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-24 00:43:21,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:21,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121915994] [2024-11-24 00:43:21,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121915994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:21,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:21,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-24 00:43:21,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398589183] [2024-11-24 00:43:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:21,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:43:21,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:21,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:43:21,372 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:43:21,456 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:43:21,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 452 flow. Second operand has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:21,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:21,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:43:21,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:21,923 INFO L124 PetriNetUnfolderBase]: 633/1439 cut-off events. [2024-11-24 00:43:21,923 INFO L125 PetriNetUnfolderBase]: For 607/715 co-relation queries the response was YES. [2024-11-24 00:43:21,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092 conditions, 1439 events. 633/1439 cut-off events. For 607/715 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7978 event pairs, 411 based on Foata normal form. 0/1072 useless extension candidates. Maximal degree in co-relation 1865. Up to 758 conditions per place. [2024-11-24 00:43:21,935 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 46 selfloop transitions, 14 changer transitions 30/122 dead transitions. [2024-11-24 00:43:21,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 122 transitions, 716 flow [2024-11-24 00:43:21,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:43:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:43:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 336 transitions. [2024-11-24 00:43:21,938 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-24 00:43:21,938 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 452 flow. Second operand 6 states and 336 transitions. [2024-11-24 00:43:21,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 122 transitions, 716 flow [2024-11-24 00:43:21,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 122 transitions, 679 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:43:21,945 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 368 flow [2024-11-24 00:43:21,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=368, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2024-11-24 00:43:21,947 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 20 predicate places. [2024-11-24 00:43:21,948 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 368 flow [2024-11-24 00:43:21,948 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:21,949 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:21,949 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:21,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-24 00:43:21,949 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:21,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:21,950 INFO L85 PathProgramCache]: Analyzing trace with hash -646164929, now seen corresponding path program 1 times [2024-11-24 00:43:21,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:21,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044084250] [2024-11-24 00:43:21,951 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:21,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:22,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:22,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044084250] [2024-11-24 00:43:22,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044084250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:22,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:22,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:43:22,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761843398] [2024-11-24 00:43:22,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:22,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:22,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:22,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:22,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:43:22,490 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-24 00:43:22,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 368 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:22,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:22,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-24 00:43:22,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:22,766 INFO L124 PetriNetUnfolderBase]: 862/1655 cut-off events. [2024-11-24 00:43:22,766 INFO L125 PetriNetUnfolderBase]: For 456/608 co-relation queries the response was YES. [2024-11-24 00:43:22,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3626 conditions, 1655 events. 862/1655 cut-off events. For 456/608 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 9135 event pairs, 612 based on Foata normal form. 0/1408 useless extension candidates. Maximal degree in co-relation 1966. Up to 1242 conditions per place. [2024-11-24 00:43:22,781 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 54 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-11-24 00:43:22,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 480 flow [2024-11-24 00:43:22,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:43:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:43:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-11-24 00:43:22,783 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-11-24 00:43:22,784 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 368 flow. Second operand 5 states and 214 transitions. [2024-11-24 00:43:22,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 480 flow [2024-11-24 00:43:22,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 86 transitions, 412 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-11-24 00:43:22,791 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 304 flow [2024-11-24 00:43:22,793 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-11-24 00:43:22,794 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2024-11-24 00:43:22,794 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 304 flow [2024-11-24 00:43:22,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:22,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:22,794 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:22,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-24 00:43:22,795 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:22,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:22,795 INFO L85 PathProgramCache]: Analyzing trace with hash -646164928, now seen corresponding path program 1 times [2024-11-24 00:43:22,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:22,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006404324] [2024-11-24 00:43:22,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:22,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:43:23,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006404324] [2024-11-24 00:43:23,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006404324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:23,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380795524] [2024-11-24 00:43:23,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:23,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:23,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:23,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:23,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-24 00:43:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:23,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-24 00:43:23,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:23,742 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 [2024-11-24 00:43:23,800 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:43:23,800 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 20 treesize of output 22 [2024-11-24 00:43:23,945 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-24 00:43:23,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-24 00:43:24,064 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:43:24,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-24 00:43:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:24,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:24,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380795524] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:24,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:43:24,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 16 [2024-11-24 00:43:24,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988885709] [2024-11-24 00:43:24,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:24,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:24,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:24,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:24,708 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:43:25,221 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:43:25,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 304 flow. Second operand has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:25,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:25,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:43:25,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:25,880 INFO L124 PetriNetUnfolderBase]: 808/1833 cut-off events. [2024-11-24 00:43:25,881 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-24 00:43:25,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3146 conditions, 1833 events. 808/1833 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 11679 event pairs, 338 based on Foata normal form. 0/1359 useless extension candidates. Maximal degree in co-relation 1545. Up to 756 conditions per place. [2024-11-24 00:43:25,896 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 61 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2024-11-24 00:43:25,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 100 transitions, 484 flow [2024-11-24 00:43:25,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:43:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:43:25,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2024-11-24 00:43:25,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-24 00:43:25,898 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 304 flow. Second operand 7 states and 352 transitions. [2024-11-24 00:43:25,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 100 transitions, 484 flow [2024-11-24 00:43:25,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 100 transitions, 476 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:43:25,901 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 338 flow [2024-11-24 00:43:25,901 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=338, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-11-24 00:43:25,902 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 7 predicate places. [2024-11-24 00:43:25,902 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 338 flow [2024-11-24 00:43:25,903 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:25,903 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:25,903 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:25,913 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:26,103 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-24 00:43:26,104 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:26,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1443724430, now seen corresponding path program 1 times [2024-11-24 00:43:26,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:26,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690591562] [2024-11-24 00:43:26,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:26,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:26,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:26,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690591562] [2024-11-24 00:43:26,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690591562] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:26,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470816640] [2024-11-24 00:43:26,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:26,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:26,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:26,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:26,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-24 00:43:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:26,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-24 00:43:26,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:26,736 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 [2024-11-24 00:43:26,855 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:43:26,855 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 25 treesize of output 25 [2024-11-24 00:43:26,999 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:43:26,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-24 00:43:27,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:27,306 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:27,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470816640] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:27,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:43:27,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2024-11-24 00:43:27,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808515036] [2024-11-24 00:43:27,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:27,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:27,614 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:27,614 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:43:28,279 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:43:28,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:28,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:28,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:43:28,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:29,088 INFO L124 PetriNetUnfolderBase]: 808/1793 cut-off events. [2024-11-24 00:43:29,088 INFO L125 PetriNetUnfolderBase]: For 283/367 co-relation queries the response was YES. [2024-11-24 00:43:29,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3540 conditions, 1793 events. 808/1793 cut-off events. For 283/367 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 11176 event pairs, 338 based on Foata normal form. 42/1471 useless extension candidates. Maximal degree in co-relation 1741. Up to 756 conditions per place. [2024-11-24 00:43:29,105 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 61 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-11-24 00:43:29,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 100 transitions, 506 flow [2024-11-24 00:43:29,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:43:29,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:43:29,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2024-11-24 00:43:29,108 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-11-24 00:43:29,108 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 338 flow. Second operand 7 states and 352 transitions. [2024-11-24 00:43:29,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 100 transitions, 506 flow [2024-11-24 00:43:29,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 100 transitions, 498 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:43:29,113 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 366 flow [2024-11-24 00:43:29,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2024-11-24 00:43:29,114 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2024-11-24 00:43:29,114 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 366 flow [2024-11-24 00:43:29,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.285714285714285) internal successors, (317), 7 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:29,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:29,115 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:29,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-24 00:43:29,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-24 00:43:29,319 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:29,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1443724429, now seen corresponding path program 1 times [2024-11-24 00:43:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:29,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124229867] [2024-11-24 00:43:29,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:29,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:29,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:29,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124229867] [2024-11-24 00:43:29,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124229867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:29,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:29,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:43:29,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294587492] [2024-11-24 00:43:29,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:29,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:29,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:29,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:29,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:43:29,645 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-24 00:43:29,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:29,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:29,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-24 00:43:29,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:30,071 INFO L124 PetriNetUnfolderBase]: 1142/2231 cut-off events. [2024-11-24 00:43:30,072 INFO L125 PetriNetUnfolderBase]: For 2897/2971 co-relation queries the response was YES. [2024-11-24 00:43:30,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5635 conditions, 2231 events. 