./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-sum.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_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/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_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/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_77d47507-7b6a-4cd6-b89d-df62d28ed487/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 c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:26:09,186 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:26:09,287 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:26:09,293 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:26:09,294 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:26:09,340 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:26:09,341 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:26:09,342 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:26:09,342 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:26:09,343 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:26:09,344 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:26:09,344 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:26:09,345 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:26:09,345 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:26:09,345 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:26:09,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:26:09,346 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:26:09,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:26:09,347 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:26:09,348 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:26:09,348 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:26:09,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:26:09,349 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:26:09,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:26:09,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:26:09,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:26:09,350 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:26:09,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:26:09,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:26:09,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:26:09,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:26:09,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:26:09,350 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:26:09,351 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:26:09,351 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:26:09,351 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:26:09,351 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:26:09,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:26:09,352 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_77d47507-7b6a-4cd6-b89d-df62d28ed487/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 -> c1d27b7f98ac68d2da6120346c107c87df7f6f708200f0d5d2c806741122116e [2024-11-23 23:26:09,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:26:09,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:26:09,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:26:09,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:26:09,686 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:26:09,688 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-23 23:26:13,027 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/data/0b2e7d10a/c97841494cf24fce85b4f9c658a81015/FLAGd45047dfa [2024-11-23 23:26:13,423 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:26:13,424 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/sv-benchmarks/c/weaver/popl20-three-array-sum.wvr.c [2024-11-23 23:26:13,434 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/data/0b2e7d10a/c97841494cf24fce85b4f9c658a81015/FLAGd45047dfa [2024-11-23 23:26:13,452 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/data/0b2e7d10a/c97841494cf24fce85b4f9c658a81015 [2024-11-23 23:26:13,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:26:13,457 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:26:13,459 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:26:13,459 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:26:13,465 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:26:13,466 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,467 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21491120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13, skipping insertion in model container [2024-11-23 23:26:13,468 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,488 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:26:13,758 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:26:13,764 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:26:13,780 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:26:13,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:26:13,856 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:26:13,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13 WrapperNode [2024-11-23 23:26:13,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:26:13,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:26:13,859 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:26:13,859 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:26:13,868 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,882 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,910 INFO L138 Inliner]: procedures = 25, calls = 30, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 137 [2024-11-23 23:26:13,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:26:13,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:26:13,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:26:13,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:26:13,922 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,926 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,953 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-23 23:26:13,954 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,966 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,967 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,972 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,974 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,975 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,978 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:26:13,979 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:26:13,979 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:26:13,980 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:26:13,981 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (1/1) ... [2024-11-23 23:26:13,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:26:14,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:14,019 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:26:14,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:26:14,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:26:14,058 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:26:14,058 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:26:14,059 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:26:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:26:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:26:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:26:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:26:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:26:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:26:14,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:26:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:26:14,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:26:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:26:14,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:26:14,062 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:26:14,184 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:26:14,188 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:26:14,920 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:26:14,921 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:26:15,540 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:26:15,541 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-23 23:26:15,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:26:15 BoogieIcfgContainer [2024-11-23 23:26:15,542 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:26:15,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:26:15,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:26:15,552 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:26:15,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:26:13" (1/3) ... [2024-11-23 23:26:15,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6fe84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:26:15, skipping insertion in model container [2024-11-23 23:26:15,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:26:13" (2/3) ... [2024-11-23 23:26:15,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c6fe84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:26:15, skipping insertion in model container [2024-11-23 23:26:15,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:26:15" (3/3) ... [2024-11-23 23:26:15,555 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-sum.wvr.c [2024-11-23 23:26:15,573 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:26:15,575 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-sum.wvr.c that has 4 procedures, 58 locations, 1 initial locations, 6 loop locations, and 20 error locations. [2024-11-23 23:26:15,576 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:26:15,701 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:26:15,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 64 transitions, 149 flow [2024-11-23 23:26:15,805 INFO L124 PetriNetUnfolderBase]: 7/61 cut-off events. [2024-11-23 23:26:15,808 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:26:15,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 61 events. 7/61 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 160 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-11-23 23:26:15,812 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 64 transitions, 149 flow [2024-11-23 23:26:15,816 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 63 places, 60 transitions, 138 flow [2024-11-23 23:26:15,826 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:26:15,843 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;@68bd324e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:26:15,844 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-23 23:26:15,852 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:26:15,853 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:26:15,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:26:15,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:15,854 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:26:15,856 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:15,863 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:15,864 INFO L85 PathProgramCache]: Analyzing trace with hash 601243, now seen corresponding path program 1 times [2024-11-23 23:26:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:15,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929653929] [2024-11-23 23:26:15,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:15,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:16,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:16,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:16,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929653929] [2024-11-23 23:26:16,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929653929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:26:16,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:26:16,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:26:16,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219919564] [2024-11-23 23:26:16,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:16,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:26:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:16,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:26:16,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:26:16,357 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-23 23:26:16,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:16,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:16,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-23 23:26:16,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:17,126 INFO L124 PetriNetUnfolderBase]: 1638/2505 cut-off events. [2024-11-23 23:26:17,126 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-11-23 23:26:17,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 2505 events. 1638/2505 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13838 event pairs, 1286 based on Foata normal form. 1/1821 useless extension candidates. Maximal degree in co-relation 4369. Up to 2234 conditions per place. [2024-11-23 23:26:17,222 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 38 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-23 23:26:17,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 208 flow [2024-11-23 23:26:17,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:26:17,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:26:17,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-11-23 23:26:17,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-23 23:26:17,245 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 138 flow. Second operand 3 states and 101 transitions. [2024-11-23 23:26:17,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 208 flow [2024-11-23 23:26:17,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 55 transitions, 196 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:26:17,263 INFO L231 Difference]: Finished difference. Result has 54 places, 55 transitions, 120 flow [2024-11-23 23:26:17,268 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2024-11-23 23:26:17,273 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -9 predicate places. [2024-11-23 23:26:17,273 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 120 flow [2024-11-23 23:26:17,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:17,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:17,274 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:26:17,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:26:17,278 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:17,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:17,279 INFO L85 PathProgramCache]: Analyzing trace with hash 601244, now seen corresponding path program 1 times [2024-11-23 23:26:17,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:17,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201836113] [2024-11-23 23:26:17,279 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:17,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:17,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:17,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201836113] [2024-11-23 23:26:17,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201836113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:26:17,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:26:17,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:26:17,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116265294] [2024-11-23 23:26:17,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:17,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:26:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:17,782 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:26:17,782 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:26:17,845 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-23 23:26:17,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:17,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:17,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-23 23:26:17,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:18,470 INFO L124 PetriNetUnfolderBase]: 1639/2508 cut-off events. [2024-11-23 23:26:18,470 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-23 23:26:18,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4806 conditions, 2508 events. 1639/2508 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 13877 event pairs, 1286 based on Foata normal form. 0/1820 useless extension candidates. Maximal degree in co-relation 4769. Up to 2247 conditions per place. [2024-11-23 23:26:18,496 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-23 23:26:18,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 58 transitions, 218 flow [2024-11-23 23:26:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:26:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:26:18,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-23 23:26:18,502 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48046875 [2024-11-23 23:26:18,502 INFO L175 Difference]: Start difference. First operand has 54 places, 55 transitions, 120 flow. Second operand 4 states and 123 transitions. [2024-11-23 23:26:18,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 58 transitions, 218 flow [2024-11-23 23:26:18,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:26:18,506 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 143 flow [2024-11-23 23:26:18,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-11-23 23:26:18,509 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -6 predicate places. [2024-11-23 23:26:18,509 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 143 flow [2024-11-23 23:26:18,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:18,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:18,509 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 23:26:18,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:26:18,511 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:18,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:18,513 INFO L85 PathProgramCache]: Analyzing trace with hash 18639657, now seen corresponding path program 1 times [2024-11-23 23:26:18,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:18,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803080748] [2024-11-23 23:26:18,514 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:18,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:18,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803080748] [2024-11-23 23:26:18,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803080748] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:26:18,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:26:18,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:26:18,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735682428] [2024-11-23 23:26:18,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:18,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:26:18,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:18,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:26:18,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:26:18,745 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-23 23:26:18,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:18,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:18,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-23 23:26:18,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:19,271 INFO L124 PetriNetUnfolderBase]: 1641/2518 cut-off events. [2024-11-23 23:26:19,272 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-23 23:26:19,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4832 conditions, 2518 events. 1641/2518 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 13962 event pairs, 1286 based on Foata normal form. 0/1831 useless extension candidates. Maximal degree in co-relation 4780. Up to 2245 conditions per place. [2024-11-23 23:26:19,293 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-23 23:26:19,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 261 flow [2024-11-23 23:26:19,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:26:19,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:26:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 141 transitions. [2024-11-23 23:26:19,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55078125 [2024-11-23 23:26:19,297 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 143 flow. Second operand 4 states and 141 transitions. [2024-11-23 23:26:19,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 261 flow [2024-11-23 23:26:19,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 258 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:26:19,302 INFO L231 Difference]: Finished difference. Result has 61 places, 64 transitions, 196 flow [2024-11-23 23:26:19,302 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=196, PETRI_PLACES=61, PETRI_TRANSITIONS=64} [2024-11-23 23:26:19,304 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, -2 predicate places. [2024-11-23 23:26:19,305 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 64 transitions, 196 flow [2024-11-23 23:26:19,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:19,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:19,305 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 23:26:19,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:26:19,306 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:19,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 577815323, now seen corresponding path program 1 times [2024-11-23 23:26:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:19,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373317512] [2024-11-23 23:26:19,308 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:19,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:19,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:19,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373317512] [2024-11-23 23:26:19,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373317512] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:19,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839796120] [2024-11-23 23:26:19,788 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:19,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:19,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:19,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:19,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:26:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:19,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:26:19,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:26:19,996 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 [2024-11-23 23:26:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:20,225 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:20,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839796120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:26:20,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:26:20,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 23:26:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425268959] [2024-11-23 23:26:20,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:26:20,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:26:20,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:20,383 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:26:20,383 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:26:20,572 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-23 23:26:20,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 64 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:20,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:20,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-23 23:26:20,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:21,303 INFO L124 PetriNetUnfolderBase]: 1642/2520 cut-off events. [2024-11-23 23:26:21,303 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-23 23:26:21,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4869 conditions, 2520 events. 1642/2520 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 13912 event pairs, 1286 based on Foata normal form. 0/1838 useless extension candidates. Maximal degree in co-relation 4785. Up to 2254 conditions per place. [2024-11-23 23:26:21,325 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 44 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-23 23:26:21,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 66 transitions, 315 flow [2024-11-23 23:26:21,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:26:21,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:26:21,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-11-23 23:26:21,329 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39453125 [2024-11-23 23:26:21,329 INFO L175 Difference]: Start difference. First operand has 61 places, 64 transitions, 196 flow. Second operand 8 states and 202 transitions. [2024-11-23 23:26:21,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 66 transitions, 315 flow [2024-11-23 23:26:21,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 66 transitions, 315 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 23:26:21,335 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 227 flow [2024-11-23 23:26:21,335 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=227, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-11-23 23:26:21,336 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 4 predicate places. [2024-11-23 23:26:21,336 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 227 flow [2024-11-23 23:26:21,336 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:21,336 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:21,336 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 23:26:21,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:26:21,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:21,537 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:21,538 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash 732406922, now seen corresponding path program 1 times [2024-11-23 23:26:21,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:21,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805215727] [2024-11-23 23:26:21,538 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:21,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:21,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:21,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:21,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805215727] [2024-11-23 23:26:21,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805215727] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:21,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360666160] [2024-11-23 23:26:21,809 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:21,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:21,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:21,812 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:21,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:26:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:21,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-23 23:26:21,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:26:21,910 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 [2024-11-23 23:26:22,092 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:26:22,094 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 [2024-11-23 23:26:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:22,133 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:22,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360666160] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:22,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:26:22,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-23 23:26:22,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027238375] [2024-11-23 23:26:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:22,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:26:22,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:22,278 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:26:22,278 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-23 23:26:22,377 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-23 23:26:22,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:22,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:22,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-23 23:26:22,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:23,340 INFO L124 PetriNetUnfolderBase]: 3276/5011 cut-off events. [2024-11-23 23:26:23,341 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-23 23:26:23,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9649 conditions, 5011 events. 3276/5011 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30853 event pairs, 2572 based on Foata normal form. 2/3655 useless extension candidates. Maximal degree in co-relation 4826. Up to 2248 conditions per place. [2024-11-23 23:26:23,388 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-23 23:26:23,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 99 transitions, 480 flow [2024-11-23 23:26:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:26:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:26:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 180 transitions. [2024-11-23 23:26:23,390 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-23 23:26:23,390 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 227 flow. Second operand 5 states and 180 transitions. [2024-11-23 23:26:23,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 99 transitions, 480 flow [2024-11-23 23:26:23,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 99 transitions, 438 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-23 23:26:23,395 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 221 flow [2024-11-23 23:26:23,395 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-11-23 23:26:23,396 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 2 predicate places. [2024-11-23 23:26:23,396 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 221 flow [2024-11-23 23:26:23,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:23,396 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:23,396 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:26:23,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:26:23,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:23,601 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:23,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:23,601 INFO L85 PathProgramCache]: Analyzing trace with hash -61948978, now seen corresponding path program 1 times [2024-11-23 23:26:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:23,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655895891] [2024-11-23 23:26:23,601 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:23,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:23,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:23,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655895891] [2024-11-23 23:26:23,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655895891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:26:23,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:26:23,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:26:23,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727594417] [2024-11-23 23:26:23,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:23,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:26:23,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:23,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:26:23,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:26:23,800 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:26:23,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:23,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:23,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:26:23,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:24,836 INFO L124 PetriNetUnfolderBase]: 4274/6607 cut-off events. [2024-11-23 23:26:24,836 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-23 23:26:24,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12755 conditions, 6607 events. 4274/6607 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41924 event pairs, 2475 based on Foata normal form. 0/4580 useless extension candidates. Maximal degree in co-relation 5865. Up to 2749 conditions per place. [2024-11-23 23:26:24,878 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 91 selfloop transitions, 14 changer transitions 0/118 dead transitions. [2024-11-23 23:26:24,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 545 flow [2024-11-23 23:26:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:26:24,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:26:24,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 228 transitions. [2024-11-23 23:26:24,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-11-23 23:26:24,880 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 221 flow. Second operand 6 states and 228 transitions. [2024-11-23 23:26:24,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 545 flow [2024-11-23 23:26:24,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:26:24,884 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 264 flow [2024-11-23 23:26:24,884 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-11-23 23:26:24,885 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 8 predicate places. [2024-11-23 23:26:24,885 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 264 flow [2024-11-23 23:26:24,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.4) internal successors, (112), 5 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:24,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:24,885 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-23 23:26:24,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-23 23:26:24,886 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:24,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -531565181, now seen corresponding path program 1 times [2024-11-23 23:26:24,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:24,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144883579] [2024-11-23 23:26:24,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:24,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:25,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:26:25,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144883579] [2024-11-23 23:26:25,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144883579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:25,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593637405] [2024-11-23 23:26:25,080 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:25,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:25,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:25,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:25,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:26:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:25,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:26:25,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:26:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:26:25,290 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:26:25,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593637405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:26:25,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:26:25,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:26:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376351090] [2024-11-23 23:26:25,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:26:25,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:26:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:25,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:26:25,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:26:25,520 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-23 23:26:25,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 264 flow. Second operand has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:25,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:25,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-23 23:26:25,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:27,091 INFO L124 PetriNetUnfolderBase]: 5560/9244 cut-off events. [2024-11-23 23:26:27,092 INFO L125 PetriNetUnfolderBase]: For 2389/2559 co-relation queries the response was YES. [2024-11-23 23:26:27,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19223 conditions, 9244 events. 5560/9244 cut-off events. For 2389/2559 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 65577 event pairs, 4567 based on Foata normal form. 2/6565 useless extension candidates. Maximal degree in co-relation 5997. Up to 5480 conditions per place. [2024-11-23 23:26:27,162 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 72 selfloop transitions, 29 changer transitions 0/115 dead transitions. [2024-11-23 23:26:27,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 115 transitions, 635 flow [2024-11-23 23:26:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:26:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:26:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 298 transitions. [2024-11-23 23:26:27,166 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-11-23 23:26:27,166 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 264 flow. Second operand 9 states and 298 transitions. [2024-11-23 23:26:27,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 115 transitions, 635 flow [2024-11-23 23:26:27,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 115 transitions, 614 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:26:27,186 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 410 flow [2024-11-23 23:26:27,187 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2024-11-23 23:26:27,189 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 16 predicate places. [2024-11-23 23:26:27,189 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 410 flow [2024-11-23 23:26:27,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.53846153846154) internal successors, (306), 13 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:27,190 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:27,190 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:26:27,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-23 23:26:27,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-23 23:26:27,394 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:27,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:27,395 INFO L85 PathProgramCache]: Analyzing trace with hash 543095514, now seen corresponding path program 1 times [2024-11-23 23:26:27,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:27,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206149291] [2024-11-23 23:26:27,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:27,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:27,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:27,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:27,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206149291] [2024-11-23 23:26:27,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206149291] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:26:27,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:26:27,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:26:27,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224792356] [2024-11-23 23:26:27,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:27,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:26:27,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:27,515 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:26:27,516 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:26:27,546 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:26:27,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 410 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:27,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:27,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:26:27,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:28,458 INFO L124 PetriNetUnfolderBase]: 4190/6505 cut-off events. [2024-11-23 23:26:28,458 INFO L125 PetriNetUnfolderBase]: For 1342/1670 co-relation queries the response was YES. [2024-11-23 23:26:28,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13663 conditions, 6505 events. 4190/6505 cut-off events. For 1342/1670 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 36455 event pairs, 3102 based on Foata normal form. 0/4833 useless extension candidates. Maximal degree in co-relation 5605. Up to 4925 conditions per place. [2024-11-23 23:26:28,508 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 80 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-11-23 23:26:28,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 702 flow [2024-11-23 23:26:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:26:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:26:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-23 23:26:28,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-23 23:26:28,511 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 410 flow. Second operand 6 states and 211 transitions. [2024-11-23 23:26:28,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 702 flow [2024-11-23 23:26:28,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 621 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-23 23:26:28,519 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 387 flow [2024-11-23 23:26:28,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=387, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-23 23:26:28,523 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 18 predicate places. [2024-11-23 23:26:28,523 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 387 flow [2024-11-23 23:26:28,523 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:28,523 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:28,524 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-23 23:26:28,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 23:26:28,524 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:28,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -168913308, now seen corresponding path program 2 times [2024-11-23 23:26:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:28,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301549288] [2024-11-23 23:26:28,525 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:26:28,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:28,572 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:26:28,573 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:26:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:26:28,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301549288] [2024-11-23 23:26:28,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301549288] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:28,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370320352] [2024-11-23 23:26:28,895 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:26:28,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:28,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:28,899 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:28,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:26:28,984 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:26:28,984 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:26:28,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-23 23:26:28,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:26:29,012 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 [2024-11-23 23:26:29,218 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:26:29,218 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 [2024-11-23 23:26:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:26:29,330 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:26:29,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370320352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:26:29,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:26:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2024-11-23 23:26:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298377568] [2024-11-23 23:26:29,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:26:29,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:26:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:29,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:26:29,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:26:30,254 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-23 23:26:30,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 387 flow. Second operand has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:30,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:30,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-23 23:26:30,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:32,400 INFO L124 PetriNetUnfolderBase]: 5994/9164 cut-off events. [2024-11-23 23:26:32,400 INFO L125 PetriNetUnfolderBase]: For 3144/3632 co-relation queries the response was YES. [2024-11-23 23:26:32,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20639 conditions, 9164 events. 5994/9164 cut-off events. For 3144/3632 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 58981 event pairs, 4932 based on Foata normal form. 4/7037 useless extension candidates. Maximal degree in co-relation 7476. Up to 5129 conditions per place. [2024-11-23 23:26:32,453 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 76 selfloop transitions, 35 changer transitions 0/123 dead transitions. [2024-11-23 23:26:32,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 771 flow [2024-11-23 23:26:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:26:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-23 23:26:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 309 transitions. [2024-11-23 23:26:32,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43892045454545453 [2024-11-23 23:26:32,456 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 387 flow. Second operand 11 states and 309 transitions. [2024-11-23 23:26:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 771 flow [2024-11-23 23:26:32,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 123 transitions, 720 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:26:32,471 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 467 flow [2024-11-23 23:26:32,471 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=467, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-11-23 23:26:32,472 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 23 predicate places. [2024-11-23 23:26:32,473 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 467 flow [2024-11-23 23:26:32,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.75) internal successors, (332), 16 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:32,473 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:32,473 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:26:32,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 23:26:32,677 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:32,678 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:32,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2100113463, now seen corresponding path program 1 times [2024-11-23 23:26:32,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:32,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169157577] [2024-11-23 23:26:32,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:32,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:26:32,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:32,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169157577] [2024-11-23 23:26:32,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169157577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:26:32,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:26:32,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:26:32,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136306763] [2024-11-23 23:26:32,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:32,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:26:32,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:32,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:26:32,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:26:32,825 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-23 23:26:32,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:32,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:32,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-23 23:26:32,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:33,731 INFO L124 PetriNetUnfolderBase]: 4789/7487 cut-off events. [2024-11-23 23:26:33,732 INFO L125 PetriNetUnfolderBase]: For 2620/2989 co-relation queries the response was YES. [2024-11-23 23:26:33,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16856 conditions, 7487 events. 