1142/2231 cut-off events. For 2897/2971 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13426 event pairs, 772 based on Foata normal form. 146/2161 useless extension candidates. Maximal degree in co-relation 2788. Up to 1606 conditions per place. [2024-11-24 00:43:30,087 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 56 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-11-24 00:43:30,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 86 transitions, 482 flow [2024-11-24 00:43:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:43:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:43:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 214 transitions. [2024-11-24 00:43:30,089 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.535 [2024-11-24 00:43:30,089 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 366 flow. Second operand 5 states and 214 transitions. [2024-11-24 00:43:30,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 86 transitions, 482 flow [2024-11-24 00:43:30,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 468 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-24 00:43:30,093 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 356 flow [2024-11-24 00:43:30,093 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=356, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-11-24 00:43:30,095 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2024-11-24 00:43:30,095 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 356 flow [2024-11-24 00:43:30,095 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.2) internal successors, (191), 5 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:30,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:30,096 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:30,096 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-24 00:43:30,096 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:30,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:30,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1770968284, now seen corresponding path program 1 times [2024-11-24 00:43:30,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196657544] [2024-11-24 00:43:30,098 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:30,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:43:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:30,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196657544] [2024-11-24 00:43:30,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196657544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:30,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404132444] [2024-11-24 00:43:30,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:30,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:30,724 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:30,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-24 00:43:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:30,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-24 00:43:30,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:30,858 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 [2024-11-24 00:43:30,925 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:43:30,925 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 20 treesize of output 22 [2024-11-24 00:43:31,084 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-24 00:43:31,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-24 00:43:31,208 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:43:31,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-24 00:43:31,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:31,530 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:31,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404132444] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:31,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:43:31,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 16 [2024-11-24 00:43:31,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725377412] [2024-11-24 00:43:31,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:31,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:31,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:31,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-11-24 00:43:32,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:43:32,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 356 flow. Second operand has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:32,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:32,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:43:32,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:33,388 INFO L124 PetriNetUnfolderBase]: 1086/2207 cut-off events. [2024-11-24 00:43:33,388 INFO L125 PetriNetUnfolderBase]: For 2857/3373 co-relation queries the response was YES. [2024-11-24 00:43:33,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5148 conditions, 2207 events. 1086/2207 cut-off events. For 2857/3373 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 13870 event pairs, 468 based on Foata normal form. 0/1811 useless extension candidates. Maximal degree in co-relation 2544. Up to 990 conditions per place. [2024-11-24 00:43:33,410 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 62 selfloop transitions, 11 changer transitions 0/100 dead transitions. [2024-11-24 00:43:33,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 100 transitions, 561 flow [2024-11-24 00:43:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:43:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:43:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2024-11-24 00:43:33,413 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6267857142857143 [2024-11-24 00:43:33,413 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 356 flow. Second operand 7 states and 351 transitions. [2024-11-24 00:43:33,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 100 transitions, 561 flow [2024-11-24 00:43:33,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 100 transitions, 553 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:43:33,418 INFO L231 Difference]: Finished difference. Result has 92 places, 88 transitions, 390 flow [2024-11-24 00:43:33,419 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=92, PETRI_TRANSITIONS=88} [2024-11-24 00:43:33,420 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 13 predicate places. [2024-11-24 00:43:33,420 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 88 transitions, 390 flow [2024-11-24 00:43:33,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:33,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:33,421 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:33,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:33,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-24 00:43:33,626 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:33,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:33,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1805785090, now seen corresponding path program 1 times [2024-11-24 00:43:33,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:33,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018255071] [2024-11-24 00:43:33,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:33,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:33,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:33,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018255071] [2024-11-24 00:43:33,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018255071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:33,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954785306] [2024-11-24 00:43:33,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:33,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:33,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:33,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:33,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-24 00:43:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:34,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-24 00:43:34,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:34,064 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 [2024-11-24 00:43:34,148 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:43:34,148 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 25 treesize of output 25 [2024-11-24 00:43:34,314 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:43:34,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-24 00:43:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:34,608 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:43:34,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954785306] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:34,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:43:34,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 15 [2024-11-24 00:43:34,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517047050] [2024-11-24 00:43:34,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:34,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:34,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:34,862 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:34,862 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-11-24 00:43:35,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:43:35,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 88 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:35,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:35,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:43:35,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:36,052 INFO L124 PetriNetUnfolderBase]: 916/1923 cut-off events. [2024-11-24 00:43:36,052 INFO L125 PetriNetUnfolderBase]: For 2140/2406 co-relation queries the response was YES. [2024-11-24 00:43:36,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5268 conditions, 1923 events. 916/1923 cut-off events. For 2140/2406 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 12100 event pairs, 468 based on Foata normal form. 120/1813 useless extension candidates. Maximal degree in co-relation 2603. Up to 1058 conditions per place. [2024-11-24 00:43:36,074 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 61 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-11-24 00:43:36,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 101 transitions, 583 flow [2024-11-24 00:43:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:43:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:43:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 402 transitions. [2024-11-24 00:43:36,077 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-11-24 00:43:36,077 INFO L175 Difference]: Start difference. First operand has 92 places, 88 transitions, 390 flow. Second operand 8 states and 402 transitions. [2024-11-24 00:43:36,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 101 transitions, 583 flow [2024-11-24 00:43:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 101 transitions, 571 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 00:43:36,083 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 416 flow [2024-11-24 00:43:36,084 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=416, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2024-11-24 00:43:36,084 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 17 predicate places. [2024-11-24 00:43:36,085 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 416 flow [2024-11-24 00:43:36,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.285714285714285) internal successors, (324), 7 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:36,085 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:36,085 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:36,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-24 00:43:36,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-24 00:43:36,286 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:36,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:36,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1805785089, now seen corresponding path program 1 times [2024-11-24 00:43:36,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:36,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005914124] [2024-11-24 00:43:36,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:36,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:36,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:36,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005914124] [2024-11-24 00:43:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005914124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:36,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-24 00:43:36,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072061713] [2024-11-24 00:43:36,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:36,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:43:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:36,424 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:43:36,425 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-24 00:43:36,534 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2024-11-24 00:43:36,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 416 flow. Second operand has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:36,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:36,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2024-11-24 00:43:36,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:36,834 INFO L124 PetriNetUnfolderBase]: 760/1437 cut-off events. [2024-11-24 00:43:36,834 INFO L125 PetriNetUnfolderBase]: For 4687/5177 co-relation queries the response was YES. [2024-11-24 00:43:36,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4726 conditions, 1437 events. 760/1437 cut-off events. For 4687/5177 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 7592 event pairs, 468 based on Foata normal form. 112/1336 useless extension candidates. Maximal degree in co-relation 2332. Up to 1060 conditions per place. [2024-11-24 00:43:36,849 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 55 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-11-24 00:43:36,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 87 transitions, 532 flow [2024-11-24 00:43:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:43:36,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:43:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-24 00:43:36,852 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-11-24 00:43:36,853 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 416 flow. Second operand 5 states and 226 transitions. [2024-11-24 00:43:36,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 87 transitions, 532 flow [2024-11-24 00:43:36,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 87 transitions, 508 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-24 00:43:36,857 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 398 flow [2024-11-24 00:43:36,858 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2024-11-24 00:43:36,858 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2024-11-24 00:43:36,858 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 398 flow [2024-11-24 00:43:36,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.2) internal successors, (206), 5 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:36,859 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:36,859 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] [2024-11-24 00:43:36,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-24 00:43:36,859 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:36,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -934557314, now seen corresponding path program 1 times [2024-11-24 00:43:36,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:36,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711486283] [2024-11-24 00:43:36,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:36,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-24 00:43:37,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711486283] [2024-11-24 00:43:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711486283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:37,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437616024] [2024-11-24 00:43:37,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:37,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:37,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:37,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-24 00:43:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:37,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-24 00:43:37,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:37,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-24 00:43:37,607 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:43:37,607 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 25 treesize of output 25 [2024-11-24 00:43:37,737 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:43:37,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-24 00:43:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:43:38,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:43:38,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437616024] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:38,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:43:38,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 16 [2024-11-24 00:43:38,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562094600] [2024-11-24 00:43:38,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:38,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:38,445 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:38,445 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-24 00:43:39,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:43:39,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:39,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:39,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:43:39,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:39,845 INFO L124 PetriNetUnfolderBase]: 1182/2349 cut-off events. [2024-11-24 00:43:39,845 INFO L125 PetriNetUnfolderBase]: For 4157/4823 co-relation queries the response was YES. [2024-11-24 00:43:39,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6811 conditions, 2349 events. 1182/2349 cut-off events. For 4157/4823 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 14556 event pairs, 436 based on Foata normal form. 46/2087 useless extension candidates. Maximal degree in co-relation 3374. Up to 1058 conditions per place. [2024-11-24 00:43:39,870 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 64 selfloop transitions, 10 changer transitions 0/100 dead transitions. [2024-11-24 00:43:39,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 100 transitions, 608 flow [2024-11-24 00:43:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:43:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:43:39,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 351 transitions. [2024-11-24 00:43:39,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6267857142857143 [2024-11-24 00:43:39,874 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 398 flow. Second operand 7 states and 351 transitions. [2024-11-24 00:43:39,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 100 transitions, 608 flow [2024-11-24 00:43:39,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 100 transitions, 600 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-24 00:43:39,884 INFO L231 Difference]: Finished difference. Result has 96 places, 88 transitions, 426 flow [2024-11-24 00:43:39,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=426, PETRI_PLACES=96, PETRI_TRANSITIONS=88} [2024-11-24 00:43:39,885 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 17 predicate places. [2024-11-24 00:43:39,885 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 88 transitions, 426 flow [2024-11-24 00:43:39,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:39,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:39,885 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:43:39,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-24 00:43:40,086 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-24 00:43:40,086 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:40,087 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:40,087 INFO L85 PathProgramCache]: Analyzing trace with hash 192709607, now seen corresponding path program 1 times [2024-11-24 00:43:40,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:40,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054861439] [2024-11-24 00:43:40,087 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:40,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:40,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:40,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:40,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054861439] [2024-11-24 00:43:40,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054861439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:40,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959163313] [2024-11-24 00:43:40,240 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:40,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:40,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:40,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-24 00:43:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:40,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:43:40,389 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:40,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:40,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959163313] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:40,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:40,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-24 00:43:40,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771068268] [2024-11-24 00:43:40,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:40,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-24 00:43:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:40,591 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-24 00:43:40,592 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:43:40,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:43:40,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 88 transitions, 426 flow. Second operand has 14 states, 14 states have (on average 46.357142857142854) internal successors, (649), 14 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:40,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:40,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:43:40,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:41,403 INFO L124 PetriNetUnfolderBase]: 1001/1979 cut-off events. [2024-11-24 00:43:41,404 INFO L125 PetriNetUnfolderBase]: For 5003/5423 co-relation queries the response was YES. [2024-11-24 00:43:41,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6320 conditions, 1979 events. 