4789/7487 cut-off events. For 2620/2989 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 46957 event pairs, 3876 based on Foata normal form. 0/6058 useless extension candidates. Maximal degree in co-relation 6045. Up to 6652 conditions per place. [2024-11-23 23:26:33,789 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 62 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-11-23 23:26:33,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 609 flow [2024-11-23 23:26:33,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:26:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:26:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-23 23:26:33,791 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.453125 [2024-11-23 23:26:33,791 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 467 flow. Second operand 4 states and 116 transitions. [2024-11-23 23:26:33,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 609 flow [2024-11-23 23:26:33,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 564 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-23 23:26:33,807 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 440 flow [2024-11-23 23:26:33,807 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=440, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2024-11-23 23:26:33,808 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-11-23 23:26:33,809 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 440 flow [2024-11-23 23:26:33,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:33,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:33,810 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:26:33,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:26:33,810 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:33,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1234710547, now seen corresponding path program 1 times [2024-11-23 23:26:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:33,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394553181] [2024-11-23 23:26:33,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:33,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:34,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:26:34,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:34,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394553181] [2024-11-23 23:26:34,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394553181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:26:34,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:26:34,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:26:34,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484726981] [2024-11-23 23:26:34,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:34,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:26:34,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:34,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:26:34,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:26:34,133 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-23 23:26:34,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:34,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:34,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-23 23:26:34,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:34,892 INFO L124 PetriNetUnfolderBase]: 4096/6379 cut-off events. [2024-11-23 23:26:34,892 INFO L125 PetriNetUnfolderBase]: For 2043/2370 co-relation queries the response was YES. [2024-11-23 23:26:34,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14299 conditions, 6379 events. 4096/6379 cut-off events. For 2043/2370 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 38925 event pairs, 3281 based on Foata normal form. 0/5248 useless extension candidates. Maximal degree in co-relation 5268. Up to 5671 conditions per place. [2024-11-23 23:26:34,945 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 58 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-11-23 23:26:34,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 83 transitions, 580 flow [2024-11-23 23:26:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:26:34,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:26:34,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-23 23:26:34,947 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.403125 [2024-11-23 23:26:34,947 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 440 flow. Second operand 5 states and 129 transitions. [2024-11-23 23:26:34,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 83 transitions, 580 flow [2024-11-23 23:26:34,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 83 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:26:34,960 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 452 flow [2024-11-23 23:26:34,960 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=452, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2024-11-23 23:26:34,961 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 20 predicate places. [2024-11-23 23:26:34,962 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 452 flow [2024-11-23 23:26:34,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:34,963 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:26:34,963 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:26:34,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-23 23:26:34,963 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:26:34,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:26:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1234710546, now seen corresponding path program 1 times [2024-11-23 23:26:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:26:34,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293646116] [2024-11-23 23:26:34,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:26:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:26:35,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:26:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293646116] [2024-11-23 23:26:35,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293646116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699585717] [2024-11-23 23:26:35,566 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:26:35,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:26:35,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:26:35,568 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:26:35,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:26:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:26:35,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-23 23:26:35,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:26:35,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:26:35,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:26:35,810 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:26:35,810 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 18 treesize of output 17 [2024-11-23 23:26:35,844 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:26:35,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:26:36,035 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-23 23:26:36,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-23 23:26:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:26:37,146 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:26:37,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:26:37,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699585717] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:26:37,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:26:37,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2024-11-23 23:26:37,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956487249] [2024-11-23 23:26:37,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:26:37,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:26:37,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:26:37,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:26:37,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-11-23 23:26:38,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:26:38,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 452 flow. Second operand has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:26:38,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:26:38,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:26:38,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:26:46,754 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:26:50,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:26:54,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:26:59,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:03,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:07,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:11,673 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:12,210 INFO L124 PetriNetUnfolderBase]: 6476/10648 cut-off events. [2024-11-23 23:27:12,210 INFO L125 PetriNetUnfolderBase]: For 3069/3492 co-relation queries the response was YES. [2024-11-23 23:27:12,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23456 conditions, 10648 events. 6476/10648 cut-off events. For 3069/3492 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 76802 event pairs, 3548 based on Foata normal form. 0/8310 useless extension candidates. Maximal degree in co-relation 8610. Up to 5413 conditions per place. [2024-11-23 23:27:12,271 INFO L140 encePairwiseOnDemand]: 54/64 looper letters, 90 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-11-23 23:27:12,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 125 transitions, 812 flow [2024-11-23 23:27:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:27:12,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:27:12,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-23 23:27:12,273 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111607142857143 [2024-11-23 23:27:12,273 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 452 flow. Second operand 7 states and 229 transitions. [2024-11-23 23:27:12,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 125 transitions, 812 flow [2024-11-23 23:27:12,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 794 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:27:12,293 INFO L231 Difference]: Finished difference. Result has 88 places, 87 transitions, 531 flow [2024-11-23 23:27:12,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=531, PETRI_PLACES=88, PETRI_TRANSITIONS=87} [2024-11-23 23:27:12,296 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 25 predicate places. [2024-11-23 23:27:12,296 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 87 transitions, 531 flow [2024-11-23 23:27:12,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.857142857142858) internal successors, (160), 7 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:12,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:27:12,297 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:27:12,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 23:27:12,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-23 23:27:12,498 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:27:12,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:12,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2100113462, now seen corresponding path program 1 times [2024-11-23 23:27:12,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:12,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755458882] [2024-11-23 23:27:12,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:12,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:27:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:12,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755458882] [2024-11-23 23:27:12,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755458882] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:27:12,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:27:12,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:27:12,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688577188] [2024-11-23 23:27:12,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:27:12,641 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:27:12,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:12,643 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:27:12,643 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:27:12,676 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:27:12,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 87 transitions, 531 flow. Second operand has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:12,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:27:12,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:27:12,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:27:13,455 INFO L124 PetriNetUnfolderBase]: 5527/8763 cut-off events. [2024-11-23 23:27:13,455 INFO L125 PetriNetUnfolderBase]: For 12163/13603 co-relation queries the response was YES. [2024-11-23 23:27:13,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22950 conditions, 8763 events. 5527/8763 cut-off events. For 12163/13603 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 55712 event pairs, 3790 based on Foata normal form. 0/7019 useless extension candidates. Maximal degree in co-relation 8149. Up to 6689 conditions per place. [2024-11-23 23:27:13,507 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 78 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2024-11-23 23:27:13,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 837 flow [2024-11-23 23:27:13,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:27:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:27:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-11-23 23:27:13,510 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5182291666666666 [2024-11-23 23:27:13,510 INFO L175 Difference]: Start difference. First operand has 88 places, 87 transitions, 531 flow. Second operand 6 states and 199 transitions. [2024-11-23 23:27:13,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 837 flow [2024-11-23 23:27:13,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 833 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:27:13,526 INFO L231 Difference]: Finished difference. Result has 94 places, 88 transitions, 585 flow [2024-11-23 23:27:13,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=585, PETRI_PLACES=94, PETRI_TRANSITIONS=88} [2024-11-23 23:27:13,527 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 31 predicate places. [2024-11-23 23:27:13,528 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 88 transitions, 585 flow [2024-11-23 23:27:13,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.4) internal successors, (117), 5 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:13,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:27:13,528 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:27:13,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:27:13,529 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:27:13,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:13,529 INFO L85 PathProgramCache]: Analyzing trace with hash 378679394, now seen corresponding path program 1 times [2024-11-23 23:27:13,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:13,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012672875] [2024-11-23 23:27:13,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:13,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:27:13,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012672875] [2024-11-23 23:27:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012672875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190250913] [2024-11-23 23:27:13,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:13,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:13,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:13,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:27:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:13,949 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:27:13,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:13,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:27:14,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:27:14,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 23:27:14,029 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:27:14,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:27:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:27:14,109 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:14,259 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 52 treesize of output 48 [2024-11-23 23:27:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:27:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190250913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:27:14,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:27:14,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:27:14,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438584965] [2024-11-23 23:27:14,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:27:14,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:27:14,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:14,353 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:27:14,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:27:14,673 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-23 23:27:14,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 88 transitions, 585 flow. Second operand has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:14,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:27:14,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-23 23:27:14,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:27:15,978 INFO L124 PetriNetUnfolderBase]: 6547/10770 cut-off events. [2024-11-23 23:27:15,978 INFO L125 PetriNetUnfolderBase]: For 9430/10777 co-relation queries the response was YES. [2024-11-23 23:27:16,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27694 conditions, 10770 events. 6547/10770 cut-off events. For 9430/10777 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 75336 event pairs, 3556 based on Foata normal form. 342/9279 useless extension candidates. Maximal degree in co-relation 15679. Up to 6165 conditions per place. [2024-11-23 23:27:16,043 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 89 selfloop transitions, 27 changer transitions 0/126 dead transitions. [2024-11-23 23:27:16,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 126 transitions, 951 flow [2024-11-23 23:27:16,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:27:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:27:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-11-23 23:27:16,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44921875 [2024-11-23 23:27:16,046 INFO L175 Difference]: Start difference. First operand has 94 places, 88 transitions, 585 flow. Second operand 8 states and 230 transitions. [2024-11-23 23:27:16,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 126 transitions, 951 flow [2024-11-23 23:27:16,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 126 transitions, 915 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:27:16,072 INFO L231 Difference]: Finished difference. Result has 99 places, 89 transitions, 618 flow [2024-11-23 23:27:16,072 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=618, PETRI_PLACES=99, PETRI_TRANSITIONS=89} [2024-11-23 23:27:16,073 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 36 predicate places. [2024-11-23 23:27:16,073 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 89 transitions, 618 flow [2024-11-23 23:27:16,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.46153846153846) internal successors, (266), 13 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:16,074 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:27:16,074 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:27:16,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-23 23:27:16,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:27:16,275 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:27:16,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:16,276 INFO L85 PathProgramCache]: Analyzing trace with hash 378679393, now seen corresponding path program 1 times [2024-11-23 23:27:16,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:16,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11876641] [2024-11-23 23:27:16,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:16,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:27:16,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:16,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11876641] [2024-11-23 23:27:16,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11876641] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:27:16,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:27:16,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:27:16,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58388298] [2024-11-23 23:27:16,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:27:16,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:27:16,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:16,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:27:16,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:27:16,471 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-23 23:27:16,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 89 transitions, 618 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:16,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:27:16,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-23 23:27:16,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:27:17,403 INFO L124 PetriNetUnfolderBase]: 4951/8472 cut-off events. [2024-11-23 23:27:17,403 INFO L125 PetriNetUnfolderBase]: For 16103/17069 co-relation queries the response was YES. [2024-11-23 23:27:17,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23886 conditions, 8472 events. 4951/8472 cut-off events. For 16103/17069 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 59264 event pairs, 3649 based on Foata normal form. 516/7743 useless extension candidates. Maximal degree in co-relation 13982. Up to 6724 conditions per place. [2024-11-23 23:27:17,450 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 60 selfloop transitions, 17 changer transitions 0/87 dead transitions. [2024-11-23 23:27:17,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 87 transitions, 768 flow [2024-11-23 23:27:17,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:27:17,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:27:17,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-23 23:27:17,452 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-11-23 23:27:17,452 INFO L175 Difference]: Start difference. First operand has 99 places, 89 transitions, 618 flow. Second operand 5 states and 128 transitions. [2024-11-23 23:27:17,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 87 transitions, 768 flow [2024-11-23 23:27:17,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 87 transitions, 727 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-23 23:27:17,469 INFO L231 Difference]: Finished difference. Result has 96 places, 87 transitions, 607 flow [2024-11-23 23:27:17,469 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=607, PETRI_PLACES=96, PETRI_TRANSITIONS=87} [2024-11-23 23:27:17,470 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 33 predicate places. [2024-11-23 23:27:17,470 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 87 transitions, 607 flow [2024-11-23 23:27:17,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:17,470 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:27:17,470 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:27:17,470 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 23:27:17,471 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:27:17,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:17,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1199340738, now seen corresponding path program 1 times [2024-11-23 23:27:17,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:17,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409201957] [2024-11-23 23:27:17,471 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:17,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:17,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:27:17,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409201957] [2024-11-23 23:27:17,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409201957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:17,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044580550] [2024-11-23 23:27:17,709 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:17,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:17,712 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:17,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:27:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:17,820 INFO L256 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 23:27:17,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:17,843 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 [2024-11-23 23:27:17,946 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:27:17,947 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 [2024-11-23 23:27:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:27:18,006 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:18,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:27:18,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044580550] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:18,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:27:18,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 12 [2024-11-23 23:27:18,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397136239] [2024-11-23 23:27:18,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:27:18,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:27:18,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:18,180 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:27:18,180 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:27:18,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-23 23:27:18,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 87 transitions, 607 flow. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:18,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:27:18,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-23 23:27:18,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:27:19,681 INFO L124 PetriNetUnfolderBase]: 7477/11974 cut-off events. [2024-11-23 23:27:19,681 INFO L125 PetriNetUnfolderBase]: For 17330/19292 co-relation queries the response was YES. [2024-11-23 23:27:19,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32761 conditions, 11974 events. 7477/11974 cut-off events. For 17330/19292 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 80783 event pairs, 3221 based on Foata normal form. 0/9991 useless extension candidates. Maximal degree in co-relation 18629. Up to 5682 conditions per place. [2024-11-23 23:27:19,750 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 98 selfloop transitions, 20 changer transitions 0/128 dead transitions. [2024-11-23 23:27:19,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 128 transitions, 1028 flow [2024-11-23 23:27:19,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:27:19,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:27:19,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 229 transitions. [2024-11-23 23:27:19,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5111607142857143 [2024-11-23 23:27:19,753 INFO L175 Difference]: Start difference. First operand has 96 places, 87 transitions, 607 flow. Second operand 7 states and 229 transitions. [2024-11-23 23:27:19,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 128 transitions, 1028 flow [2024-11-23 23:27:19,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1004 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:27:19,772 INFO L231 Difference]: Finished difference. Result has 101 places, 91 transitions, 672 flow [2024-11-23 23:27:19,773 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=672, PETRI_PLACES=101, PETRI_TRANSITIONS=91} [2024-11-23 23:27:19,773 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 38 predicate places. [2024-11-23 23:27:19,773 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 91 transitions, 672 flow [2024-11-23 23:27:19,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:19,773 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:27:19,773 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:27:19,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 23:27:19,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-23 23:27:19,975 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:27:19,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:27:19,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1199340742, now seen corresponding path program 1 times [2024-11-23 23:27:19,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:27:19,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694832525] [2024-11-23 23:27:19,976 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:19,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:27:20,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:27:20,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:27:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694832525] [2024-11-23 23:27:20,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694832525] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:20,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782016071] [2024-11-23 23:27:20,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:27:20,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:27:20,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:27:20,485 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:27:20,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:27:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:27:20,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-23 23:27:20,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:27:20,616 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 [2024-11-23 23:27:20,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:27:20,689 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:27:20,689 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 18 treesize of output 17 [2024-11-23 23:27:20,724 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:27:20,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:27:20,907 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-23 23:27:20,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-23 23:27:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:27:21,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:27:21,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:27:21,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782016071] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:27:21,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:27:21,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 16 [2024-11-23 23:27:21,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165575876] [2024-11-23 23:27:21,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:27:21,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:27:21,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:27:21,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:27:21,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:27:25,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:29,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:34,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:34,031 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-11-23 23:27:34,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 91 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:27:34,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:27:34,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-11-23 23:27:34,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:27:35,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:44,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:48,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:52,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:27:56,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:00,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:04,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:05,788 INFO L124 PetriNetUnfolderBase]: 10534/15541 cut-off events. [2024-11-23 23:28:05,788 INFO L125 PetriNetUnfolderBase]: For 22503/23163 co-relation queries the response was YES. [2024-11-23 23:28:05,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47596 conditions, 15541 events. 10534/15541 cut-off events. For 22503/23163 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 92171 event pairs, 3827 based on Foata normal form. 0/14179 useless extension candidates. Maximal degree in co-relation 26616. Up to 7644 conditions per place. [2024-11-23 23:28:05,869 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 93 selfloop transitions, 27 changer transitions 0/128 dead transitions. [2024-11-23 23:28:05,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 128 transitions, 1083 flow [2024-11-23 23:28:05,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:28:05,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:28:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-11-23 23:28:05,871 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-23 23:28:05,871 INFO L175 Difference]: Start difference. First operand has 101 places, 91 transitions, 672 flow. Second operand 7 states and 210 transitions. [2024-11-23 23:28:05,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 128 transitions, 1083 flow [2024-11-23 23:28:05,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 128 transitions, 1064 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:28:05,896 INFO L231 Difference]: Finished difference. Result has 105 places, 94 transitions, 760 flow [2024-11-23 23:28:05,897 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=760, PETRI_PLACES=105, PETRI_TRANSITIONS=94} [2024-11-23 23:28:05,898 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 42 predicate places. [2024-11-23 23:28:05,898 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 94 transitions, 760 flow [2024-11-23 23:28:05,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.285714285714285) internal successors, (149), 7 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:05,898 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:05,899 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:28:05,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-23 23:28:06,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:28:06,099 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:06,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:06,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1199340740, now seen corresponding path program 1 times [2024-11-23 23:28:06,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:06,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12448710] [2024-11-23 23:28:06,100 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:06,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:28:06,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:06,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12448710] [2024-11-23 23:28:06,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12448710] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:06,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487851126] [2024-11-23 23:28:06,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:06,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:06,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:06,323 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:06,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:28:06,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:06,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:28:06,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:06,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:28:06,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:28:06,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-23 23:28:06,500 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:28:06,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:28:06,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:28:06,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:06,724 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 52 treesize of output 48 [2024-11-23 23:28:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:28:06,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487851126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:06,814 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:06,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:28:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173729728] [2024-11-23 23:28:06,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:06,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:28:06,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:06,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:28:06,816 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:28:10,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:14,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:18,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:23,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:27,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-23 23:28:27,147 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2024-11-23 23:28:27,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 94 transitions, 760 flow. Second operand has 13 states, 13 states have (on average 19.53846153846154) internal successors, (254), 13 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:27,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:27,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2024-11-23 23:28:27,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:28,652 INFO L124 PetriNetUnfolderBase]: 6811/10831 cut-off events. [2024-11-23 23:28:28,653 INFO L125 PetriNetUnfolderBase]: For 30451/32293 co-relation queries the response was YES. [2024-11-23 23:28:28,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37874 conditions, 10831 events. 6811/10831 cut-off events. For 30451/32293 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 69499 event pairs, 2531 based on Foata normal form. 270/10465 useless extension candidates. Maximal degree in co-relation 21785. Up to 4861 conditions per place. [2024-11-23 23:28:28,718 INFO L140 encePairwiseOnDemand]: 51/64 looper letters, 103 selfloop transitions, 30 changer transitions 0/143 dead transitions. [2024-11-23 23:28:28,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 143 transitions, 1252 flow [2024-11-23 23:28:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:28:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:28:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-11-23 23:28:28,720 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4253472222222222 [2024-11-23 23:28:28,720 INFO L175 Difference]: Start difference. First operand has 105 places, 94 transitions, 760 flow. Second operand 9 states and 245 transitions. [2024-11-23 23:28:28,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 143 transitions, 1252 flow [2024-11-23 23:28:28,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 143 transitions, 1221 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:28:28,760 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 795 flow [2024-11-23 23:28:28,760 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=795, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2024-11-23 23:28:28,760 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 46 predicate places. [2024-11-23 23:28:28,761 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 795 flow [2024-11-23 23:28:28,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 19.53846153846154) internal successors, (254), 13 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:28,761 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:28,761 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:28:28,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-23 23:28:28,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-23 23:28:28,965 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:28,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:28,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1161301754, now seen corresponding path program 1 times [2024-11-23 23:28:28,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:28,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258118325] [2024-11-23 23:28:28,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:28,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:28:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258118325] [2024-11-23 23:28:29,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258118325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:29,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225407413] [2024-11-23 23:28:29,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:29,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:29,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:29,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:29,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:28:29,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:29,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:28:29,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:28:29,282 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:28:29,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225407413] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:29,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-23 23:28:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351171736] [2024-11-23 23:28:29,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:29,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:28:29,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:29,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:28:29,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:28:29,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:28:29,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 795 flow. Second operand has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:29,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:29,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:28:29,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:31,103 INFO L124 PetriNetUnfolderBase]: 7417/11224 cut-off events. [2024-11-23 23:28:31,103 INFO L125 PetriNetUnfolderBase]: For 39721/40183 co-relation queries the response was YES. [2024-11-23 23:28:31,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42013 conditions, 11224 events. 7417/11224 cut-off events. For 39721/40183 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 67326 event pairs, 3792 based on Foata normal form. 256/10859 useless extension candidates. Maximal degree in co-relation 23431. Up to 3677 conditions per place. [2024-11-23 23:28:31,173 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 126 selfloop transitions, 40 changer transitions 0/175 dead transitions. [2024-11-23 23:28:31,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 175 transitions, 1642 flow [2024-11-23 23:28:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:28:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:28:31,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 336 transitions. [2024-11-23 23:28:31,175 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-23 23:28:31,175 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 795 flow. Second operand 10 states and 336 transitions. [2024-11-23 23:28:31,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 175 transitions, 1642 flow [2024-11-23 23:28:31,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 175 transitions, 1538 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-11-23 23:28:31,221 INFO L231 Difference]: Finished difference. Result has 114 places, 98 transitions, 880 flow [2024-11-23 23:28:31,222 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=880, PETRI_PLACES=114, PETRI_TRANSITIONS=98} [2024-11-23 23:28:31,222 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2024-11-23 23:28:31,222 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 98 transitions, 880 flow [2024-11-23 23:28:31,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.357142857142858) internal successors, (327), 14 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:31,223 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:31,223 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:28:31,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:28:31,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:31,428 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:31,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:31,428 INFO L85 PathProgramCache]: Analyzing trace with hash 273671713, now seen corresponding path program 1 times [2024-11-23 23:28:31,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:31,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363975456] [2024-11-23 23:28:31,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:31,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:28:31,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:31,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363975456] [2024-11-23 23:28:31,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363975456] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:31,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744112472] [2024-11-23 23:28:31,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:31,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:31,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:31,584 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:28:31,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:31,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:28:31,692 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:31,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:28:31,789 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:28:31,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744112472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:31,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:31,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-23 23:28:31,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649563113] [2024-11-23 23:28:31,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:31,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:28:31,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:31,873 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:28:31,873 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:28:31,996 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:28:31,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 98 transitions, 880 flow. Second operand has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:31,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:31,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:28:31,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:33,419 INFO L124 PetriNetUnfolderBase]: 5352/8071 cut-off events. [2024-11-23 23:28:33,419 INFO L125 PetriNetUnfolderBase]: For 33533/34964 co-relation queries the response was YES. [2024-11-23 23:28:33,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31463 conditions, 8071 events. 5352/8071 cut-off events. For 33533/34964 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 44373 event pairs, 2768 based on Foata normal form. 152/7772 useless extension candidates. Maximal degree in co-relation 19040. Up to 3420 conditions per place. [2024-11-23 23:28:33,480 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 105 selfloop transitions, 42 changer transitions 0/156 dead transitions. [2024-11-23 23:28:33,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 156 transitions, 1500 flow [2024-11-23 23:28:33,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:28:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:28:33,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 325 transitions. [2024-11-23 23:28:33,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5078125 [2024-11-23 23:28:33,482 INFO L175 Difference]: Start difference. First operand has 114 places, 98 transitions, 880 flow. Second operand 10 states and 325 transitions. [2024-11-23 23:28:33,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 156 transitions, 1500 flow [2024-11-23 23:28:33,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 156 transitions, 1440 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-23 23:28:33,527 INFO L231 Difference]: Finished difference. Result has 121 places, 102 transitions, 991 flow [2024-11-23 23:28:33,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=991, PETRI_PLACES=121, PETRI_TRANSITIONS=102} [2024-11-23 23:28:33,528 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 58 predicate places. [2024-11-23 23:28:33,528 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 102 transitions, 991 flow [2024-11-23 23:28:33,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.571428571428573) internal successors, (330), 14 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:33,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:33,528 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] [2024-11-23 23:28:33,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-23 23:28:33,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:33,729 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:33,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash -357691223, now seen corresponding path program 1 times [2024-11-23 23:28:33,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:33,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084875700] [2024-11-23 23:28:33,730 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:28:33,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:33,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084875700] [2024-11-23 23:28:33,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084875700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:33,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630928377] [2024-11-23 23:28:33,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:33,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:33,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:33,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:33,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-23 23:28:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:34,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-23 23:28:34,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:34,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:28:34,218 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:28:34,218 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 [2024-11-23 23:28:34,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:28:34,324 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-23 23:28:34,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630928377] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:34,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:28:34,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-23 23:28:34,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693273091] [2024-11-23 23:28:34,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:28:34,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-23 23:28:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:34,526 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-23 23:28:34,526 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:28:34,675 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-23 23:28:34,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 102 transitions, 991 flow. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:34,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:34,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-23 23:28:34,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:35,770 INFO L124 PetriNetUnfolderBase]: 5572/9512 cut-off events. [2024-11-23 23:28:35,770 INFO L125 PetriNetUnfolderBase]: For 48922/50229 co-relation queries the response was YES. [2024-11-23 23:28:35,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36071 conditions, 9512 events. 5572/9512 cut-off events. For 48922/50229 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 64171 event pairs, 2405 based on Foata normal form. 0/8880 useless extension candidates. Maximal degree in co-relation 22108. Up to 4164 conditions per place. [2024-11-23 23:28:35,829 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 128 selfloop transitions, 18 changer transitions 0/156 dead transitions. [2024-11-23 23:28:35,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 156 transitions, 1721 flow [2024-11-23 23:28:35,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:28:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:28:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-11-23 23:28:35,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5133928571428571 [2024-11-23 23:28:35,831 INFO L175 Difference]: Start difference. First operand has 121 places, 102 transitions, 991 flow. Second operand 7 states and 230 transitions. [2024-11-23 23:28:35,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 156 transitions, 1721 flow [2024-11-23 23:28:35,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 156 transitions, 1654 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-23 23:28:35,866 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 997 flow [2024-11-23 23:28:35,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=997, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2024-11-23 23:28:35,867 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 60 predicate places. [2024-11-23 23:28:35,867 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 997 flow [2024-11-23 23:28:35,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 7 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:35,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:35,867 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] [2024-11-23 23:28:35,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-23 23:28:36,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:36,068 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:36,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:36,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1424632437, now seen corresponding path program 1 times [2024-11-23 23:28:36,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:36,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45258098] [2024-11-23 23:28:36,069 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:36,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:28:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:36,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45258098] [2024-11-23 23:28:36,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45258098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:28:36,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:28:36,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:28:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393976766] [2024-11-23 23:28:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:28:36,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:28:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:36,243 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:28:36,243 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:28:36,243 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-23 23:28:36,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 997 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:36,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:36,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-23 23:28:36,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:37,137 INFO L124 PetriNetUnfolderBase]: 5883/9948 cut-off events. [2024-11-23 23:28:37,137 INFO L125 PetriNetUnfolderBase]: For 53678/54973 co-relation queries the response was YES. [2024-11-23 23:28:37,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39759 conditions, 9948 events. 5883/9948 cut-off events. For 53678/54973 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 64724 event pairs, 1696 based on Foata normal form. 8/9619 useless extension candidates. Maximal degree in co-relation 23050. Up to 5557 conditions per place. [2024-11-23 23:28:37,200 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 98 selfloop transitions, 3 changer transitions 23/134 dead transitions. [2024-11-23 23:28:37,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 134 transitions, 1469 flow [2024-11-23 23:28:37,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:28:37,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:28:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-23 23:28:37,201 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-23 23:28:37,201 INFO L175 Difference]: Start difference. First operand has 123 places, 104 transitions, 997 flow. Second operand 3 states and 124 transitions. [2024-11-23 23:28:37,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 134 transitions, 1469 flow [2024-11-23 23:28:37,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 134 transitions, 1445 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-23 23:28:37,256 INFO L231 Difference]: Finished difference. Result has 121 places, 84 transitions, 640 flow [2024-11-23 23:28:37,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=640, PETRI_PLACES=121, PETRI_TRANSITIONS=84} [2024-11-23 23:28:37,257 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 58 predicate places. [2024-11-23 23:28:37,257 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 84 transitions, 640 flow [2024-11-23 23:28:37,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:37,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:37,257 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:28:37,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-23 23:28:37,257 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:37,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash 53444039, now seen corresponding path program 2 times [2024-11-23 23:28:37,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:37,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957123941] [2024-11-23 23:28:37,258 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:28:37,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:37,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:28:37,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:37,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-23 23:28:37,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957123941] [2024-11-23 23:28:37,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957123941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:37,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754934232] [2024-11-23 23:28:37,718 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:28:37,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:37,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:37,721 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:37,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-23 23:28:37,863 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:28:37,863 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:37,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-23 23:28:37,869 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:37,880 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 [2024-11-23 23:28:37,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:28:38,069 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:28:38,069 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 23 treesize of output 20 [2024-11-23 23:28:38,094 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:28:38,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:28:38,207 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-23 23:28:38,208 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 [2024-11-23 23:28:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:28:38,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:28:39,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754934232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:39,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:39,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-23 23:28:39,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385800027] [2024-11-23 23:28:39,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:39,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 23:28:39,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:39,184 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 23:28:39,184 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2024-11-23 23:28:40,548 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 64 [2024-11-23 23:28:40,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 84 transitions, 640 flow. Second operand has 24 states, 24 states have (on average 15.333333333333334) internal successors, (368), 24 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:40,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:40,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 64 [2024-11-23 23:28:40,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:44,553 INFO L124 PetriNetUnfolderBase]: 6212/9760 cut-off events. [2024-11-23 23:28:44,553 INFO L125 PetriNetUnfolderBase]: For 37555/38216 co-relation queries the response was YES. [2024-11-23 23:28:44,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37442 conditions, 9760 events. 6212/9760 cut-off events. For 37555/38216 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 60671 event pairs, 1114 based on Foata normal form. 306/9713 useless extension candidates. Maximal degree in co-relation 29107. Up to 1664 conditions per place. [2024-11-23 23:28:44,627 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 205 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-11-23 23:28:44,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 241 transitions, 1995 flow [2024-11-23 23:28:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-23 23:28:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-23 23:28:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 450 transitions. [2024-11-23 23:28:44,629 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37006578947368424 [2024-11-23 23:28:44,629 INFO L175 Difference]: Start difference. First operand has 121 places, 84 transitions, 640 flow. Second operand 19 states and 450 transitions. [2024-11-23 23:28:44,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 241 transitions, 1995 flow [2024-11-23 23:28:44,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 241 transitions, 1735 flow, removed 44 selfloop flow, removed 18 redundant places. [2024-11-23 23:28:44,669 INFO L231 Difference]: Finished difference. Result has 115 places, 83 transitions, 556 flow [2024-11-23 23:28:44,669 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=556, PETRI_PLACES=115, PETRI_TRANSITIONS=83} [2024-11-23 23:28:44,669 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 52 predicate places. [2024-11-23 23:28:44,669 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 83 transitions, 556 flow [2024-11-23 23:28:44,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 15.333333333333334) internal successors, (368), 24 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:44,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:44,670 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:28:44,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-23 23:28:44,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-23 23:28:44,870 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:44,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:44,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1656765865, now seen corresponding path program 1 times [2024-11-23 23:28:44,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:44,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293796111] [2024-11-23 23:28:44,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:44,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:28:45,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:45,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293796111] [2024-11-23 23:28:45,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293796111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:45,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199615231] [2024-11-23 23:28:45,202 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:45,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:45,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:45,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:45,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-23 23:28:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:45,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-23 23:28:45,328 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:45,356 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 [2024-11-23 23:28:45,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:28:45,443 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:28:45,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:28:45,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-23 23:28:46,031 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:28:46,032 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 23:28:46,500 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:28:46,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199615231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:46,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:46,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2024-11-23 23:28:46,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514147029] [2024-11-23 23:28:46,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:46,501 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:28:46,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:46,502 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:28:46,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:28:46,960 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 64 [2024-11-23 23:28:46,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 83 transitions, 556 flow. Second operand has 21 states, 21 states have (on average 17.428571428571427) internal successors, (366), 21 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:46,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:46,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 64 [2024-11-23 23:28:46,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:49,018 INFO L124 PetriNetUnfolderBase]: 5309/8645 cut-off events. [2024-11-23 23:28:49,018 INFO L125 PetriNetUnfolderBase]: For 25805/26062 co-relation queries the response was YES. [2024-11-23 23:28:49,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30785 conditions, 8645 events. 5309/8645 cut-off events. For 25805/26062 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 53883 event pairs, 2550 based on Foata normal form. 146/8205 useless extension candidates. Maximal degree in co-relation 22769. Up to 3355 conditions per place. [2024-11-23 23:28:49,080 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 119 selfloop transitions, 20 changer transitions 0/149 dead transitions. [2024-11-23 23:28:49,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 149 transitions, 1148 flow [2024-11-23 23:28:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:28:49,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-23 23:28:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 313 transitions. [2024-11-23 23:28:49,082 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3762019230769231 [2024-11-23 23:28:49,082 INFO L175 Difference]: Start difference. First operand has 115 places, 83 transitions, 556 flow. Second operand 13 states and 313 transitions. [2024-11-23 23:28:49,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 149 transitions, 1148 flow [2024-11-23 23:28:49,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 149 transitions, 1084 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-11-23 23:28:49,115 INFO L231 Difference]: Finished difference. Result has 114 places, 83 transitions, 537 flow [2024-11-23 23:28:49,116 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=537, PETRI_PLACES=114, PETRI_TRANSITIONS=83} [2024-11-23 23:28:49,116 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 51 predicate places. [2024-11-23 23:28:49,116 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 83 transitions, 537 flow [2024-11-23 23:28:49,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 17.428571428571427) internal successors, (366), 21 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:49,117 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:49,117 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:28:49,126 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-23 23:28:49,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:49,321 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:49,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:49,322 INFO L85 PathProgramCache]: Analyzing trace with hash -586725726, now seen corresponding path program 2 times [2024-11-23 23:28:49,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:49,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551954602] [2024-11-23 23:28:49,322 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:28:49,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:49,353 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:28:49,353 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-23 23:28:49,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:49,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551954602] [2024-11-23 23:28:49,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551954602] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:49,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847927554] [2024-11-23 23:28:49,748 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:28:49,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:49,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:49,751 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:49,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-23 23:28:49,878 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:28:49,878 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:28:49,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-23 23:28:49,883 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:49,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:28:49,897 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 [2024-11-23 23:28:50,060 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:28:50,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:28:50,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-11-23 23:28:50,195 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-23 23:28:50,196 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 [2024-11-23 23:28:50,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:28:50,638 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:28:51,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847927554] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:51,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:51,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2024-11-23 23:28:51,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638854527] [2024-11-23 23:28:51,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:51,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-23 23:28:51,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:51,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-23 23:28:51,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-11-23 23:28:53,157 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 64 [2024-11-23 23:28:53,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 83 transitions, 537 flow. Second operand has 25 states, 25 states have (on average 16.48) internal successors, (412), 25 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:53,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:53,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 64 [2024-11-23 23:28:53,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:28:56,756 INFO L124 PetriNetUnfolderBase]: 7470/10962 cut-off events. [2024-11-23 23:28:56,756 INFO L125 PetriNetUnfolderBase]: For 29139/29581 co-relation queries the response was YES. [2024-11-23 23:28:56,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40074 conditions, 10962 events. 