1001/1979 cut-off events. For 5003/5423 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 11413 event pairs, 465 based on Foata normal form. 43/1796 useless extension candidates. Maximal degree in co-relation 3281. Up to 762 conditions per place. [2024-11-24 00:43:41,420 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 79 selfloop transitions, 31 changer transitions 0/138 dead transitions. [2024-11-24 00:43:41,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 138 transitions, 878 flow [2024-11-24 00:43:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:43:41,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 00:43:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 545 transitions. [2024-11-24 00:43:41,423 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-11-24 00:43:41,423 INFO L175 Difference]: Start difference. First operand has 96 places, 88 transitions, 426 flow. Second operand 10 states and 545 transitions. [2024-11-24 00:43:41,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 138 transitions, 878 flow [2024-11-24 00:43:41,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 855 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-24 00:43:41,431 INFO L231 Difference]: Finished difference. Result has 103 places, 92 transitions, 527 flow [2024-11-24 00:43:41,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=527, PETRI_PLACES=103, PETRI_TRANSITIONS=92} [2024-11-24 00:43:41,432 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 24 predicate places. [2024-11-24 00:43:41,432 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 92 transitions, 527 flow [2024-11-24 00:43:41,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.357142857142854) internal successors, (649), 14 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:41,433 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:41,433 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] [2024-11-24 00:43:41,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-24 00:43:41,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:41,634 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:41,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1082213154, now seen corresponding path program 1 times [2024-11-24 00:43:41,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:41,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263852707] [2024-11-24 00:43:41,635 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:41,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:42,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:43:42,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263852707] [2024-11-24 00:43:42,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263852707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:42,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703239378] [2024-11-24 00:43:42,217 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:42,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:42,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:42,220 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:42,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-24 00:43:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:42,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 00:43:42,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:42,378 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 [2024-11-24 00:43:42,501 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:43:42,502 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 20 treesize of output 22 [2024-11-24 00:43:42,682 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-24 00:43:42,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-24 00:43:42,861 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-24 00:43:42,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-24 00:43:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:43:43,343 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:43:44,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703239378] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:44,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:44,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 23 [2024-11-24 00:43:44,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321757572] [2024-11-24 00:43:44,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:44,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 00:43:44,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:44,163 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 00:43:44,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:43:47,952 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 80 [2024-11-24 00:43:47,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 92 transitions, 527 flow. Second operand has 25 states, 25 states have (on average 31.52) internal successors, (788), 25 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:47,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:47,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 80 [2024-11-24 00:43:47,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:49,896 INFO L124 PetriNetUnfolderBase]: 2168/3859 cut-off events. [2024-11-24 00:43:49,896 INFO L125 PetriNetUnfolderBase]: For 13350/14089 co-relation queries the response was YES. [2024-11-24 00:43:49,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12805 conditions, 3859 events. 2168/3859 cut-off events. For 13350/14089 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 23980 event pairs, 708 based on Foata normal form. 0/3374 useless extension candidates. Maximal degree in co-relation 6855. Up to 748 conditions per place. [2024-11-24 00:43:49,927 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 126 selfloop transitions, 29 changer transitions 0/177 dead transitions. [2024-11-24 00:43:49,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 177 transitions, 1363 flow [2024-11-24 00:43:49,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 00:43:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 00:43:49,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 626 transitions. [2024-11-24 00:43:49,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4602941176470588 [2024-11-24 00:43:49,930 INFO L175 Difference]: Start difference. First operand has 103 places, 92 transitions, 527 flow. Second operand 17 states and 626 transitions. [2024-11-24 00:43:49,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 177 transitions, 1363 flow [2024-11-24 00:43:49,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 177 transitions, 1304 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-24 00:43:49,941 INFO L231 Difference]: Finished difference. Result has 112 places, 95 transitions, 536 flow [2024-11-24 00:43:49,941 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=536, PETRI_PLACES=112, PETRI_TRANSITIONS=95} [2024-11-24 00:43:49,941 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 33 predicate places. [2024-11-24 00:43:49,941 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 95 transitions, 536 flow [2024-11-24 00:43:49,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 31.52) internal successors, (788), 25 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:49,942 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:49,942 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] [2024-11-24 00:43:49,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-24 00:43:50,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:50,147 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:50,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:50,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1093495070, now seen corresponding path program 1 times [2024-11-24 00:43:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938528591] [2024-11-24 00:43:50,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:50,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:50,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:43:50,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:50,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938528591] [2024-11-24 00:43:50,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938528591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:50,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254980935] [2024-11-24 00:43:50,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:50,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:50,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:50,401 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:50,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-24 00:43:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:50,526 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-24 00:43:50,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:50,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:43:50,574 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 15 treesize of output 11 [2024-11-24 00:43:50,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:43:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:43:50,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:43:50,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254980935] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:50,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:43:50,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-11-24 00:43:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667297732] [2024-11-24 00:43:50,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:50,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:43:50,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:50,843 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:43:50,843 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-24 00:43:51,228 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:43:51,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 95 transitions, 536 flow. Second operand has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:51,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:51,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:43:51,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:51,577 INFO L124 PetriNetUnfolderBase]: 960/2305 cut-off events. [2024-11-24 00:43:51,577 INFO L125 PetriNetUnfolderBase]: For 5658/5989 co-relation queries the response was YES. [2024-11-24 00:43:51,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7522 conditions, 2305 events. 960/2305 cut-off events. For 5658/5989 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 16267 event pairs, 468 based on Foata normal form. 96/2144 useless extension candidates. Maximal degree in co-relation 4847. Up to 1094 conditions per place. [2024-11-24 00:43:51,594 INFO L140 encePairwiseOnDemand]: 72/80 looper letters, 78 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-24 00:43:51,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 115 transitions, 853 flow [2024-11-24 00:43:51,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-24 00:43:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-24 00:43:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 357 transitions. [2024-11-24 00:43:51,596 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-11-24 00:43:51,596 INFO L175 Difference]: Start difference. First operand has 112 places, 95 transitions, 536 flow. Second operand 7 states and 357 transitions. [2024-11-24 00:43:51,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 115 transitions, 853 flow [2024-11-24 00:43:51,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 805 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-24 00:43:51,605 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 528 flow [2024-11-24 00:43:51,606 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=528, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2024-11-24 00:43:51,606 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 31 predicate places. [2024-11-24 00:43:51,606 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 528 flow [2024-11-24 00:43:51,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 46.57142857142857) internal successors, (326), 7 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:51,607 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:51,607 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] [2024-11-24 00:43:51,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:51,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:51,811 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:51,812 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:51,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1093495069, now seen corresponding path program 1 times [2024-11-24 00:43:51,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:51,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652668922] [2024-11-24 00:43:51,813 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:51,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-24 00:43:51,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:51,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652668922] [2024-11-24 00:43:51,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652668922] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:43:51,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:43:51,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-24 00:43:51,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068330110] [2024-11-24 00:43:51,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:43:51,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-24 00:43:51,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:51,883 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-24 00:43:51,883 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-24 00:43:51,999 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 80 [2024-11-24 00:43:52,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 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) [2024-11-24 00:43:52,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:52,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 80 [2024-11-24 00:43:52,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:52,292 INFO L124 PetriNetUnfolderBase]: 788/1742 cut-off events. [2024-11-24 00:43:52,292 INFO L125 PetriNetUnfolderBase]: For 6781/7176 co-relation queries the response was YES. [2024-11-24 00:43:52,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6456 conditions, 1742 events. 788/1742 cut-off events. For 6781/7176 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10940 event pairs, 468 based on Foata normal form. 141/1701 useless extension candidates. Maximal degree in co-relation 4162. Up to 1094 conditions per place. [2024-11-24 00:43:52,308 INFO L140 encePairwiseOnDemand]: 75/80 looper letters, 64 selfloop transitions, 3 changer transitions 0/93 dead transitions. [2024-11-24 00:43:52,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 656 flow [2024-11-24 00:43:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-24 00:43:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-24 00:43:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 188 transitions. [2024-11-24 00:43:52,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-24 00:43:52,310 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 528 flow. Second operand 4 states and 188 transitions. [2024-11-24 00:43:52,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 656 flow [2024-11-24 00:43:52,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 93 transitions, 636 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-24 00:43:52,319 INFO L231 Difference]: Finished difference. Result has 104 places, 93 transitions, 508 flow [2024-11-24 00:43:52,319 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=508, PETRI_PLACES=104, PETRI_TRANSITIONS=93} [2024-11-24 00:43:52,320 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 25 predicate places. [2024-11-24 00:43:52,320 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 93 transitions, 508 flow [2024-11-24 00:43:52,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.5) internal successors, (170), 4 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) [2024-11-24 00:43:52,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:52,320 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] [2024-11-24 00:43:52,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-24 00:43:52,320 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:52,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:52,321 INFO L85 PathProgramCache]: Analyzing trace with hash -811129852, now seen corresponding path program 1 times [2024-11-24 00:43:52,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:52,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691194342] [2024-11-24 00:43:52,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:52,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-24 00:43:52,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:43:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691194342] [2024-11-24 00:43:52,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691194342] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:43:52,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020052211] [2024-11-24 00:43:52,868 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:52,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:52,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:43:52,870 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:43:52,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-24 00:43:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:43:52,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-24 00:43:52,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:43:53,065 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 [2024-11-24 00:43:53,149 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:43:53,150 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 25 treesize of output 25 [2024-11-24 00:43:53,242 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-24 00:43:53,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 37 [2024-11-24 00:43:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:43:53,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:43:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:43:54,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020052211] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:43:54,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:43:54,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 27 [2024-11-24 00:43:54,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001121165] [2024-11-24 00:43:54,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:43:54,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-24 00:43:54,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:43:54,259 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-24 00:43:54,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2024-11-24 00:43:57,382 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 80 [2024-11-24 00:43:57,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 508 flow. Second operand has 29 states, 29 states have (on average 34.172413793103445) internal successors, (991), 29 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:57,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:43:57,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 80 [2024-11-24 00:43:57,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:43:59,493 INFO L124 PetriNetUnfolderBase]: 2288/3953 cut-off events. [2024-11-24 00:43:59,493 INFO L125 PetriNetUnfolderBase]: For 13861/14439 co-relation queries the response was YES. [2024-11-24 00:43:59,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14466 conditions, 3953 events. 