7470/10962 cut-off events. For 29139/29581 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 62197 event pairs, 779 based on Foata normal form. 292/10653 useless extension candidates. Maximal degree in co-relation 31815. Up to 2605 conditions per place. [2024-11-23 23:28:56,971 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 209 selfloop transitions, 28 changer transitions 0/247 dead transitions. [2024-11-23 23:28:56,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 247 transitions, 1916 flow [2024-11-23 23:28:56,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-23 23:28:56,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-23 23:28:56,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 449 transitions. [2024-11-23 23:28:56,973 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3692434210526316 [2024-11-23 23:28:56,973 INFO L175 Difference]: Start difference. First operand has 114 places, 83 transitions, 537 flow. Second operand 19 states and 449 transitions. [2024-11-23 23:28:56,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 247 transitions, 1916 flow [2024-11-23 23:28:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 247 transitions, 1828 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-23 23:28:56,993 INFO L231 Difference]: Finished difference. Result has 124 places, 86 transitions, 576 flow [2024-11-23 23:28:56,993 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=576, PETRI_PLACES=124, PETRI_TRANSITIONS=86} [2024-11-23 23:28:56,994 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 61 predicate places. [2024-11-23 23:28:56,994 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 86 transitions, 576 flow [2024-11-23 23:28:56,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.48) internal successors, (412), 25 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:56,994 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:28:56,994 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:28:57,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-23 23:28:57,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-23 23:28:57,195 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:28:57,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:28:57,195 INFO L85 PathProgramCache]: Analyzing trace with hash -586725724, now seen corresponding path program 1 times [2024-11-23 23:28:57,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:28:57,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590588591] [2024-11-23 23:28:57,196 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:57,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:28:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:28:57,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:28:57,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590588591] [2024-11-23 23:28:57,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590588591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:28:57,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409999974] [2024-11-23 23:28:57,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:28:57,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:28:57,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:28:57,543 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:28:57,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-23 23:28:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:28:57,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-23 23:28:57,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:28:57,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:28:57,741 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 [2024-11-23 23:28:57,837 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:28:57,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:28:57,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-23 23:28:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-23 23:28:58,428 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:28:58,966 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 23:28:58,973 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:28:58,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409999974] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:28:58,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:28:58,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2024-11-23 23:28:58,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801077091] [2024-11-23 23:28:58,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:28:58,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:28:58,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:28:58,975 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:28:58,975 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:28:59,503 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 64 [2024-11-23 23:28:59,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 86 transitions, 576 flow. Second operand has 21 states, 21 states have (on average 18.571428571428573) internal successors, (390), 21 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:28:59,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:28:59,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 64 [2024-11-23 23:28:59,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:01,365 INFO L124 PetriNetUnfolderBase]: 5824/9280 cut-off events. [2024-11-23 23:29:01,365 INFO L125 PetriNetUnfolderBase]: For 24290/24683 co-relation queries the response was YES. [2024-11-23 23:29:01,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33386 conditions, 9280 events. 5824/9280 cut-off events. For 24290/24683 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 56325 event pairs, 1689 based on Foata normal form. 146/8721 useless extension candidates. Maximal degree in co-relation 25787. Up to 2441 conditions per place. [2024-11-23 23:29:01,461 INFO L140 encePairwiseOnDemand]: 51/64 looper letters, 152 selfloop transitions, 25 changer transitions 0/190 dead transitions. [2024-11-23 23:29:01,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 1476 flow [2024-11-23 23:29:01,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:29:01,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 23:29:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 375 transitions. [2024-11-23 23:29:01,463 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.390625 [2024-11-23 23:29:01,463 INFO L175 Difference]: Start difference. First operand has 124 places, 86 transitions, 576 flow. Second operand 15 states and 375 transitions. [2024-11-23 23:29:01,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 1476 flow [2024-11-23 23:29:01,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 190 transitions, 1412 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-11-23 23:29:01,506 INFO L231 Difference]: Finished difference. Result has 126 places, 89 transitions, 601 flow [2024-11-23 23:29:01,508 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=601, PETRI_PLACES=126, PETRI_TRANSITIONS=89} [2024-11-23 23:29:01,508 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 63 predicate places. [2024-11-23 23:29:01,508 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 89 transitions, 601 flow [2024-11-23 23:29:01,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 18.571428571428573) internal successors, (390), 21 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:01,509 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:01,509 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:01,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-23 23:29:01,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-23 23:29:01,709 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:01,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:01,710 INFO L85 PathProgramCache]: Analyzing trace with hash -586725722, now seen corresponding path program 1 times [2024-11-23 23:29:01,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:01,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9126373] [2024-11-23 23:29:01,710 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:01,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:01,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:29:02,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9126373] [2024-11-23 23:29:02,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9126373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:02,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371820957] [2024-11-23 23:29:02,001 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:02,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:02,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:02,005 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:02,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-23 23:29:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:02,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 23:29:02,148 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:29:02,298 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:02,405 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 [2024-11-23 23:29:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:29:02,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371820957] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:02,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:02,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-23 23:29:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601972684] [2024-11-23 23:29:02,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:02,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-23 23:29:02,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:02,454 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-23 23:29:02,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-23 23:29:02,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-23 23:29:02,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 89 transitions, 601 flow. Second operand has 20 states, 20 states have (on average 24.25) internal successors, (485), 20 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:02,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:02,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-23 23:29:02,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:04,607 INFO L124 PetriNetUnfolderBase]: 5480/8940 cut-off events. [2024-11-23 23:29:04,607 INFO L125 PetriNetUnfolderBase]: For 21294/21536 co-relation queries the response was YES. [2024-11-23 23:29:04,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32650 conditions, 8940 events. 5480/8940 cut-off events. For 21294/21536 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 55433 event pairs, 1979 based on Foata normal form. 0/8408 useless extension candidates. Maximal degree in co-relation 25532. Up to 2962 conditions per place. [2024-11-23 23:29:04,681 INFO L140 encePairwiseOnDemand]: 52/64 looper letters, 152 selfloop transitions, 24 changer transitions 0/189 dead transitions. [2024-11-23 23:29:04,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 189 transitions, 1475 flow [2024-11-23 23:29:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-23 23:29:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-23 23:29:04,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 352 transitions. [2024-11-23 23:29:04,683 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-23 23:29:04,683 INFO L175 Difference]: Start difference. First operand has 126 places, 89 transitions, 601 flow. Second operand 10 states and 352 transitions. [2024-11-23 23:29:04,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 189 transitions, 1475 flow [2024-11-23 23:29:04,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 189 transitions, 1436 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-11-23 23:29:04,726 INFO L231 Difference]: Finished difference. Result has 123 places, 88 transitions, 602 flow [2024-11-23 23:29:04,726 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=602, PETRI_PLACES=123, PETRI_TRANSITIONS=88} [2024-11-23 23:29:04,726 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 60 predicate places. [2024-11-23 23:29:04,726 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 88 transitions, 602 flow [2024-11-23 23:29:04,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 24.25) internal successors, (485), 20 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:04,727 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:04,727 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:04,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-23 23:29:04,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-23 23:29:04,927 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:04,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:04,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1420602802, now seen corresponding path program 1 times [2024-11-23 23:29:04,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:04,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222745406] [2024-11-23 23:29:04,928 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:04,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:29:05,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222745406] [2024-11-23 23:29:05,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222745406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:05,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708175784] [2024-11-23 23:29:05,079 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:05,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:05,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:05,082 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:05,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-23 23:29:05,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:05,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 23:29:05,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:05,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:29:05,360 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:29:05,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708175784] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:05,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:05,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-23 23:29:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781983354] [2024-11-23 23:29:05,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:05,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:29:05,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:05,468 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:29:05,468 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:29:05,582 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:29:05,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 88 transitions, 602 flow. Second operand has 14 states, 14 states have (on average 23.714285714285715) internal successors, (332), 14 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:05,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:05,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:29:05,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:06,805 INFO L124 PetriNetUnfolderBase]: 6570/10317 cut-off events. [2024-11-23 23:29:06,805 INFO L125 PetriNetUnfolderBase]: For 36498/36939 co-relation queries the response was YES. [2024-11-23 23:29:06,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38407 conditions, 10317 events. 6570/10317 cut-off events. For 36498/36939 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 61238 event pairs, 3134 based on Foata normal form. 0/9444 useless extension candidates. Maximal degree in co-relation 31264. Up to 5569 conditions per place. [2024-11-23 23:29:06,894 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 138 selfloop transitions, 24 changer transitions 1/175 dead transitions. [2024-11-23 23:29:06,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 175 transitions, 1480 flow [2024-11-23 23:29:06,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-23 23:29:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-23 23:29:06,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 380 transitions. [2024-11-23 23:29:06,896 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-11-23 23:29:06,896 INFO L175 Difference]: Start difference. First operand has 123 places, 88 transitions, 602 flow. Second operand 12 states and 380 transitions. [2024-11-23 23:29:06,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 175 transitions, 1480 flow [2024-11-23 23:29:06,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 175 transitions, 1404 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-23 23:29:06,921 INFO L231 Difference]: Finished difference. Result has 128 places, 92 transitions, 629 flow [2024-11-23 23:29:06,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=629, PETRI_PLACES=128, PETRI_TRANSITIONS=92} [2024-11-23 23:29:06,921 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 65 predicate places. [2024-11-23 23:29:06,921 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 92 transitions, 629 flow [2024-11-23 23:29:06,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.714285714285715) internal successors, (332), 14 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:06,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:06,922 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:06,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-23 23:29:07,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-23 23:29:07,126 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:07,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1051636829, now seen corresponding path program 2 times [2024-11-23 23:29:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929067430] [2024-11-23 23:29:07,127 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:07,162 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:07,162 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:07,326 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:29:07,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929067430] [2024-11-23 23:29:07,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929067430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:07,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561507559] [2024-11-23 23:29:07,326 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:07,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:07,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:07,329 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:07,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-23 23:29:07,482 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:07,482 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:07,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:29:07,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:07,615 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:29:07,615 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:29:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561507559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:07,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-23 23:29:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793950068] [2024-11-23 23:29:07,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:07,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:29:07,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:07,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:29:07,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:29:07,911 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:29:07,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 92 transitions, 629 flow. Second operand has 18 states, 18 states have (on average 23.333333333333332) internal successors, (420), 18 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:07,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:07,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:29:07,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:10,151 INFO L124 PetriNetUnfolderBase]: 11185/17295 cut-off events. [2024-11-23 23:29:10,151 INFO L125 PetriNetUnfolderBase]: For 51967/52363 co-relation queries the response was YES. [2024-11-23 23:29:10,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66503 conditions, 17295 events. 11185/17295 cut-off events. For 51967/52363 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 108909 event pairs, 5292 based on Foata normal form. 12/16494 useless extension candidates. Maximal degree in co-relation 37537. Up to 7332 conditions per place. [2024-11-23 23:29:10,272 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 189 selfloop transitions, 46 changer transitions 0/245 dead transitions. [2024-11-23 23:29:10,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 245 transitions, 2135 flow [2024-11-23 23:29:10,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:29:10,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-23 23:29:10,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 425 transitions. [2024-11-23 23:29:10,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5108173076923077 [2024-11-23 23:29:10,274 INFO L175 Difference]: Start difference. First operand has 128 places, 92 transitions, 629 flow. Second operand 13 states and 425 transitions. [2024-11-23 23:29:10,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 245 transitions, 2135 flow [2024-11-23 23:29:10,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 245 transitions, 2089 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-23 23:29:10,326 INFO L231 Difference]: Finished difference. Result has 140 places, 117 transitions, 953 flow [2024-11-23 23:29:10,326 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=953, PETRI_PLACES=140, PETRI_TRANSITIONS=117} [2024-11-23 23:29:10,327 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 77 predicate places. [2024-11-23 23:29:10,327 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 117 transitions, 953 flow [2024-11-23 23:29:10,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.333333333333332) internal successors, (420), 18 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:10,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:10,327 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:10,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-23 23:29:10,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-23 23:29:10,528 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:10,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1371572669, now seen corresponding path program 2 times [2024-11-23 23:29:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:10,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783900660] [2024-11-23 23:29:10,528 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:10,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:10,545 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 23:29:10,545 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-23 23:29:10,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:10,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783900660] [2024-11-23 23:29:10,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783900660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:10,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:10,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:29:10,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992603897] [2024-11-23 23:29:10,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:10,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:10,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:10,755 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:10,755 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:29:10,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 64 [2024-11-23 23:29:10,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 117 transitions, 953 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:10,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:10,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 64 [2024-11-23 23:29:10,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:12,989 INFO L124 PetriNetUnfolderBase]: 8130/13210 cut-off events. [2024-11-23 23:29:12,989 INFO L125 PetriNetUnfolderBase]: For 52213/52568 co-relation queries the response was YES. [2024-11-23 23:29:13,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53959 conditions, 13210 events. 8130/13210 cut-off events. For 52213/52568 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 85584 event pairs, 5761 based on Foata normal form. 252/12931 useless extension candidates. Maximal degree in co-relation 45582. Up to 10837 conditions per place. [2024-11-23 23:29:13,096 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 91 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2024-11-23 23:29:13,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 116 transitions, 1153 flow [2024-11-23 23:29:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:29:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:29:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-11-23 23:29:13,097 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4348958333333333 [2024-11-23 23:29:13,097 INFO L175 Difference]: Start difference. First operand has 140 places, 117 transitions, 953 flow. Second operand 6 states and 167 transitions. [2024-11-23 23:29:13,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 116 transitions, 1153 flow [2024-11-23 23:29:13,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 116 transitions, 1153 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-23 23:29:13,157 INFO L231 Difference]: Finished difference. Result has 144 places, 116 transitions, 971 flow [2024-11-23 23:29:13,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=971, PETRI_PLACES=144, PETRI_TRANSITIONS=116} [2024-11-23 23:29:13,157 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 81 predicate places. [2024-11-23 23:29:13,157 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 116 transitions, 971 flow [2024-11-23 23:29:13,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:13,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:13,158 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:13,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-23 23:29:13,158 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:13,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:13,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1371572667, now seen corresponding path program 2 times [2024-11-23 23:29:13,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:13,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171106508] [2024-11-23 23:29:13,159 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:13,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:13,191 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:13,192 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:29:13,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:13,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171106508] [2024-11-23 23:29:13,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171106508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:13,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509756026] [2024-11-23 23:29:13,372 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:13,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:13,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:13,375 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:13,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-23 23:29:13,521 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:13,521 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:13,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:29:13,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:29:13,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:13,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-23 23:29:13,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509756026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:13,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:13,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-23 23:29:13,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395096375] [2024-11-23 23:29:13,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:13,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:29:13,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:13,840 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:29:13,840 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:29:13,933 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:29:13,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 116 transitions, 971 flow. Second operand has 18 states, 18 states have (on average 23.444444444444443) internal successors, (422), 18 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:13,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:13,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:29:13,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:15,833 INFO L124 PetriNetUnfolderBase]: 9308/14282 cut-off events. [2024-11-23 23:29:15,833 INFO L125 PetriNetUnfolderBase]: For 53355/53899 co-relation queries the response was YES. [2024-11-23 23:29:15,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58763 conditions, 14282 events. 9308/14282 cut-off events. For 53355/53899 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 85043 event pairs, 4348 based on Foata normal form. 0/13541 useless extension candidates. Maximal degree in co-relation 49856. Up to 6616 conditions per place. [2024-11-23 23:29:16,193 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 172 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-11-23 23:29:16,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 228 transitions, 2187 flow [2024-11-23 23:29:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-23 23:29:16,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-23 23:29:16,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 413 transitions. [2024-11-23 23:29:16,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4963942307692308 [2024-11-23 23:29:16,195 INFO L175 Difference]: Start difference. First operand has 144 places, 116 transitions, 971 flow. Second operand 13 states and 413 transitions. [2024-11-23 23:29:16,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 228 transitions, 2187 flow [2024-11-23 23:29:16,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 228 transitions, 2167 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:29:16,253 INFO L231 Difference]: Finished difference. Result has 156 places, 122 transitions, 1134 flow [2024-11-23 23:29:16,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1134, PETRI_PLACES=156, PETRI_TRANSITIONS=122} [2024-11-23 23:29:16,254 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 93 predicate places. [2024-11-23 23:29:16,254 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 122 transitions, 1134 flow [2024-11-23 23:29:16,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.444444444444443) internal successors, (422), 18 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:16,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:16,254 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] [2024-11-23 23:29:16,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-23 23:29:16,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:16,455 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:16,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:16,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1294720282, now seen corresponding path program 1 times [2024-11-23 23:29:16,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:16,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077737575] [2024-11-23 23:29:16,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:16,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:16,658 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:29:16,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:16,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077737575] [2024-11-23 23:29:16,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077737575] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:16,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606155731] [2024-11-23 23:29:16,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:16,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:16,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:16,661 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:16,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-23 23:29:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:16,803 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:29:16,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:29:16,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:16,923 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:29:16,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606155731] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:16,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:29:16,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-23 23:29:16,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638141607] [2024-11-23 23:29:16,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:16,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:16,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:16,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:16,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:29:16,946 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:29:16,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 122 transitions, 1134 flow. Second operand has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:16,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:16,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:29:16,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:18,788 INFO L124 PetriNetUnfolderBase]: 8873/13612 cut-off events. [2024-11-23 23:29:18,788 INFO L125 PetriNetUnfolderBase]: For 61617/62103 co-relation queries the response was YES. [2024-11-23 23:29:18,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59068 conditions, 13612 events. 8873/13612 cut-off events. For 61617/62103 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 82113 event pairs, 2712 based on Foata normal form. 365/13331 useless extension candidates. Maximal degree in co-relation 50183. Up to 7243 conditions per place. [2024-11-23 23:29:18,915 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 132 selfloop transitions, 13 changer transitions 0/155 dead transitions. [2024-11-23 23:29:18,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 155 transitions, 1679 flow [2024-11-23 23:29:18,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:29:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:29:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-11-23 23:29:18,916 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-11-23 23:29:18,916 INFO L175 Difference]: Start difference. First operand has 156 places, 122 transitions, 1134 flow. Second operand 5 states and 156 transitions. [2024-11-23 23:29:18,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 155 transitions, 1679 flow [2024-11-23 23:29:19,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 155 transitions, 1610 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-23 23:29:19,028 INFO L231 Difference]: Finished difference. Result has 153 places, 120 transitions, 1077 flow [2024-11-23 23:29:19,028 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1029, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1077, PETRI_PLACES=153, PETRI_TRANSITIONS=120} [2024-11-23 23:29:19,028 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 90 predicate places. [2024-11-23 23:29:19,028 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 120 transitions, 1077 flow [2024-11-23 23:29:19,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.6) internal successors, (133), 5 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:19,029 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:19,029 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, 1] [2024-11-23 23:29:19,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-23 23:29:19,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:19,229 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:19,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:19,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1007128237, now seen corresponding path program 2 times [2024-11-23 23:29:19,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:19,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901602267] [2024-11-23 23:29:19,230 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:19,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:19,257 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:19,257 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:29:19,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:19,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901602267] [2024-11-23 23:29:19,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901602267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:19,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976209660] [2024-11-23 23:29:19,426 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:19,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:19,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:19,428 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:19,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-23 23:29:19,557 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:19,557 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:19,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:29:19,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:19,644 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:29:19,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-23 23:29:19,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976209660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:19,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:19,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-23 23:29:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097263337] [2024-11-23 23:29:19,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:19,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:29:19,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:19,737 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:29:19,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:29:19,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-23 23:29:19,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 120 transitions, 1077 flow. Second operand has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:19,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:19,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-23 23:29:19,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:22,227 INFO L124 PetriNetUnfolderBase]: 12500/18298 cut-off events. [2024-11-23 23:29:22,228 INFO L125 PetriNetUnfolderBase]: For 105413/106602 co-relation queries the response was YES. [2024-11-23 23:29:22,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83710 conditions, 18298 events. 12500/18298 cut-off events. For 105413/106602 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 104100 event pairs, 1947 based on Foata normal form. 0/17812 useless extension candidates. Maximal degree in co-relation 71733. Up to 12035 conditions per place. [2024-11-23 23:29:22,577 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 254 selfloop transitions, 14 changer transitions 0/278 dead transitions. [2024-11-23 23:29:22,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 278 transitions, 3153 flow [2024-11-23 23:29:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:29:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:29:22,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-11-23 23:29:22,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49330357142857145 [2024-11-23 23:29:22,583 INFO L175 Difference]: Start difference. First operand has 153 places, 120 transitions, 1077 flow. Second operand 7 states and 221 transitions. [2024-11-23 23:29:22,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 278 transitions, 3153 flow [2024-11-23 23:29:23,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 278 transitions, 3115 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-23 23:29:23,014 INFO L231 Difference]: Finished difference. Result has 161 places, 131 transitions, 1177 flow [2024-11-23 23:29:23,015 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1177, PETRI_PLACES=161, PETRI_TRANSITIONS=131} [2024-11-23 23:29:23,015 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 98 predicate places. [2024-11-23 23:29:23,015 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 131 transitions, 1177 flow [2024-11-23 23:29:23,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 22.23076923076923) internal successors, (289), 13 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:23,016 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:23,016 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:23,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-11-23 23:29:23,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:23,217 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:23,217 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -136672988, now seen corresponding path program 3 times [2024-11-23 23:29:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:23,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779388486] [2024-11-23 23:29:23,218 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:29:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:23,261 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:29:23,262 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:29:23,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779388486] [2024-11-23 23:29:23,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779388486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570273587] [2024-11-23 23:29:23,761 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:29:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:23,763 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:23,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-23 23:29:23,882 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:29:23,882 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:23,883 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 23:29:23,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:23,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:29:24,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:29:24,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:29:24,054 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:29:24,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:29:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:29:24,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:24,669 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 80 treesize of output 76 [2024-11-23 23:29:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:29:24,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570273587] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:24,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:24,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2024-11-23 23:29:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060143759] [2024-11-23 23:29:24,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:24,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 23:29:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:24,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 23:29:24,979 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-11-23 23:29:26,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 64 [2024-11-23 23:29:26,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 131 transitions, 1177 flow. Second operand has 24 states, 24 states have (on average 19.625) internal successors, (471), 24 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:26,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:26,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 64 [2024-11-23 23:29:26,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:28,536 INFO L124 PetriNetUnfolderBase]: 8080/12502 cut-off events. [2024-11-23 23:29:28,536 INFO L125 PetriNetUnfolderBase]: For 69119/69643 co-relation queries the response was YES. [2024-11-23 23:29:28,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59705 conditions, 12502 events. 8080/12502 cut-off events. For 69119/69643 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 76877 event pairs, 1287 based on Foata normal form. 156/12356 useless extension candidates. Maximal degree in co-relation 51000. Up to 3468 conditions per place. [2024-11-23 23:29:28,636 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 236 selfloop transitions, 30 changer transitions 0/281 dead transitions. [2024-11-23 23:29:28,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 281 transitions, 3079 flow [2024-11-23 23:29:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:29:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:29:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-11-23 23:29:28,638 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4392361111111111 [2024-11-23 23:29:28,638 INFO L175 Difference]: Start difference. First operand has 161 places, 131 transitions, 1177 flow. Second operand 9 states and 253 transitions. [2024-11-23 23:29:28,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 281 transitions, 3079 flow [2024-11-23 23:29:28,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 281 transitions, 3062 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-23 23:29:28,770 INFO L231 Difference]: Finished difference. Result has 166 places, 131 transitions, 1222 flow [2024-11-23 23:29:28,771 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1222, PETRI_PLACES=166, PETRI_TRANSITIONS=131} [2024-11-23 23:29:28,771 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 103 predicate places. [2024-11-23 23:29:28,771 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 131 transitions, 1222 flow [2024-11-23 23:29:28,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 19.625) internal successors, (471), 24 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:28,771 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:28,771 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] [2024-11-23 23:29:28,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-23 23:29:28,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-23 23:29:28,972 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:28,973 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash 32762911, now seen corresponding path program 1 times [2024-11-23 23:29:28,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:28,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557614551] [2024-11-23 23:29:28,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:28,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:29:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557614551] [2024-11-23 23:29:29,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557614551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:29,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335980141] [2024-11-23 23:29:29,067 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:29,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:29,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:29,069 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:29,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-23 23:29:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:29,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:29:29,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:29,272 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 23:29:29,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 23:29:29,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335980141] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:29,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:29:29,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-23 23:29:29,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561197409] [2024-11-23 23:29:29,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:29,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:29,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:29,330 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:29,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:29:29,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:29:29,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 131 transitions, 1222 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:29,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:29,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:29:29,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:31,448 INFO L124 PetriNetUnfolderBase]: 7173/11825 cut-off events. [2024-11-23 23:29:31,448 INFO L125 PetriNetUnfolderBase]: For 66128/66650 co-relation queries the response was YES. [2024-11-23 23:29:31,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55740 conditions, 11825 events. 7173/11825 cut-off events. For 66128/66650 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 74856 event pairs, 2270 based on Foata normal form. 578/12292 useless extension candidates. Maximal degree in co-relation 47696. Up to 6120 conditions per place. [2024-11-23 23:29:31,679 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 144 selfloop transitions, 9 changer transitions 0/171 dead transitions. [2024-11-23 23:29:31,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 171 transitions, 1965 flow [2024-11-23 23:29:31,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:29:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:29:31,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-23 23:29:31,681 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.484375 [2024-11-23 23:29:31,681 INFO L175 Difference]: Start difference. First operand has 166 places, 131 transitions, 1222 flow. Second operand 5 states and 155 transitions. [2024-11-23 23:29:31,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 171 transitions, 1965 flow [2024-11-23 23:29:31,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 171 transitions, 1871 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-23 23:29:31,930 INFO L231 Difference]: Finished difference. Result has 166 places, 131 transitions, 1196 flow [2024-11-23 23:29:31,930 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1196, PETRI_PLACES=166, PETRI_TRANSITIONS=131} [2024-11-23 23:29:31,931 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 103 predicate places. [2024-11-23 23:29:31,931 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 131 transitions, 1196 flow [2024-11-23 23:29:31,931 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:31,931 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:31,931 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:31,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-23 23:29:32,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-23 23:29:32,135 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:32,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash -329319334, now seen corresponding path program 3 times [2024-11-23 23:29:32,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:32,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628382411] [2024-11-23 23:29:32,137 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:29:32,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:32,171 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:29:32,171 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-23 23:29:32,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:32,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628382411] [2024-11-23 23:29:32,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628382411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:32,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584154857] [2024-11-23 23:29:32,921 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 23:29:32,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:32,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:32,924 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:32,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-23 23:29:33,058 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 23:29:33,058 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:33,060 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-23 23:29:33,062 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:33,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:29:33,102 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 [2024-11-23 23:29:33,226 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:29:33,226 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 18 treesize of output 17 [2024-11-23 23:29:33,242 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:29:33,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:29:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:29:33,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:34,240 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 29 treesize of output 27 [2024-11-23 23:29:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-11-23 23:29:34,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584154857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:34,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:34,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 23 [2024-11-23 23:29:34,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902433487] [2024-11-23 23:29:34,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:34,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-23 23:29:34,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:34,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-23 23:29:34,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-11-23 23:29:35,872 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-23 23:29:35,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 131 transitions, 1196 flow. Second operand has 24 states, 24 states have (on average 20.75) internal successors, (498), 24 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:35,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:35,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-23 23:29:35,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:38,462 INFO L124 PetriNetUnfolderBase]: 6435/9916 cut-off events. [2024-11-23 23:29:38,462 INFO L125 PetriNetUnfolderBase]: For 54440/54936 co-relation queries the response was YES. [2024-11-23 23:29:38,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48054 conditions, 9916 events. 6435/9916 cut-off events. For 54440/54936 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 57742 event pairs, 665 based on Foata normal form. 156/9999 useless extension candidates. Maximal degree in co-relation 41242. Up to 2868 conditions per place. [2024-11-23 23:29:38,640 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 209 selfloop transitions, 27 changer transitions 0/252 dead transitions. [2024-11-23 23:29:38,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 252 transitions, 2700 flow [2024-11-23 23:29:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:29:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:29:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-11-23 23:29:38,642 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-11-23 23:29:38,642 INFO L175 Difference]: Start difference. First operand has 166 places, 131 transitions, 1196 flow. Second operand 9 states and 248 transitions. [2024-11-23 23:29:38,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 252 transitions, 2700 flow [2024-11-23 23:29:38,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 252 transitions, 2606 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-23 23:29:38,874 INFO L231 Difference]: Finished difference. Result has 168 places, 130 transitions, 1214 flow [2024-11-23 23:29:38,875 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1214, PETRI_PLACES=168, PETRI_TRANSITIONS=130} [2024-11-23 23:29:38,875 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 105 predicate places. [2024-11-23 23:29:38,875 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 130 transitions, 1214 flow [2024-11-23 23:29:38,876 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 20.75) internal successors, (498), 24 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:38,876 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:38,876 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, 1, 1, 1, 1] [2024-11-23 23:29:38,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-23 23:29:39,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-23 23:29:39,076 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:39,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:39,077 INFO L85 PathProgramCache]: Analyzing trace with hash 27471050, now seen corresponding path program 1 times [2024-11-23 23:29:39,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:39,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302200897] [2024-11-23 23:29:39,077 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:39,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-23 23:29:39,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:39,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302200897] [2024-11-23 23:29:39,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302200897] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:39,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548277648] [2024-11-23 23:29:39,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:39,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:39,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:39,578 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:39,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-23 23:29:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:39,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-23 23:29:39,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:29:40,091 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:40,318 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 [2024-11-23 23:29:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-23 23:29:40,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548277648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:29:40,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:29:40,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-23 23:29:40,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348803812] [2024-11-23 23:29:40,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:29:40,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-23 23:29:40,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:40,388 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-23 23:29:40,388 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-23 23:29:41,450 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:29:41,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 130 transitions, 1214 flow. Second operand has 22 states, 22 states have (on average 24.181818181818183) internal successors, (532), 22 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:41,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:41,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:29:41,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:45,380 INFO L124 PetriNetUnfolderBase]: 8865/14394 cut-off events. [2024-11-23 23:29:45,380 INFO L125 PetriNetUnfolderBase]: For 86623/87317 co-relation queries the response was YES. [2024-11-23 23:29:45,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68579 conditions, 14394 events. 8865/14394 cut-off events. For 86623/87317 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 92052 event pairs, 3117 based on Foata normal form. 358/14560 useless extension candidates. Maximal degree in co-relation 58968. Up to 4655 conditions per place. [2024-11-23 23:29:45,542 INFO L140 encePairwiseOnDemand]: 51/64 looper letters, 201 selfloop transitions, 34 changer transitions 0/253 dead transitions. [2024-11-23 23:29:45,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 253 transitions, 2770 flow [2024-11-23 23:29:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-23 23:29:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-23 23:29:45,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 418 transitions. [2024-11-23 23:29:45,544 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46651785714285715 [2024-11-23 23:29:45,545 INFO L175 Difference]: Start difference. First operand has 168 places, 130 transitions, 1214 flow. Second operand 14 states and 418 transitions. [2024-11-23 23:29:45,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 253 transitions, 2770 flow [2024-11-23 23:29:45,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 253 transitions, 2588 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-23 23:29:45,767 INFO L231 Difference]: Finished difference. Result has 176 places, 135 transitions, 1265 flow [2024-11-23 23:29:45,767 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1265, PETRI_PLACES=176, PETRI_TRANSITIONS=135} [2024-11-23 23:29:45,767 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 113 predicate places. [2024-11-23 23:29:45,768 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 135 transitions, 1265 flow [2024-11-23 23:29:45,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 24.181818181818183) internal successors, (532), 22 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:45,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:45,768 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] [2024-11-23 23:29:45,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-23 23:29:45,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:45,969 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:45,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:45,969 INFO L85 PathProgramCache]: Analyzing trace with hash -507242596, now seen corresponding path program 1 times [2024-11-23 23:29:45,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:45,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851680426] [2024-11-23 23:29:45,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:45,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:46,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-23 23:29:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851680426] [2024-11-23 23:29:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851680426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090563072] [2024-11-23 23:29:46,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:46,110 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:46,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-23 23:29:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:46,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-23 23:29:46,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:46,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:29:46,325 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:29:46,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090563072] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:46,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:29:46,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-23 23:29:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639353889] [2024-11-23 23:29:46,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:46,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:29:46,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:46,391 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:29:46,391 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-23 23:29:46,430 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 64 [2024-11-23 23:29:46,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 135 transitions, 1265 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:46,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:46,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 64 [2024-11-23 23:29:46,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:48,826 INFO L124 PetriNetUnfolderBase]: 7859/12817 cut-off events. [2024-11-23 23:29:48,827 INFO L125 PetriNetUnfolderBase]: For 76194/76762 co-relation queries the response was YES. [2024-11-23 23:29:48,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60342 conditions, 12817 events. 7859/12817 cut-off events. For 76194/76762 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 82381 event pairs, 2186 based on Foata normal form. 332/12730 useless extension candidates. Maximal degree in co-relation 50501. Up to 6096 conditions per place. [2024-11-23 23:29:48,947 INFO L140 encePairwiseOnDemand]: 58/64 looper letters, 147 selfloop transitions, 13 changer transitions 0/176 dead transitions. [2024-11-23 23:29:48,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 176 transitions, 1991 flow [2024-11-23 23:29:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:29:48,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:29:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 156 transitions. [2024-11-23 23:29:48,949 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4875 [2024-11-23 23:29:48,949 INFO L175 Difference]: Start difference. First operand has 176 places, 135 transitions, 1265 flow. Second operand 5 states and 156 transitions. [2024-11-23 23:29:48,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 176 transitions, 1991 flow [2024-11-23 23:29:49,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 176 transitions, 1887 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-11-23 23:29:49,082 INFO L231 Difference]: Finished difference. Result has 169 places, 132 transitions, 1187 flow [2024-11-23 23:29:49,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1187, PETRI_PLACES=169, PETRI_TRANSITIONS=132} [2024-11-23 23:29:49,082 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 106 predicate places. [2024-11-23 23:29:49,082 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 132 transitions, 1187 flow [2024-11-23 23:29:49,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:49,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:49,083 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:49,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-23 23:29:49,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-23 23:29:49,283 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:49,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:49,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1125287590, now seen corresponding path program 1 times [2024-11-23 23:29:49,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:49,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890394074] [2024-11-23 23:29:49,284 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:29:49,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:29:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:29:51,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:51,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890394074] [2024-11-23 23:29:51,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890394074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:29:51,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:29:51,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-11-23 23:29:51,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663380110] [2024-11-23 23:29:51,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:29:51,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-23 23:29:51,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:29:51,057 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-23 23:29:51,057 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-23 23:29:51,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 64 [2024-11-23 23:29:51,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 132 transitions, 1187 flow. Second operand has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:51,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:29:51,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 64 [2024-11-23 23:29:51,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:29:54,749 INFO L124 PetriNetUnfolderBase]: 6855/12867 cut-off events. [2024-11-23 23:29:54,749 INFO L125 PetriNetUnfolderBase]: For 66218/67039 co-relation queries the response was YES. [2024-11-23 23:29:54,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54867 conditions, 12867 events. 6855/12867 cut-off events. For 66218/67039 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 94630 event pairs, 1452 based on Foata normal form. 7/12777 useless extension candidates. Maximal degree in co-relation 46845. Up to 7716 conditions per place. [2024-11-23 23:29:54,872 INFO L140 encePairwiseOnDemand]: 50/64 looper letters, 179 selfloop transitions, 82 changer transitions 12/293 dead transitions. [2024-11-23 23:29:54,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 293 transitions, 3210 flow [2024-11-23 23:29:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 23:29:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-23 23:29:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 399 transitions. [2024-11-23 23:29:54,874 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3896484375 [2024-11-23 23:29:54,874 INFO L175 Difference]: Start difference. First operand has 169 places, 132 transitions, 1187 flow. Second operand 16 states and 399 transitions. [2024-11-23 23:29:54,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 293 transitions, 3210 flow [2024-11-23 23:29:54,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 293 transitions, 3142 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:29:54,985 INFO L231 Difference]: Finished difference. Result has 187 places, 201 transitions, 2151 flow [2024-11-23 23:29:54,985 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2151, PETRI_PLACES=187, PETRI_TRANSITIONS=201} [2024-11-23 23:29:54,986 INFO L279 CegarLoopForPetriNet]: 63 programPoint places, 124 predicate places. [2024-11-23 23:29:54,986 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 201 transitions, 2151 flow [2024-11-23 23:29:54,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:29:54,986 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:29:54,986 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:29:54,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-11-23 23:29:54,986 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-23 23:29:54,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:29:54,987 INFO L85 PathProgramCache]: Analyzing trace with hash 893184780, now seen corresponding path program 2 times [2024-11-23 23:29:54,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:29:54,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119388020] [2024-11-23 23:29:54,987 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:54,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:29:55,035 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:55,035 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:29:56,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:29:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119388020] [2024-11-23 23:29:56,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119388020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:29:56,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065674732] [2024-11-23 23:29:56,936 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:29:56,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:29:56,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:29:56,938 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:29:56,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77d47507-7b6a-4cd6-b89d-df62d28ed487/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-23 23:29:57,098 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:29:57,098 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:29:57,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-11-23 23:29:57,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:29:57,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:29:57,189 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-23 23:29:57,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-23 23:29:57,319 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-23 23:29:57,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-23 23:29:57,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 24 [2024-11-23 23:29:58,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2024-11-23 23:29:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-23 23:29:58,510 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:29:58,873 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:29:58,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 356 treesize of output 336 [2024-11-23 23:29:59,088 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 75 treesize of output 73 [2024-11-23 23:29:59,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:29:59,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 198 treesize of output 222 [2024-11-23 23:32:44,406 WARN L286 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:34:09,041 WARN L286 SmtUtils]: Spent 8.20s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:34:21,066 WARN L286 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:34:37,492 WARN L286 SmtUtils]: Spent 12.19s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:34:55,017 WARN L286 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:36:34,545 WARN L286 SmtUtils]: Spent 6.45s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:37:11,636 WARN L286 SmtUtils]: Spent 12.06s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:18,779 WARN L286 SmtUtils]: Spent 12.06s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:38:35,221 WARN L286 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-23 23:39:58,968 WARN L286 SmtUtils]: Spent 12.09s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)