2288/3953 cut-off events. For 13861/14439 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 23253 event pairs, 708 based on Foata normal form. 0/3772 useless extension candidates. Maximal degree in co-relation 7859. Up to 786 conditions per place. [2024-11-24 00:43:59,531 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 131 selfloop transitions, 30 changer transitions 0/179 dead transitions. [2024-11-24 00:43:59,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 179 transitions, 1409 flow [2024-11-24 00:43:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-24 00:43:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-24 00:43:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 773 transitions. [2024-11-24 00:43:59,534 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.483125 [2024-11-24 00:43:59,534 INFO L175 Difference]: Start difference. First operand has 104 places, 93 transitions, 508 flow. Second operand 20 states and 773 transitions. [2024-11-24 00:43:59,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 179 transitions, 1409 flow [2024-11-24 00:43:59,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 179 transitions, 1405 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:43:59,549 INFO L231 Difference]: Finished difference. Result has 121 places, 93 transitions, 574 flow [2024-11-24 00:43:59,549 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=574, PETRI_PLACES=121, PETRI_TRANSITIONS=93} [2024-11-24 00:43:59,549 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 42 predicate places. [2024-11-24 00:43:59,550 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 93 transitions, 574 flow [2024-11-24 00:43:59,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 34.172413793103445) internal successors, (991), 29 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:43:59,550 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:43:59,551 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] [2024-11-24 00:43:59,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-24 00:43:59,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:43:59,755 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:43:59,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:43:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash 624779108, now seen corresponding path program 1 times [2024-11-24 00:43:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:43:59,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791207769] [2024-11-24 00:43:59,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:43:59,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:43:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:00,118 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:44:00,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791207769] [2024-11-24 00:44:00,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791207769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219893433] [2024-11-24 00:44:00,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:00,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:00,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:00,126 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:00,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-24 00:44:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:00,274 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-24 00:44:00,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:00,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:44:00,380 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 15 treesize of output 11 [2024-11-24 00:44:00,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-24 00:44:00,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:44:00,645 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:44:01,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219893433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:01,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:01,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-24 00:44:01,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025434671] [2024-11-24 00:44:01,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:01,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-24 00:44:01,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:01,097 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-24 00:44:01,097 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2024-11-24 00:44:02,967 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:44:02,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 93 transitions, 574 flow. Second operand has 26 states, 26 states have (on average 45.42307692307692) internal successors, (1181), 26 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:02,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:02,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:44:02,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:03,805 INFO L124 PetriNetUnfolderBase]: 992/1733 cut-off events. [2024-11-24 00:44:03,805 INFO L125 PetriNetUnfolderBase]: For 8027/8799 co-relation queries the response was YES. [2024-11-24 00:44:03,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7419 conditions, 1733 events. 992/1733 cut-off events. For 8027/8799 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8943 event pairs, 324 based on Foata normal form. 74/1669 useless extension candidates. Maximal degree in co-relation 4994. Up to 384 conditions per place. [2024-11-24 00:44:03,816 INFO L140 encePairwiseOnDemand]: 65/80 looper letters, 109 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2024-11-24 00:44:03,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 160 transitions, 1344 flow [2024-11-24 00:44:03,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 00:44:03,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-24 00:44:03,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 721 transitions. [2024-11-24 00:44:03,819 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-11-24 00:44:03,819 INFO L175 Difference]: Start difference. First operand has 121 places, 93 transitions, 574 flow. Second operand 14 states and 721 transitions. [2024-11-24 00:44:03,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 160 transitions, 1344 flow [2024-11-24 00:44:03,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1305 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-24 00:44:03,830 INFO L231 Difference]: Finished difference. Result has 123 places, 92 transitions, 591 flow [2024-11-24 00:44:03,830 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=591, PETRI_PLACES=123, PETRI_TRANSITIONS=92} [2024-11-24 00:44:03,831 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 44 predicate places. [2024-11-24 00:44:03,831 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 92 transitions, 591 flow [2024-11-24 00:44:03,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 45.42307692307692) internal successors, (1181), 26 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:03,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:03,832 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:44:03,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-24 00:44:04,036 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:04,036 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:04,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1418199165, now seen corresponding path program 1 times [2024-11-24 00:44:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:04,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778834741] [2024-11-24 00:44:04,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:44:04,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778834741] [2024-11-24 00:44:04,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778834741] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:04,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537571442] [2024-11-24 00:44:04,192 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:04,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:04,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:04,195 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:04,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-24 00:44:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:04,350 INFO L256 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-24 00:44:04,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:04,505 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:44:04,508 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:04,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:44:04,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537571442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:04,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:04,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-24 00:44:04,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057365355] [2024-11-24 00:44:04,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:04,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-24 00:44:04,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:04,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-24 00:44:04,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2024-11-24 00:44:04,848 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:44:04,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 92 transitions, 591 flow. Second operand has 16 states, 16 states have (on average 46.4375) internal successors, (743), 16 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:04,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:04,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:44:04,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:05,445 INFO L124 PetriNetUnfolderBase]: 1015/1745 cut-off events. [2024-11-24 00:44:05,445 INFO L125 PetriNetUnfolderBase]: For 7716/8327 co-relation queries the response was YES. [2024-11-24 00:44:05,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7239 conditions, 1745 events. 1015/1745 cut-off events. For 7716/8327 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 8465 event pairs, 468 based on Foata normal form. 35/1687 useless extension candidates. Maximal degree in co-relation 4755. Up to 823 conditions per place. [2024-11-24 00:44:05,455 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 78 selfloop transitions, 31 changer transitions 0/132 dead transitions. [2024-11-24 00:44:05,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 132 transitions, 1035 flow [2024-11-24 00:44:05,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-24 00:44:05,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-24 00:44:05,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 543 transitions. [2024-11-24 00:44:05,457 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.67875 [2024-11-24 00:44:05,457 INFO L175 Difference]: Start difference. First operand has 123 places, 92 transitions, 591 flow. Second operand 10 states and 543 transitions. [2024-11-24 00:44:05,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 132 transitions, 1035 flow [2024-11-24 00:44:05,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 132 transitions, 965 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-11-24 00:44:05,466 INFO L231 Difference]: Finished difference. Result has 122 places, 96 transitions, 648 flow [2024-11-24 00:44:05,467 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=648, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2024-11-24 00:44:05,467 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 43 predicate places. [2024-11-24 00:44:05,468 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 648 flow [2024-11-24 00:44:05,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 46.4375) internal successors, (743), 16 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:05,468 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:05,468 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:44:05,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-24 00:44:05,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:05,669 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:05,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:05,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1797579607, now seen corresponding path program 2 times [2024-11-24 00:44:05,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318217989] [2024-11-24 00:44:05,670 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:05,722 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:44:05,723 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:06,316 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:44:06,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:06,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318217989] [2024-11-24 00:44:06,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318217989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:06,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872101617] [2024-11-24 00:44:06,317 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:06,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:06,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:06,319 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:06,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-24 00:44:06,482 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:44:06,482 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:06,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-24 00:44:06,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:06,492 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 [2024-11-24 00:44:06,650 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:44:06,650 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 25 treesize of output 25 [2024-11-24 00:44:06,816 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-24 00:44:06,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2024-11-24 00:44:06,969 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:44:06,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-24 00:44:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:44:07,461 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:44:08,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872101617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:08,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:08,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2024-11-24 00:44:08,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401548300] [2024-11-24 00:44:08,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:08,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 00:44:08,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:08,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 00:44:08,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:44:12,701 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 80 [2024-11-24 00:44:12,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 648 flow. Second operand has 25 states, 25 states have (on average 31.64) internal successors, (791), 25 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:12,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:12,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 80 [2024-11-24 00:44:12,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:15,957 INFO L124 PetriNetUnfolderBase]: 2678/4377 cut-off events. [2024-11-24 00:44:15,958 INFO L125 PetriNetUnfolderBase]: For 15783/16382 co-relation queries the response was YES. [2024-11-24 00:44:15,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16907 conditions, 4377 events. 2678/4377 cut-off events. For 15783/16382 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 23902 event pairs, 420 based on Foata normal form. 124/4476 useless extension candidates. Maximal degree in co-relation 11552. Up to 654 conditions per place. [2024-11-24 00:44:15,984 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 173 selfloop transitions, 33 changer transitions 0/223 dead transitions. [2024-11-24 00:44:15,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 223 transitions, 1710 flow [2024-11-24 00:44:15,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-24 00:44:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-24 00:44:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 740 transitions. [2024-11-24 00:44:15,987 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4868421052631579 [2024-11-24 00:44:15,987 INFO L175 Difference]: Start difference. First operand has 122 places, 96 transitions, 648 flow. Second operand 19 states and 740 transitions. [2024-11-24 00:44:15,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 223 transitions, 1710 flow [2024-11-24 00:44:16,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 223 transitions, 1649 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-24 00:44:16,004 INFO L231 Difference]: Finished difference. Result has 135 places, 99 transitions, 690 flow [2024-11-24 00:44:16,005 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=589, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=690, PETRI_PLACES=135, PETRI_TRANSITIONS=99} [2024-11-24 00:44:16,005 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 56 predicate places. [2024-11-24 00:44:16,005 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 99 transitions, 690 flow [2024-11-24 00:44:16,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 31.64) internal successors, (791), 25 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:16,006 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:16,006 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] [2024-11-24 00:44:16,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-24 00:44:16,210 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:16,210 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:16,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash 109607749, now seen corresponding path program 1 times [2024-11-24 00:44:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:16,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29845267] [2024-11-24 00:44:16,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:16,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:44:16,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:16,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29845267] [2024-11-24 00:44:16,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29845267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:16,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018840096] [2024-11-24 00:44:16,757 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:16,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:16,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:16,759 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:16,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-24 00:44:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:16,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 00:44:16,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:16,942 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 [2024-11-24 00:44:17,021 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:44:17,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-24 00:44:17,148 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:44:17,149 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-24 00:44:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:44:17,812 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:44:18,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018840096] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:18,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:18,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 24 [2024-11-24 00:44:18,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723727386] [2024-11-24 00:44:18,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:18,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-24 00:44:18,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:18,250 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-24 00:44:18,251 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2024-11-24 00:44:21,104 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-24 00:44:21,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 99 transitions, 690 flow. Second operand has 25 states, 25 states have (on average 37.36) internal successors, (934), 25 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:21,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:21,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-24 00:44:21,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:22,798 INFO L124 PetriNetUnfolderBase]: 1295/2330 cut-off events. [2024-11-24 00:44:22,799 INFO L125 PetriNetUnfolderBase]: For 11869/12477 co-relation queries the response was YES. [2024-11-24 00:44:22,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10003 conditions, 2330 events. 1295/2330 cut-off events. For 11869/12477 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12571 event pairs, 449 based on Foata normal form. 34/2288 useless extension candidates. Maximal degree in co-relation 6540. Up to 598 conditions per place. [2024-11-24 00:44:22,813 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 115 selfloop transitions, 28 changer transitions 0/165 dead transitions. [2024-11-24 00:44:22,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 165 transitions, 1317 flow [2024-11-24 00:44:22,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 00:44:22,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 00:44:22,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 726 transitions. [2024-11-24 00:44:22,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5338235294117647 [2024-11-24 00:44:22,816 INFO L175 Difference]: Start difference. First operand has 135 places, 99 transitions, 690 flow. Second operand 17 states and 726 transitions. [2024-11-24 00:44:22,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 165 transitions, 1317 flow [2024-11-24 00:44:22,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 165 transitions, 1243 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-11-24 00:44:22,831 INFO L231 Difference]: Finished difference. Result has 139 places, 101 transitions, 700 flow [2024-11-24 00:44:22,832 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=700, PETRI_PLACES=139, PETRI_TRANSITIONS=101} [2024-11-24 00:44:22,832 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 60 predicate places. [2024-11-24 00:44:22,832 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 101 transitions, 700 flow [2024-11-24 00:44:22,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 37.36) internal successors, (934), 25 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:22,833 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:22,833 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] [2024-11-24 00:44:22,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-24 00:44:23,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:23,034 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:23,034 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:23,034 INFO L85 PathProgramCache]: Analyzing trace with hash 532244035, now seen corresponding path program 1 times [2024-11-24 00:44:23,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:23,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759064224] [2024-11-24 00:44:23,035 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:23,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-24 00:44:23,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759064224] [2024-11-24 00:44:23,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759064224] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826178382] [2024-11-24 00:44:23,159 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:23,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:23,162 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:23,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-24 00:44:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:23,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 00:44:23,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:44:23,351 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:44:23,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826178382] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:23,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:44:23,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-24 00:44:23,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827142779] [2024-11-24 00:44:23,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:44:23,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-24 00:44:23,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:23,395 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-24 00:44:23,395 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-24 00:44:23,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:44:23,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 101 transitions, 700 flow. Second operand has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:23,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:23,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:44:23,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:23,715 INFO L124 PetriNetUnfolderBase]: 1141/2216 cut-off events. [2024-11-24 00:44:23,715 INFO L125 PetriNetUnfolderBase]: For 10402/10783 co-relation queries the response was YES. [2024-11-24 00:44:23,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9277 conditions, 2216 events. 1141/2216 cut-off events. For 10402/10783 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12442 event pairs, 406 based on Foata normal form. 68/2141 useless extension candidates. Maximal degree in co-relation 6220. Up to 949 conditions per place. [2024-11-24 00:44:23,726 INFO L140 encePairwiseOnDemand]: 74/80 looper letters, 86 selfloop transitions, 10 changer transitions 0/120 dead transitions. [2024-11-24 00:44:23,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 120 transitions, 1004 flow [2024-11-24 00:44:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-24 00:44:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-24 00:44:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 268 transitions. [2024-11-24 00:44:23,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.67 [2024-11-24 00:44:23,727 INFO L175 Difference]: Start difference. First operand has 139 places, 101 transitions, 700 flow. Second operand 5 states and 268 transitions. [2024-11-24 00:44:23,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 120 transitions, 1004 flow [2024-11-24 00:44:23,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 120 transitions, 947 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-11-24 00:44:23,736 INFO L231 Difference]: Finished difference. Result has 128 places, 100 transitions, 656 flow [2024-11-24 00:44:23,736 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=656, PETRI_PLACES=128, PETRI_TRANSITIONS=100} [2024-11-24 00:44:23,736 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 49 predicate places. [2024-11-24 00:44:23,736 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 100 transitions, 656 flow [2024-11-24 00:44:23,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.8) internal successors, (249), 5 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:23,736 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:23,737 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:44:23,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-24 00:44:23,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-24 00:44:23,938 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:23,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1469280197, now seen corresponding path program 2 times [2024-11-24 00:44:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:23,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965071041] [2024-11-24 00:44:23,939 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:23,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:23,972 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:44:23,972 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-24 00:44:24,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:24,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965071041] [2024-11-24 00:44:24,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965071041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:24,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494903735] [2024-11-24 00:44:24,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:24,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:24,461 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:24,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-24 00:44:24,618 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:44:24,618 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:24,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-24 00:44:24,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:24,629 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 [2024-11-24 00:44:24,732 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:44:24,732 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 20 treesize of output 22 [2024-11-24 00:44:24,840 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2024-11-24 00:44:24,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2024-11-24 00:44:24,991 INFO L349 Elim1Store]: treesize reduction 72, result has 18.2 percent of original size [2024-11-24 00:44:24,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 38 [2024-11-24 00:44:25,822 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-24 00:44:25,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-24 00:44:26,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494903735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:26,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:26,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 26 [2024-11-24 00:44:26,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084747005] [2024-11-24 00:44:26,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:26,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-24 00:44:26,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:26,378 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-24 00:44:26,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2024-11-24 00:44:31,688 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 80 [2024-11-24 00:44:31,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 100 transitions, 656 flow. Second operand has 28 states, 28 states have (on average 31.607142857142858) internal successors, (885), 28 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:31,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:31,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 80 [2024-11-24 00:44:31,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:35,715 INFO L124 PetriNetUnfolderBase]: 3372/5523 cut-off events. [2024-11-24 00:44:35,715 INFO L125 PetriNetUnfolderBase]: For 33552/34171 co-relation queries the response was YES. [2024-11-24 00:44:35,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21775 conditions, 5523 events. 3372/5523 cut-off events. For 33552/34171 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 31358 event pairs, 468 based on Foata normal form. 168/5663 useless extension candidates. Maximal degree in co-relation 16037. Up to 882 conditions per place. [2024-11-24 00:44:35,752 INFO L140 encePairwiseOnDemand]: 64/80 looper letters, 167 selfloop transitions, 35 changer transitions 0/223 dead transitions. [2024-11-24 00:44:35,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 223 transitions, 1803 flow [2024-11-24 00:44:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-24 00:44:35,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-24 00:44:35,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 701 transitions. [2024-11-24 00:44:35,754 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48680555555555555 [2024-11-24 00:44:35,754 INFO L175 Difference]: Start difference. First operand has 128 places, 100 transitions, 656 flow. Second operand 18 states and 701 transitions. [2024-11-24 00:44:35,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 223 transitions, 1803 flow [2024-11-24 00:44:35,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 223 transitions, 1764 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-24 00:44:35,778 INFO L231 Difference]: Finished difference. Result has 143 places, 106 transitions, 766 flow [2024-11-24 00:44:35,778 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=766, PETRI_PLACES=143, PETRI_TRANSITIONS=106} [2024-11-24 00:44:35,781 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 64 predicate places. [2024-11-24 00:44:35,781 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 106 transitions, 766 flow [2024-11-24 00:44:35,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 31.607142857142858) internal successors, (885), 28 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:35,782 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:35,782 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:44:35,795 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-24 00:44:35,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-24 00:44:35,986 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:35,986 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:35,987 INFO L85 PathProgramCache]: Analyzing trace with hash -897126357, now seen corresponding path program 1 times [2024-11-24 00:44:35,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:35,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604859936] [2024-11-24 00:44:35,987 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:35,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:44:36,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:36,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604859936] [2024-11-24 00:44:36,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604859936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:36,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724612725] [2024-11-24 00:44:36,322 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:36,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:36,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:36,326 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:36,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-24 00:44:36,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:36,515 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-24 00:44:36,518 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:36,537 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 [2024-11-24 00:44:36,608 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-24 00:44:36,608 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 16 treesize of output 18 [2024-11-24 00:44:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:44:37,162 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:44:37,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724612725] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:37,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:37,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2024-11-24 00:44:37,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3345345] [2024-11-24 00:44:37,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:37,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 00:44:37,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:37,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 00:44:37,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:44:39,340 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 80 [2024-11-24 00:44:39,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 106 transitions, 766 flow. Second operand has 21 states, 21 states have (on average 38.285714285714285) internal successors, (804), 21 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:39,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:39,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 80 [2024-11-24 00:44:39,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:40,692 INFO L124 PetriNetUnfolderBase]: 1589/3082 cut-off events. [2024-11-24 00:44:40,692 INFO L125 PetriNetUnfolderBase]: For 20851/21623 co-relation queries the response was YES. [2024-11-24 00:44:40,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14122 conditions, 3082 events. 1589/3082 cut-off events. For 20851/21623 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 18664 event pairs, 715 based on Foata normal form. 86/2952 useless extension candidates. Maximal degree in co-relation 10370. Up to 911 conditions per place. [2024-11-24 00:44:40,713 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 97 selfloop transitions, 22 changer transitions 0/149 dead transitions. [2024-11-24 00:44:40,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 149 transitions, 1260 flow [2024-11-24 00:44:40,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-24 00:44:40,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-24 00:44:40,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 606 transitions. [2024-11-24 00:44:40,715 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5410714285714285 [2024-11-24 00:44:40,715 INFO L175 Difference]: Start difference. First operand has 143 places, 106 transitions, 766 flow. Second operand 14 states and 606 transitions. [2024-11-24 00:44:40,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 149 transitions, 1260 flow [2024-11-24 00:44:40,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 149 transitions, 1163 flow, removed 18 selfloop flow, removed 13 redundant places. [2024-11-24 00:44:40,730 INFO L231 Difference]: Finished difference. Result has 144 places, 106 transitions, 744 flow [2024-11-24 00:44:40,730 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=744, PETRI_PLACES=144, PETRI_TRANSITIONS=106} [2024-11-24 00:44:40,731 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 65 predicate places. [2024-11-24 00:44:40,731 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 106 transitions, 744 flow [2024-11-24 00:44:40,731 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 38.285714285714285) internal successors, (804), 21 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:40,731 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:40,731 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] [2024-11-24 00:44:40,746 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-24 00:44:40,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:40,932 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:40,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:40,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1696953419, now seen corresponding path program 1 times [2024-11-24 00:44:40,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:40,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192503642] [2024-11-24 00:44:40,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:40,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-24 00:44:41,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192503642] [2024-11-24 00:44:41,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192503642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:41,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452217783] [2024-11-24 00:44:41,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:41,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:41,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:41,543 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:41,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-24 00:44:41,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:41,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-11-24 00:44:41,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:41,728 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 [2024-11-24 00:44:41,782 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-24 00:44:41,782 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 20 treesize of output 22 [2024-11-24 00:44:41,892 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-24 00:44:41,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2024-11-24 00:44:42,518 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-24 00:44:42,518 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:42,992 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:44:42,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452217783] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:42,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:42,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2024-11-24 00:44:42,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293551163] [2024-11-24 00:44:42,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:42,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-24 00:44:42,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:42,994 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-24 00:44:42,994 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2024-11-24 00:44:46,920 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 80 [2024-11-24 00:44:46,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 106 transitions, 744 flow. Second operand has 26 states, 26 states have (on average 37.5) internal successors, (975), 26 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:46,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:46,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 80 [2024-11-24 00:44:46,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:48,879 INFO L124 PetriNetUnfolderBase]: 2009/3443 cut-off events. [2024-11-24 00:44:48,879 INFO L125 PetriNetUnfolderBase]: For 24233/25209 co-relation queries the response was YES. [2024-11-24 00:44:48,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15369 conditions, 3443 events. 2009/3443 cut-off events. For 24233/25209 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 19335 event pairs, 758 based on Foata normal form. 119/3316 useless extension candidates. Maximal degree in co-relation 12057. Up to 853 conditions per place. [2024-11-24 00:44:48,906 INFO L140 encePairwiseOnDemand]: 66/80 looper letters, 114 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2024-11-24 00:44:48,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 170 transitions, 1459 flow [2024-11-24 00:44:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-24 00:44:48,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-24 00:44:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 722 transitions. [2024-11-24 00:44:48,908 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5308823529411765 [2024-11-24 00:44:48,908 INFO L175 Difference]: Start difference. First operand has 144 places, 106 transitions, 744 flow. Second operand 17 states and 722 transitions. [2024-11-24 00:44:48,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 170 transitions, 1459 flow [2024-11-24 00:44:48,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 170 transitions, 1424 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-24 00:44:48,926 INFO L231 Difference]: Finished difference. Result has 159 places, 108 transitions, 817 flow [2024-11-24 00:44:48,926 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=733, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=817, PETRI_PLACES=159, PETRI_TRANSITIONS=108} [2024-11-24 00:44:48,927 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 80 predicate places. [2024-11-24 00:44:48,927 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 108 transitions, 817 flow [2024-11-24 00:44:48,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 37.5) internal successors, (975), 26 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:48,927 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:48,927 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:44:48,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-24 00:44:49,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-11-24 00:44:49,128 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:49,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:49,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1065947705, now seen corresponding path program 1 times [2024-11-24 00:44:49,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:49,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297925666] [2024-11-24 00:44:49,129 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:49,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:44:49,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:49,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297925666] [2024-11-24 00:44:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297925666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:49,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708893080] [2024-11-24 00:44:49,360 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:49,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:49,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:49,364 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:49,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-24 00:44:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:49,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-24 00:44:49,534 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:44:49,698 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:49,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-24 00:44:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-11-24 00:44:49,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708893080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:49,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:49,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-24 00:44:49,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21566651] [2024-11-24 00:44:49,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:49,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-24 00:44:49,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:49,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-24 00:44:49,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-24 00:44:51,049 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:44:51,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 108 transitions, 817 flow. Second operand has 20 states, 20 states have (on average 46.25) internal successors, (925), 20 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:51,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:51,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:44:51,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:51,920 INFO L124 PetriNetUnfolderBase]: 1503/2729 cut-off events. [2024-11-24 00:44:51,920 INFO L125 PetriNetUnfolderBase]: For 19023/19898 co-relation queries the response was YES. [2024-11-24 00:44:51,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12683 conditions, 2729 events. 1503/2729 cut-off events. For 19023/19898 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 15706 event pairs, 751 based on Foata normal form. 118/2625 useless extension candidates. Maximal degree in co-relation 10183. Up to 808 conditions per place. [2024-11-24 00:44:51,942 INFO L140 encePairwiseOnDemand]: 67/80 looper letters, 90 selfloop transitions, 25 changer transitions 0/147 dead transitions. [2024-11-24 00:44:51,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 147 transitions, 1291 flow [2024-11-24 00:44:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:44:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:44:51,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 451 transitions. [2024-11-24 00:44:51,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7046875 [2024-11-24 00:44:51,944 INFO L175 Difference]: Start difference. First operand has 159 places, 108 transitions, 817 flow. Second operand 8 states and 451 transitions. [2024-11-24 00:44:51,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 147 transitions, 1291 flow [2024-11-24 00:44:51,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 147 transitions, 1245 flow, removed 1 selfloop flow, removed 13 redundant places. [2024-11-24 00:44:51,959 INFO L231 Difference]: Finished difference. Result has 154 places, 108 transitions, 826 flow [2024-11-24 00:44:51,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=771, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=826, PETRI_PLACES=154, PETRI_TRANSITIONS=108} [2024-11-24 00:44:51,960 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 75 predicate places. [2024-11-24 00:44:51,960 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 108 transitions, 826 flow [2024-11-24 00:44:51,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 46.25) internal successors, (925), 20 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:51,960 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:51,960 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:44:51,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-24 00:44:52,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-24 00:44:52,161 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:52,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:52,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1290979070, now seen corresponding path program 2 times [2024-11-24 00:44:52,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:52,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025078630] [2024-11-24 00:44:52,162 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:52,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:52,207 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:44:52,207 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:52,370 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:44:52,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:52,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025078630] [2024-11-24 00:44:52,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025078630] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:52,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78178373] [2024-11-24 00:44:52,370 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:52,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:52,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:52,373 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:52,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-24 00:44:52,581 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:44:52,581 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:52,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-24 00:44:52,587 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:44:52,757 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:44:52,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78178373] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:44:52,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:44:52,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-24 00:44:52,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434795167] [2024-11-24 00:44:52,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:44:52,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-24 00:44:52,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:52,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-24 00:44:52,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-11-24 00:44:53,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:44:53,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 108 transitions, 826 flow. Second operand has 19 states, 19 states have (on average 46.26315789473684) internal successors, (879), 19 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:53,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:53,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:44:53,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:54,108 INFO L124 PetriNetUnfolderBase]: 3134/5563 cut-off events. [2024-11-24 00:44:54,109 INFO L125 PetriNetUnfolderBase]: For 39360/40979 co-relation queries the response was YES. [2024-11-24 00:44:54,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27121 conditions, 5563 events. 3134/5563 cut-off events. For 39360/40979 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 34193 event pairs, 1262 based on Foata normal form. 103/5320 useless extension candidates. Maximal degree in co-relation 18435. Up to 1882 conditions per place. [2024-11-24 00:44:54,153 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 145 selfloop transitions, 67 changer transitions 0/241 dead transitions. [2024-11-24 00:44:54,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 241 transitions, 2327 flow [2024-11-24 00:44:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 00:44:54,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 00:44:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 858 transitions. [2024-11-24 00:44:54,155 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6703125 [2024-11-24 00:44:54,155 INFO L175 Difference]: Start difference. First operand has 154 places, 108 transitions, 826 flow. Second operand 16 states and 858 transitions. [2024-11-24 00:44:54,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 241 transitions, 2327 flow [2024-11-24 00:44:54,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 241 transitions, 2205 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-24 00:44:54,184 INFO L231 Difference]: Finished difference. Result has 167 places, 149 transitions, 1324 flow [2024-11-24 00:44:54,184 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1324, PETRI_PLACES=167, PETRI_TRANSITIONS=149} [2024-11-24 00:44:54,185 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 88 predicate places. [2024-11-24 00:44:54,185 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 149 transitions, 1324 flow [2024-11-24 00:44:54,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.26315789473684) internal successors, (879), 19 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:54,186 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:54,186 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] [2024-11-24 00:44:54,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-24 00:44:54,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-24 00:44:54,391 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:54,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -794763348, now seen corresponding path program 1 times [2024-11-24 00:44:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:54,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14791404] [2024-11-24 00:44:54,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:54,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:54,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:44:54,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:54,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14791404] [2024-11-24 00:44:54,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14791404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:54,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027663281] [2024-11-24 00:44:54,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:44:54,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:44:54,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:44:54,568 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:44:54,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-24 00:44:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:44:54,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:44:54,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:44:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:44:54,861 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:44:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:44:54,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027663281] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:44:54,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:44:54,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-24 00:44:54,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831444999] [2024-11-24 00:44:54,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:44:54,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:44:54,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:54,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:44:54,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:44:55,035 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:44:55,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 149 transitions, 1324 flow. Second operand has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:55,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:55,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:44:55,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:56,292 INFO L124 PetriNetUnfolderBase]: 3716/7197 cut-off events. [2024-11-24 00:44:56,292 INFO L125 PetriNetUnfolderBase]: For 47070/47786 co-relation queries the response was YES. [2024-11-24 00:44:56,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33570 conditions, 7197 events. 3716/7197 cut-off events. For 47070/47786 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 50518 event pairs, 1234 based on Foata normal form. 70/6717 useless extension candidates. Maximal degree in co-relation 28437. Up to 2457 conditions per place. [2024-11-24 00:44:56,348 INFO L140 encePairwiseOnDemand]: 71/80 looper letters, 216 selfloop transitions, 30 changer transitions 0/274 dead transitions. [2024-11-24 00:44:56,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 274 transitions, 3205 flow [2024-11-24 00:44:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-24 00:44:56,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-24 00:44:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 478 transitions. [2024-11-24 00:44:56,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6638888888888889 [2024-11-24 00:44:56,349 INFO L175 Difference]: Start difference. First operand has 167 places, 149 transitions, 1324 flow. Second operand 9 states and 478 transitions. [2024-11-24 00:44:56,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 274 transitions, 3205 flow [2024-11-24 00:44:56,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 274 transitions, 3205 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-24 00:44:56,416 INFO L231 Difference]: Finished difference. Result has 177 places, 168 transitions, 1539 flow [2024-11-24 00:44:56,416 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1539, PETRI_PLACES=177, PETRI_TRANSITIONS=168} [2024-11-24 00:44:56,416 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 98 predicate places. [2024-11-24 00:44:56,416 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 168 transitions, 1539 flow [2024-11-24 00:44:56,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:56,417 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:56,417 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] [2024-11-24 00:44:56,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-24 00:44:56,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-24 00:44:56,618 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:56,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:56,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1572664482, now seen corresponding path program 2 times [2024-11-24 00:44:56,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:56,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505160187] [2024-11-24 00:44:56,618 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:44:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:56,629 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-24 00:44:56,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:44:56,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:56,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505160187] [2024-11-24 00:44:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505160187] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:44:56,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:44:56,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:44:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204469957] [2024-11-24 00:44:56,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:44:56,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:44:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:56,690 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:44:56,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:44:56,751 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:44:56,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 168 transitions, 1539 flow. Second operand has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:56,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:56,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:44:56,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:44:58,439 INFO L124 PetriNetUnfolderBase]: 4791/8961 cut-off events. [2024-11-24 00:44:58,439 INFO L125 PetriNetUnfolderBase]: For 78009/80604 co-relation queries the response was YES. [2024-11-24 00:44:58,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46817 conditions, 8961 events. 4791/8961 cut-off events. For 78009/80604 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 65760 event pairs, 1918 based on Foata normal form. 225/8640 useless extension candidates. Maximal degree in co-relation 40726. Up to 3816 conditions per place. [2024-11-24 00:44:58,629 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 226 selfloop transitions, 17 changer transitions 15/289 dead transitions. [2024-11-24 00:44:58,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 289 transitions, 3559 flow [2024-11-24 00:44:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:44:58,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:44:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 337 transitions. [2024-11-24 00:44:58,630 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7020833333333333 [2024-11-24 00:44:58,631 INFO L175 Difference]: Start difference. First operand has 177 places, 168 transitions, 1539 flow. Second operand 6 states and 337 transitions. [2024-11-24 00:44:58,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 289 transitions, 3559 flow [2024-11-24 00:44:58,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 289 transitions, 3556 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-24 00:44:58,720 INFO L231 Difference]: Finished difference. Result has 184 places, 181 transitions, 1747 flow [2024-11-24 00:44:58,721 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1747, PETRI_PLACES=184, PETRI_TRANSITIONS=181} [2024-11-24 00:44:58,721 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 105 predicate places. [2024-11-24 00:44:58,721 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 181 transitions, 1747 flow [2024-11-24 00:44:58,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:58,721 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:44:58,722 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] [2024-11-24 00:44:58,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-24 00:44:58,722 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:44:58,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:44:58,722 INFO L85 PathProgramCache]: Analyzing trace with hash -791832160, now seen corresponding path program 3 times [2024-11-24 00:44:58,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:44:58,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869422657] [2024-11-24 00:44:58,722 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-24 00:44:58,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:44:58,734 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-24 00:44:58,734 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:44:58,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:44:58,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:44:58,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869422657] [2024-11-24 00:44:58,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869422657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:44:58,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:44:58,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:44:58,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267100263] [2024-11-24 00:44:58,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:44:58,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:44:58,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:44:58,791 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:44:58,791 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:44:58,858 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:44:58,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 181 transitions, 1747 flow. Second operand has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:44:58,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:44:58,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:44:58,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:45:00,989 INFO L124 PetriNetUnfolderBase]: 5474/10615 cut-off events. [2024-11-24 00:45:00,990 INFO L125 PetriNetUnfolderBase]: For 92282/94547 co-relation queries the response was YES. [2024-11-24 00:45:01,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57521 conditions, 10615 events. 5474/10615 cut-off events. For 92282/94547 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 81898 event pairs, 2573 based on Foata normal form. 275/10250 useless extension candidates. Maximal degree in co-relation 56801. Up to 5480 conditions per place. [2024-11-24 00:45:01,110 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 195 selfloop transitions, 38 changer transitions 14/278 dead transitions. [2024-11-24 00:45:01,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 278 transitions, 3471 flow [2024-11-24 00:45:01,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:45:01,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:45:01,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 338 transitions. [2024-11-24 00:45:01,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-11-24 00:45:01,112 INFO L175 Difference]: Start difference. First operand has 184 places, 181 transitions, 1747 flow. Second operand 6 states and 338 transitions. [2024-11-24 00:45:01,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 278 transitions, 3471 flow [2024-11-24 00:45:01,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 278 transitions, 3455 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-24 00:45:01,555 INFO L231 Difference]: Finished difference. Result has 192 places, 200 transitions, 2123 flow [2024-11-24 00:45:01,556 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2123, PETRI_PLACES=192, PETRI_TRANSITIONS=200} [2024-11-24 00:45:01,556 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 113 predicate places. [2024-11-24 00:45:01,556 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 200 transitions, 2123 flow [2024-11-24 00:45:01,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:01,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:45:01,557 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] [2024-11-24 00:45:01,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-24 00:45:01,557 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:45:01,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:45:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1756982560, now seen corresponding path program 4 times [2024-11-24 00:45:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:45:01,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812706324] [2024-11-24 00:45:01,558 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:45:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:45:01,573 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:45:01,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:45:01,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:45:01,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:45:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812706324] [2024-11-24 00:45:01,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812706324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:45:01,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010844975] [2024-11-24 00:45:01,651 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-24 00:45:01,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:45:01,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:45:01,656 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:45:01,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-24 00:45:01,822 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-24 00:45:01,822 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:45:01,824 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-24 00:45:01,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:45:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:45:01,902 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:45:01,955 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-24 00:45:01,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010844975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:45:01,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:45:01,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-24 00:45:01,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380674577] [2024-11-24 00:45:01,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:45:01,956 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-24 00:45:01,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:45:01,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-24 00:45:01,957 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-24 00:45:02,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 80 [2024-11-24 00:45:02,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 200 transitions, 2123 flow. Second operand has 12 states, 12 states have (on average 45.25) internal successors, (543), 12 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:02,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:45:02,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 80 [2024-11-24 00:45:02,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:45:08,362 INFO L124 PetriNetUnfolderBase]: 16379/30488 cut-off events. [2024-11-24 00:45:08,363 INFO L125 PetriNetUnfolderBase]: For 271055/274383 co-relation queries the response was YES. [2024-11-24 00:45:08,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163832 conditions, 30488 events. 16379/30488 cut-off events. For 271055/274383 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 262159 event pairs, 1039 based on Foata normal form. 727/30504 useless extension candidates. Maximal degree in co-relation 162498. Up to 5114 conditions per place. [2024-11-24 00:45:08,838 INFO L140 encePairwiseOnDemand]: 68/80 looper letters, 542 selfloop transitions, 493 changer transitions 4/1063 dead transitions. [2024-11-24 00:45:08,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 1063 transitions, 14642 flow [2024-11-24 00:45:08,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-24 00:45:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-24 00:45:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1759 transitions. [2024-11-24 00:45:08,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6282142857142857 [2024-11-24 00:45:08,841 INFO L175 Difference]: Start difference. First operand has 192 places, 200 transitions, 2123 flow. Second operand 35 states and 1759 transitions. [2024-11-24 00:45:08,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 1063 transitions, 14642 flow [2024-11-24 00:45:09,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 1063 transitions, 14274 flow, removed 79 selfloop flow, removed 1 redundant places. [2024-11-24 00:45:09,928 INFO L231 Difference]: Finished difference. Result has 253 places, 689 transitions, 9586 flow [2024-11-24 00:45:09,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=2080, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9586, PETRI_PLACES=253, PETRI_TRANSITIONS=689} [2024-11-24 00:45:09,929 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 174 predicate places. [2024-11-24 00:45:09,929 INFO L471 AbstractCegarLoop]: Abstraction has has 253 places, 689 transitions, 9586 flow [2024-11-24 00:45:09,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 45.25) internal successors, (543), 12 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:09,929 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:45:09,929 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] [2024-11-24 00:45:09,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-24 00:45:10,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-24 00:45:10,130 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:45:10,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:45:10,131 INFO L85 PathProgramCache]: Analyzing trace with hash -528848732, now seen corresponding path program 5 times [2024-11-24 00:45:10,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:45:10,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271680895] [2024-11-24 00:45:10,131 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:45:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:45:10,155 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 00:45:10,155 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:45:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:45:10,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:45:10,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271680895] [2024-11-24 00:45:10,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271680895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:45:10,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732811667] [2024-11-24 00:45:10,265 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-24 00:45:10,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:45:10,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:45:10,272 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:45:10,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-24 00:45:10,471 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-24 00:45:10,471 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:45:10,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:45:10,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:45:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:45:10,588 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:45:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:45:10,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732811667] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:45:10,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:45:10,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2024-11-24 00:45:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646444962] [2024-11-24 00:45:10,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:45:10,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:45:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:45:10,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:45:10,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-24 00:45:10,802 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:45:10,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 689 transitions, 9586 flow. Second operand has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:10,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:45:10,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:45:10,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:45:18,198 INFO L124 PetriNetUnfolderBase]: 13676/25350 cut-off events. [2024-11-24 00:45:18,199 INFO L125 PetriNetUnfolderBase]: For 472886/479939 co-relation queries the response was YES. [2024-11-24 00:45:18,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168291 conditions, 25350 events. 13676/25350 cut-off events. For 472886/479939 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 214373 event pairs, 2087 based on Foata normal form. 1242/25944 useless extension candidates. Maximal degree in co-relation 167073. Up to 6731 conditions per place. [2024-11-24 00:45:18,874 INFO L140 encePairwiseOnDemand]: 69/80 looper letters, 432 selfloop transitions, 415 changer transitions 0/881 dead transitions. [2024-11-24 00:45:18,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 881 transitions, 13978 flow [2024-11-24 00:45:18,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:45:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:45:18,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 431 transitions. [2024-11-24 00:45:18,875 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6734375 [2024-11-24 00:45:18,875 INFO L175 Difference]: Start difference. First operand has 253 places, 689 transitions, 9586 flow. Second operand 8 states and 431 transitions. [2024-11-24 00:45:18,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 881 transitions, 13978 flow [2024-11-24 00:45:22,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 881 transitions, 13805 flow, removed 58 selfloop flow, removed 1 redundant places. [2024-11-24 00:45:22,489 INFO L231 Difference]: Finished difference. Result has 263 places, 781 transitions, 12167 flow [2024-11-24 00:45:22,489 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=9449, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12167, PETRI_PLACES=263, PETRI_TRANSITIONS=781} [2024-11-24 00:45:22,490 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 184 predicate places. [2024-11-24 00:45:22,490 INFO L471 AbstractCegarLoop]: Abstraction has has 263 places, 781 transitions, 12167 flow [2024-11-24 00:45:22,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:22,490 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:45:22,490 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] [2024-11-24 00:45:22,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-24 00:45:22,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-24 00:45:22,690 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:45:22,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:45:22,691 INFO L85 PathProgramCache]: Analyzing trace with hash -474558010, now seen corresponding path program 6 times [2024-11-24 00:45:22,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:45:22,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900172340] [2024-11-24 00:45:22,691 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-24 00:45:22,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:45:22,703 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-24 00:45:22,703 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:45:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-24 00:45:22,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:45:22,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900172340] [2024-11-24 00:45:22,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900172340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-24 00:45:22,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-24 00:45:22,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-24 00:45:22,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252180809] [2024-11-24 00:45:22,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:45:22,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-24 00:45:22,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:45:22,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-24 00:45:22,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-24 00:45:22,821 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:45:22,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 781 transitions, 12167 flow. Second operand has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:22,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:45:22,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:45:22,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:45:30,094 INFO L124 PetriNetUnfolderBase]: 12641/23843 cut-off events. [2024-11-24 00:45:30,094 INFO L125 PetriNetUnfolderBase]: For 508819/516132 co-relation queries the response was YES. [2024-11-24 00:45:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169550 conditions, 23843 events. 12641/23843 cut-off events. For 508819/516132 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 202686 event pairs, 3448 based on Foata normal form. 776/23745 useless extension candidates. Maximal degree in co-relation 168398. Up to 11708 conditions per place. [2024-11-24 00:45:30,508 INFO L140 encePairwiseOnDemand]: 73/80 looper letters, 628 selfloop transitions, 222 changer transitions 20/977 dead transitions. [2024-11-24 00:45:30,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 977 transitions, 17130 flow [2024-11-24 00:45:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-24 00:45:30,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-24 00:45:30,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 336 transitions. [2024-11-24 00:45:30,509 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-24 00:45:30,509 INFO L175 Difference]: Start difference. First operand has 263 places, 781 transitions, 12167 flow. Second operand 6 states and 336 transitions. [2024-11-24 00:45:30,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 977 transitions, 17130 flow [2024-11-24 00:45:35,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 977 transitions, 17053 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-11-24 00:45:35,288 INFO L231 Difference]: Finished difference. Result has 265 places, 802 transitions, 13083 flow [2024-11-24 00:45:35,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=12098, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=13083, PETRI_PLACES=265, PETRI_TRANSITIONS=802} [2024-11-24 00:45:35,289 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 186 predicate places. [2024-11-24 00:45:35,289 INFO L471 AbstractCegarLoop]: Abstraction has has 265 places, 802 transitions, 13083 flow [2024-11-24 00:45:35,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 49.0) internal successors, (294), 6 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:35,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:45:35,290 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] [2024-11-24 00:45:35,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-24 00:45:35,290 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:45:35,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:45:35,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1859845636, now seen corresponding path program 7 times [2024-11-24 00:45:35,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:45:35,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234200575] [2024-11-24 00:45:35,291 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:45:35,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:45:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:45:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-24 00:45:35,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:45:35,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234200575] [2024-11-24 00:45:35,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234200575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:45:35,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6780937] [2024-11-24 00:45:35,455 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-24 00:45:35,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:45:35,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:45:35,458 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:45:35,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-24 00:45:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:45:35,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-24 00:45:35,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:45:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:45:35,790 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:45:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:45:35,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6780937] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-24 00:45:35,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-24 00:45:35,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-24 00:45:35,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140376273] [2024-11-24 00:45:35,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-24 00:45:35,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-24 00:45:35,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:45:35,948 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-24 00:45:35,948 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-24 00:45:36,077 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:45:36,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 802 transitions, 13083 flow. Second operand has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:36,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:45:36,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:45:36,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:45:44,067 INFO L124 PetriNetUnfolderBase]: 15028/27423 cut-off events. [2024-11-24 00:45:44,068 INFO L125 PetriNetUnfolderBase]: For 561040/568792 co-relation queries the response was YES. [2024-11-24 00:45:44,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191618 conditions, 27423 events. 15028/27423 cut-off events. For 561040/568792 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 230923 event pairs, 1986 based on Foata normal form. 1017/27771 useless extension candidates. Maximal degree in co-relation 190515. Up to 5413 conditions per place. [2024-11-24 00:45:44,784 INFO L140 encePairwiseOnDemand]: 70/80 looper letters, 459 selfloop transitions, 590 changer transitions 1/1084 dead transitions. [2024-11-24 00:45:44,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 1084 transitions, 19132 flow [2024-11-24 00:45:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-24 00:45:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-24 00:45:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 428 transitions. [2024-11-24 00:45:44,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-11-24 00:45:44,785 INFO L175 Difference]: Start difference. First operand has 265 places, 802 transitions, 13083 flow. Second operand 8 states and 428 transitions. [2024-11-24 00:45:44,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 1084 transitions, 19132 flow [2024-11-24 00:45:49,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1084 transitions, 18595 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-11-24 00:45:49,235 INFO L231 Difference]: Finished difference. Result has 272 places, 932 transitions, 16373 flow [2024-11-24 00:45:49,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=12430, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16373, PETRI_PLACES=272, PETRI_TRANSITIONS=932} [2024-11-24 00:45:49,236 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 193 predicate places. [2024-11-24 00:45:49,236 INFO L471 AbstractCegarLoop]: Abstraction has has 272 places, 932 transitions, 16373 flow [2024-11-24 00:45:49,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 47.285714285714285) internal successors, (331), 7 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:49,236 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:45:49,236 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-24 00:45:49,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-24 00:45:49,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-24 00:45:49,437 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:45:49,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:45:49,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1340916334, now seen corresponding path program 2 times [2024-11-24 00:45:49,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:45:49,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868016072] [2024-11-24 00:45:49,438 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:45:49,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:45:49,497 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:45:49,497 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:45:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:45:49,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:45:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868016072] [2024-11-24 00:45:49,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868016072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:45:49,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418752701] [2024-11-24 00:45:49,749 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-24 00:45:49,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:45:49,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:45:49,752 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:45:49,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-24 00:45:50,008 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-24 00:45:50,008 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-24 00:45:50,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-24 00:45:50,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:45:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:45:50,286 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:45:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-24 00:45:50,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418752701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:45:50,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:45:50,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2024-11-24 00:45:50,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23044877] [2024-11-24 00:45:50,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:45:50,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-24 00:45:50,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:45:50,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-24 00:45:50,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2024-11-24 00:45:50,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2024-11-24 00:45:50,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 932 transitions, 16373 flow. Second operand has 21 states, 21 states have (on average 46.333333333333336) internal successors, (973), 21 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:45:50,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:45:50,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2024-11-24 00:45:50,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-24 00:45:58,585 INFO L124 PetriNetUnfolderBase]: 13502/24277 cut-off events. [2024-11-24 00:45:58,585 INFO L125 PetriNetUnfolderBase]: For 576584/583309 co-relation queries the response was YES. [2024-11-24 00:45:58,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184612 conditions, 24277 events. 13502/24277 cut-off events. For 576584/583309 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 196415 event pairs, 3370 based on Foata normal form. 873/23922 useless extension candidates. Maximal degree in co-relation 183570. Up to 7867 conditions per place. [2024-11-24 00:45:59,308 INFO L140 encePairwiseOnDemand]: 63/80 looper letters, 997 selfloop transitions, 245 changer transitions 5/1437 dead transitions. [2024-11-24 00:45:59,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 1437 transitions, 28082 flow [2024-11-24 00:45:59,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-24 00:45:59,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-24 00:45:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 856 transitions. [2024-11-24 00:45:59,310 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-11-24 00:45:59,310 INFO L175 Difference]: Start difference. First operand has 272 places, 932 transitions, 16373 flow. Second operand 16 states and 856 transitions. [2024-11-24 00:45:59,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 1437 transitions, 28082 flow [2024-11-24 00:46:05,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1437 transitions, 27957 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-11-24 00:46:05,136 INFO L231 Difference]: Finished difference. Result has 289 places, 1031 transitions, 19991 flow [2024-11-24 00:46:05,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=16292, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19991, PETRI_PLACES=289, PETRI_TRANSITIONS=1031} [2024-11-24 00:46:05,137 INFO L279 CegarLoopForPetriNet]: 79 programPoint places, 210 predicate places. [2024-11-24 00:46:05,137 INFO L471 AbstractCegarLoop]: Abstraction has has 289 places, 1031 transitions, 19991 flow [2024-11-24 00:46:05,138 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 46.333333333333336) internal successors, (973), 21 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:46:05,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-24 00:46:05,138 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] [2024-11-24 00:46:05,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-24 00:46:05,338 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:46:05,338 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 50 more)] === [2024-11-24 00:46:05,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-24 00:46:05,339 INFO L85 PathProgramCache]: Analyzing trace with hash -54213097, now seen corresponding path program 1 times [2024-11-24 00:46:05,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-24 00:46:05,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148307604] [2024-11-24 00:46:05,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:46:05,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-24 00:46:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:46:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:46:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-24 00:46:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148307604] [2024-11-24 00:46:05,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148307604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-24 00:46:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476502266] [2024-11-24 00:46:05,628 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-24 00:46:05,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-24 00:46:05,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-24 00:46:05,633 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-24 00:46:05,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bdc32c47-9905-4362-80c6-f1b4d0a64945/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-24 00:46:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-24 00:46:05,846 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-24 00:46:05,849 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-24 00:46:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:46:06,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-24 00:46:06,292 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 36 treesize of output 32 [2024-11-24 00:46:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-24 00:46:06,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476502266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-24 00:46:06,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-24 00:46:06,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-24 00:46:06,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957438520] [2024-11-24 00:46:06,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-24 00:46:06,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-24 00:46:06,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-24 00:46:06,584 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-24 00:46:06,584 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-11-24 00:46:07,628 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2024-11-24 00:46:07,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 1031 transitions, 19991 flow. Second operand has 24 states, 24 states have (on average 46.833333333333336) internal successors, (1124), 24 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-24 00:46:07,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-24 00:46:07,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2024-11-24 00:46:07,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand