./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd --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 5daf9d459a591738ce4ac52eada4b738511fbb9d800cd03182e33bae5ebd943b --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-13 15:08:56,827 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-13 15:08:56,935 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-13 15:08:56,948 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-13 15:08:56,948 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-13 15:08:56,994 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-13 15:08:56,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-13 15:08:56,997 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-13 15:08:56,998 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-13 15:08:56,999 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-13 15:08:57,000 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-13 15:08:57,000 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-13 15:08:57,001 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-13 15:08:57,001 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-13 15:08:57,001 INFO L153 SettingsManager]: * Use SBE=true [2024-11-13 15:08:57,002 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-13 15:08:57,002 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-13 15:08:57,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-13 15:08:57,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-13 15:08:57,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-13 15:08:57,003 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-13 15:08:57,003 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-13 15:08:57,003 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-13 15:08:57,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-13 15:08:57,004 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-13 15:08:57,004 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-13 15:08:57,004 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-13 15:08:57,004 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-13 15:08:57,004 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-13 15:08:57,004 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-13 15:08:57,005 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-13 15:08:57,005 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-13 15:08:57,005 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-13 15:08:57,005 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:08:57,005 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-13 15:08:57,005 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-13 15:08:57,006 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-13 15:08:57,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-13 15:08:57,007 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-13 15:08:57,007 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-13 15:08:57,007 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-13 15:08:57,007 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-13 15:08:57,007 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_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd 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 -> 5daf9d459a591738ce4ac52eada4b738511fbb9d800cd03182e33bae5ebd943b [2024-11-13 15:08:57,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-13 15:08:57,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-13 15:08:57,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-13 15:08:57,435 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-13 15:08:57,437 INFO L274 PluginConnector]: CDTParser initialized [2024-11-13 15:08:57,441 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c Unable to find full path for "g++" [2024-11-13 15:08:59,828 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-13 15:09:00,175 INFO L384 CDTParser]: Found 1 translation units. [2024-11-13 15:09:00,179 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr-oob.c [2024-11-13 15:09:00,203 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/data/b9763a0ac/7da00e65709347bc9429653fd677b3cb/FLAG895283315 [2024-11-13 15:09:00,428 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/data/b9763a0ac/7da00e65709347bc9429653fd677b3cb [2024-11-13 15:09:00,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-13 15:09:00,433 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-13 15:09:00,436 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-13 15:09:00,437 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-13 15:09:00,444 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-13 15:09:00,445 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:00,447 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f643582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00, skipping insertion in model container [2024-11-13 15:09:00,447 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:00,482 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-13 15:09:00,805 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 15:09:00,832 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 15:09:00,838 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-13 15:09:00,845 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:09:00,868 INFO L200 MainTranslator]: Completed pre-run [2024-11-13 15:09:00,950 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-13 15:09:00,987 INFO L204 MainTranslator]: Completed translation [2024-11-13 15:09:00,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00 WrapperNode [2024-11-13 15:09:00,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-13 15:09:00,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-13 15:09:00,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-13 15:09:00,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-13 15:09:00,997 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,010 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,055 INFO L138 Inliner]: procedures = 27, calls = 66, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 390 [2024-11-13 15:09:01,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-13 15:09:01,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-13 15:09:01,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-13 15:09:01,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-13 15:09:01,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,069 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,076 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,102 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 16, 3, 3]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 4, 1, 1]. [2024-11-13 15:09:01,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,103 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,142 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,162 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,168 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-13 15:09:01,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-13 15:09:01,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-13 15:09:01,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-13 15:09:01,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (1/1) ... [2024-11-13 15:09:01,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-13 15:09:01,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:01,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-13 15:09:01,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-13 15:09:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-13 15:09:01,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-13 15:09:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-13 15:09:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-13 15:09:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-13 15:09:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-13 15:09:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-13 15:09:01,266 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-13 15:09:01,267 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-13 15:09:01,268 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-13 15:09:01,268 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-13 15:09:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-13 15:09:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-13 15:09:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-13 15:09:01,269 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-13 15:09:01,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-13 15:09:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-13 15:09:01,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-13 15:09:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-13 15:09:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-13 15:09:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-13 15:09:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-13 15:09:01,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-13 15:09:01,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-13 15:09:01,273 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-13 15:09:01,497 INFO L238 CfgBuilder]: Building ICFG [2024-11-13 15:09:01,500 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-13 15:09:02,857 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-13 15:09:02,858 INFO L287 CfgBuilder]: Performing block encoding [2024-11-13 15:09:03,890 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-13 15:09:03,890 INFO L316 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-13 15:09:03,891 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:09:03 BoogieIcfgContainer [2024-11-13 15:09:03,891 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-13 15:09:03,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-13 15:09:03,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-13 15:09:03,906 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-13 15:09:03,908 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 03:09:00" (1/3) ... [2024-11-13 15:09:03,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626596f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:09:03, skipping insertion in model container [2024-11-13 15:09:03,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 03:09:00" (2/3) ... [2024-11-13 15:09:03,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@626596f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 03:09:03, skipping insertion in model container [2024-11-13 15:09:03,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 03:09:03" (3/3) ... [2024-11-13 15:09:03,911 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr-oob.c [2024-11-13 15:09:03,933 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-13 15:09:03,936 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-prod-cons-eq.wvr-oob.c that has 4 procedures, 97 locations, 1 initial locations, 9 loop locations, and 46 error locations. [2024-11-13 15:09:03,936 INFO L492 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-13 15:09:04,131 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-13 15:09:04,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 106 transitions, 233 flow [2024-11-13 15:09:04,267 INFO L124 PetriNetUnfolderBase]: 10/103 cut-off events. [2024-11-13 15:09:04,271 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-13 15:09:04,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 10/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 308 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2024-11-13 15:09:04,278 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 106 transitions, 233 flow [2024-11-13 15:09:04,291 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 102 transitions, 222 flow [2024-11-13 15:09:04,308 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-13 15:09:04,326 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;@660aa3b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-13 15:09:04,326 INFO L334 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2024-11-13 15:09:04,336 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-13 15:09:04,336 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-13 15:09:04,336 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-13 15:09:04,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:04,337 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:09:04,338 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:04,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1282600, now seen corresponding path program 1 times [2024-11-13 15:09:04,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:04,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428155896] [2024-11-13 15:09:04,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:04,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:04,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:04,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:04,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428155896] [2024-11-13 15:09:04,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428155896] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:04,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 15:09:04,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700084299] [2024-11-13 15:09:04,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:04,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:09:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:04,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:09:04,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:09:04,975 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:04,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:04,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:04,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:04,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:08,031 INFO L124 PetriNetUnfolderBase]: 5713/11550 cut-off events. [2024-11-13 15:09:08,031 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-13 15:09:08,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19585 conditions, 11550 events. 5713/11550 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 114696 event pairs, 4115 based on Foata normal form. 1/6135 useless extension candidates. Maximal degree in co-relation 18897. Up to 7695 conditions per place. [2024-11-13 15:09:08,147 INFO L140 encePairwiseOnDemand]: 93/106 looper letters, 52 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2024-11-13 15:09:08,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 314 flow [2024-11-13 15:09:08,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:09:08,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:09:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-13 15:09:08,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-11-13 15:09:08,167 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 222 flow. Second operand 3 states and 185 transitions. [2024-11-13 15:09:08,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 314 flow [2024-11-13 15:09:08,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-13 15:09:08,197 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 198 flow [2024-11-13 15:09:08,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-11-13 15:09:08,205 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -14 predicate places. [2024-11-13 15:09:08,205 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 198 flow [2024-11-13 15:09:08,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:08,206 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:08,206 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-13 15:09:08,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-13 15:09:08,206 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:08,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1282601, now seen corresponding path program 1 times [2024-11-13 15:09:08,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:08,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827295113] [2024-11-13 15:09:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:08,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:08,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:08,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827295113] [2024-11-13 15:09:08,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827295113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:08,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:08,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:09:08,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793099243] [2024-11-13 15:09:08,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:08,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:09:08,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:08,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:09:08,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:09:09,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:09,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:09,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:09,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:09,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:11,674 INFO L124 PetriNetUnfolderBase]: 5714/11553 cut-off events. [2024-11-13 15:09:11,675 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-13 15:09:11,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19394 conditions, 11553 events. 5714/11553 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 114807 event pairs, 4115 based on Foata normal form. 0/6135 useless extension candidates. Maximal degree in co-relation 19341. Up to 7712 conditions per place. [2024-11-13 15:09:11,763 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 59 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-13 15:09:11,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 330 flow [2024-11-13 15:09:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:09:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:09:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2024-11-13 15:09:11,767 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-13 15:09:11,768 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 198 flow. Second operand 4 states and 224 transitions. [2024-11-13 15:09:11,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 330 flow [2024-11-13 15:09:11,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:09:11,772 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 217 flow [2024-11-13 15:09:11,772 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-13 15:09:11,773 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -11 predicate places. [2024-11-13 15:09:11,773 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 217 flow [2024-11-13 15:09:11,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:11,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:11,774 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-13 15:09:11,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-13 15:09:11,775 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:11,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:11,776 INFO L85 PathProgramCache]: Analyzing trace with hash 39762049, now seen corresponding path program 1 times [2024-11-13 15:09:11,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:11,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543649766] [2024-11-13 15:09:11,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:11,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:12,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:12,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543649766] [2024-11-13 15:09:12,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543649766] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:12,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:12,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:09:12,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212179310] [2024-11-13 15:09:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:12,276 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:09:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:12,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:09:12,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:09:12,504 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:12,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:12,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:12,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:12,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:14,547 INFO L124 PetriNetUnfolderBase]: 5715/11556 cut-off events. [2024-11-13 15:09:14,548 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-13 15:09:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 11556 events. 5715/11556 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114793 event pairs, 4115 based on Foata normal form. 0/6135 useless extension candidates. Maximal degree in co-relation 19384. Up to 7711 conditions per place. [2024-11-13 15:09:14,637 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 59 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2024-11-13 15:09:14,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 355 flow [2024-11-13 15:09:14,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:09:14,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:09:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-13 15:09:14,640 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-11-13 15:09:14,641 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 217 flow. Second operand 5 states and 267 transitions. [2024-11-13 15:09:14,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 355 flow [2024-11-13 15:09:14,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:09:14,648 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 251 flow [2024-11-13 15:09:14,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-11-13 15:09:14,649 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -6 predicate places. [2024-11-13 15:09:14,650 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 251 flow [2024-11-13 15:09:14,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:14,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:14,650 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-13 15:09:14,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-13 15:09:14,651 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:14,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:14,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1232623433, now seen corresponding path program 1 times [2024-11-13 15:09:14,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:14,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212284421] [2024-11-13 15:09:14,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:14,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:15,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212284421] [2024-11-13 15:09:15,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212284421] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:15,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185805261] [2024-11-13 15:09:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:15,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:15,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:15,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:15,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-13 15:09:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:15,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:09:15,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:15,478 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 [2024-11-13 15:09:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:15,893 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:16,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185805261] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:16,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:16,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-13 15:09:16,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104850108] [2024-11-13 15:09:16,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:16,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-13 15:09:16,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-13 15:09:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-13 15:09:16,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:16,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 251 flow. Second operand has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:16,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:16,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:16,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:19,145 INFO L124 PetriNetUnfolderBase]: 5715/11555 cut-off events. [2024-11-13 15:09:19,145 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-13 15:09:19,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19422 conditions, 11555 events. 5715/11555 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114757 event pairs, 4115 based on Foata normal form. 0/6137 useless extension candidates. Maximal degree in co-relation 19394. Up to 7711 conditions per place. [2024-11-13 15:09:19,224 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 58 selfloop transitions, 7 changer transitions 0/97 dead transitions. [2024-11-13 15:09:19,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 377 flow [2024-11-13 15:09:19,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:09:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:09:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 303 transitions. [2024-11-13 15:09:19,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-11-13 15:09:19,227 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 251 flow. Second operand 6 states and 303 transitions. [2024-11-13 15:09:19,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 377 flow [2024-11-13 15:09:19,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 97 transitions, 376 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:09:19,231 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 260 flow [2024-11-13 15:09:19,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2024-11-13 15:09:19,233 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2024-11-13 15:09:19,234 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 260 flow [2024-11-13 15:09:19,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:19,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:19,235 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-13 15:09:19,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-13 15:09:19,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:19,439 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:19,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:19,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1232626126, now seen corresponding path program 1 times [2024-11-13 15:09:19,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:19,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800620741] [2024-11-13 15:09:19,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:19,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:19,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:19,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:19,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800620741] [2024-11-13 15:09:19,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800620741] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:19,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:19,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:09:19,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572474333] [2024-11-13 15:09:19,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:19,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:09:19,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:09:19,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:09:20,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:20,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:20,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:20,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:20,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:21,691 INFO L124 PetriNetUnfolderBase]: 5716/11558 cut-off events. [2024-11-13 15:09:21,691 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-13 15:09:21,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19435 conditions, 11558 events. 5716/11558 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114833 event pairs, 4115 based on Foata normal form. 0/6139 useless extension candidates. Maximal degree in co-relation 19402. Up to 7713 conditions per place. [2024-11-13 15:09:21,762 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 59 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-11-13 15:09:21,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 402 flow [2024-11-13 15:09:21,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:09:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:09:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 266 transitions. [2024-11-13 15:09:21,765 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-11-13 15:09:21,765 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 260 flow. Second operand 5 states and 266 transitions. [2024-11-13 15:09:21,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 402 flow [2024-11-13 15:09:21,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 368 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-13 15:09:21,769 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 269 flow [2024-11-13 15:09:21,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=269, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2024-11-13 15:09:21,770 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2024-11-13 15:09:21,770 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 269 flow [2024-11-13 15:09:21,772 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:21,772 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:21,772 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-13 15:09:21,772 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-13 15:09:21,772 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:21,773 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:21,773 INFO L85 PathProgramCache]: Analyzing trace with hash -443334578, now seen corresponding path program 1 times [2024-11-13 15:09:21,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:21,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973366649] [2024-11-13 15:09:21,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:21,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:22,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973366649] [2024-11-13 15:09:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973366649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977615992] [2024-11-13 15:09:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:22,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:22,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:22,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:22,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-13 15:09:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:22,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-13 15:09:22,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:22,364 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 [2024-11-13 15:09:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:22,714 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:23,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977615992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:23,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:23,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 15:09:23,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425484600] [2024-11-13 15:09:23,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:23,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:09:23,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:23,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:09:23,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:09:24,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:24,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 269 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:24,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:24,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:24,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:25,741 INFO L124 PetriNetUnfolderBase]: 5716/11557 cut-off events. [2024-11-13 15:09:25,742 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-13 15:09:25,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19433 conditions, 11557 events. 5716/11557 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 879. Compared 114894 event pairs, 4115 based on Foata normal form. 0/6141 useless extension candidates. Maximal degree in co-relation 19391. Up to 7706 conditions per place. [2024-11-13 15:09:25,919 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 55 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-11-13 15:09:25,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 399 flow [2024-11-13 15:09:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:09:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:09:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2024-11-13 15:09:25,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46495956873315364 [2024-11-13 15:09:25,922 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 269 flow. Second operand 7 states and 345 transitions. [2024-11-13 15:09:25,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 399 flow [2024-11-13 15:09:25,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:09:25,926 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 282 flow [2024-11-13 15:09:25,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=282, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-11-13 15:09:25,928 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2024-11-13 15:09:25,928 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 282 flow [2024-11-13 15:09:25,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:25,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:25,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-13 15:09:25,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-13 15:09:26,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:26,130 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:26,131 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:26,131 INFO L85 PathProgramCache]: Analyzing trace with hash -443293989, now seen corresponding path program 1 times [2024-11-13 15:09:26,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:26,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893219443] [2024-11-13 15:09:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:26,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:26,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:26,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893219443] [2024-11-13 15:09:26,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893219443] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:26,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:26,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-13 15:09:26,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570343886] [2024-11-13 15:09:26,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:26,330 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:09:26,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:26,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:09:26,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:09:26,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 15:09:26,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:26,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:26,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 15:09:26,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:27,959 INFO L124 PetriNetUnfolderBase]: 7474/15889 cut-off events. [2024-11-13 15:09:27,960 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-13 15:09:27,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26445 conditions, 15889 events. 7474/15889 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 169782 event pairs, 5726 based on Foata normal form. 236/8636 useless extension candidates. Maximal degree in co-relation 26380. Up to 7712 conditions per place. [2024-11-13 15:09:28,037 INFO L140 encePairwiseOnDemand]: 94/106 looper letters, 99 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-11-13 15:09:28,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 612 flow [2024-11-13 15:09:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:09:28,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:09:28,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 371 transitions. [2024-11-13 15:09:28,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-13 15:09:28,040 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 282 flow. Second operand 6 states and 371 transitions. [2024-11-13 15:09:28,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 612 flow [2024-11-13 15:09:28,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 144 transitions, 587 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-13 15:09:28,045 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 334 flow [2024-11-13 15:09:28,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2024-11-13 15:09:28,046 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 1 predicate places. [2024-11-13 15:09:28,047 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 334 flow [2024-11-13 15:09:28,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:28,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:28,047 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-13 15:09:28,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-13 15:09:28,048 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:28,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash -857222928, now seen corresponding path program 1 times [2024-11-13 15:09:28,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:28,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060863423] [2024-11-13 15:09:28,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:28,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:28,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060863423] [2024-11-13 15:09:28,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060863423] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48114540] [2024-11-13 15:09:28,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:28,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:28,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:28,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:28,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-13 15:09:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:28,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:09:28,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:28,673 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 [2024-11-13 15:09:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:28,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:29,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:29,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48114540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:29,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:29,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 15:09:29,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035091459] [2024-11-13 15:09:29,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:29,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:09:29,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:29,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:09:29,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:09:30,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:30,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 106 transitions, 334 flow. Second operand has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:30,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:30,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:30,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:32,604 INFO L124 PetriNetUnfolderBase]: 7774/15401 cut-off events. [2024-11-13 15:09:32,605 INFO L125 PetriNetUnfolderBase]: For 438/438 co-relation queries the response was YES. [2024-11-13 15:09:32,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 15401 events. 7774/15401 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 1212. Compared 156553 event pairs, 5906 based on Foata normal form. 0/8135 useless extension candidates. Maximal degree in co-relation 26660. Up to 10679 conditions per place. [2024-11-13 15:09:32,699 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 55 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-11-13 15:09:32,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 112 transitions, 526 flow [2024-11-13 15:09:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-13 15:09:32,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-13 15:09:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 431 transitions. [2024-11-13 15:09:32,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45178197064989517 [2024-11-13 15:09:32,703 INFO L175 Difference]: Start difference. First operand has 103 places, 106 transitions, 334 flow. Second operand 9 states and 431 transitions. [2024-11-13 15:09:32,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 112 transitions, 526 flow [2024-11-13 15:09:32,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 112 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:09:32,708 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 412 flow [2024-11-13 15:09:32,709 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-13 15:09:32,712 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-11-13 15:09:32,712 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 412 flow [2024-11-13 15:09:32,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:32,713 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:32,713 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:32,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-13 15:09:32,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:32,914 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:32,914 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash -803670141, now seen corresponding path program 1 times [2024-11-13 15:09:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:32,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430269992] [2024-11-13 15:09:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:33,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:33,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430269992] [2024-11-13 15:09:33,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430269992] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:33,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:33,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:09:33,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115116549] [2024-11-13 15:09:33,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:33,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:09:33,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:33,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:09:33,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:09:33,168 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 106 [2024-11-13 15:09:33,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:33,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:33,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 106 [2024-11-13 15:09:33,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:34,561 INFO L124 PetriNetUnfolderBase]: 7703/14868 cut-off events. [2024-11-13 15:09:34,561 INFO L125 PetriNetUnfolderBase]: For 427/427 co-relation queries the response was YES. [2024-11-13 15:09:34,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26139 conditions, 14868 events. 7703/14868 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 146419 event pairs, 5942 based on Foata normal form. 0/8319 useless extension candidates. Maximal degree in co-relation 26019. Up to 10596 conditions per place. [2024-11-13 15:09:34,652 INFO L140 encePairwiseOnDemand]: 102/106 looper letters, 77 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2024-11-13 15:09:34,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 564 flow [2024-11-13 15:09:34,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:09:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:09:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-13 15:09:34,654 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2024-11-13 15:09:34,654 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 412 flow. Second operand 3 states and 182 transitions. [2024-11-13 15:09:34,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 564 flow [2024-11-13 15:09:34,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 109 transitions, 510 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-13 15:09:34,660 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 356 flow [2024-11-13 15:09:34,661 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2024-11-13 15:09:34,662 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 0 predicate places. [2024-11-13 15:09:34,662 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 356 flow [2024-11-13 15:09:34,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:34,664 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:34,664 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:34,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-13 15:09:34,665 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:34,665 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:34,665 INFO L85 PathProgramCache]: Analyzing trace with hash -803670140, now seen corresponding path program 1 times [2024-11-13 15:09:34,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:34,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823855949] [2024-11-13 15:09:34,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:34,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:35,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:35,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823855949] [2024-11-13 15:09:35,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823855949] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:35,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:35,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:09:35,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581878122] [2024-11-13 15:09:35,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:35,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:09:35,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:35,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:09:35,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:09:35,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:35,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 356 flow. Second operand has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:35,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:35,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:35,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:36,980 INFO L124 PetriNetUnfolderBase]: 7708/14886 cut-off events. [2024-11-13 15:09:36,980 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2024-11-13 15:09:37,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26149 conditions, 14886 events. 7708/14886 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 146530 event pairs, 5942 based on Foata normal form. 0/8335 useless extension candidates. Maximal degree in co-relation 19217. Up to 10636 conditions per place. [2024-11-13 15:09:37,068 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 80 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-11-13 15:09:37,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 118 transitions, 570 flow [2024-11-13 15:09:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:09:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:09:37,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 304 transitions. [2024-11-13 15:09:37,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-11-13 15:09:37,070 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 356 flow. Second operand 6 states and 304 transitions. [2024-11-13 15:09:37,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 118 transitions, 570 flow [2024-11-13 15:09:37,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 118 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:09:37,074 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 422 flow [2024-11-13 15:09:37,074 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=422, PETRI_PLACES=109, PETRI_TRANSITIONS=115} [2024-11-13 15:09:37,075 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-11-13 15:09:37,075 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 422 flow [2024-11-13 15:09:37,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:37,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:37,076 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:37,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-13 15:09:37,076 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:37,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -803670238, now seen corresponding path program 1 times [2024-11-13 15:09:37,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:37,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464295990] [2024-11-13 15:09:37,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:37,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:37,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:37,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464295990] [2024-11-13 15:09:37,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464295990] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:37,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:37,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:09:37,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223041426] [2024-11-13 15:09:37,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:37,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-13 15:09:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-13 15:09:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-13 15:09:37,461 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:37,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:37,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:37,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:37,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:38,555 INFO L124 PetriNetUnfolderBase]: 6892/13462 cut-off events. [2024-11-13 15:09:38,555 INFO L125 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2024-11-13 15:09:38,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23619 conditions, 13462 events. 6892/13462 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 1056. Compared 132281 event pairs, 5220 based on Foata normal form. 4/7340 useless extension candidates. Maximal degree in co-relation 23514. Up to 9507 conditions per place. [2024-11-13 15:09:38,624 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 74 selfloop transitions, 15 changer transitions 0/119 dead transitions. [2024-11-13 15:09:38,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 119 transitions, 620 flow [2024-11-13 15:09:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:09:38,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:09:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-11-13 15:09:38,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962264150943396 [2024-11-13 15:09:38,626 INFO L175 Difference]: Start difference. First operand has 109 places, 115 transitions, 422 flow. Second operand 5 states and 263 transitions. [2024-11-13 15:09:38,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 119 transitions, 620 flow [2024-11-13 15:09:38,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 119 transitions, 614 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:09:38,631 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 493 flow [2024-11-13 15:09:38,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=493, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2024-11-13 15:09:38,633 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 11 predicate places. [2024-11-13 15:09:38,633 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 493 flow [2024-11-13 15:09:38,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:38,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:38,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:38,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-13 15:09:38,634 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:38,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:38,634 INFO L85 PathProgramCache]: Analyzing trace with hash -842684568, now seen corresponding path program 1 times [2024-11-13 15:09:38,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:38,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483434671] [2024-11-13 15:09:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:38,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:38,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:38,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483434671] [2024-11-13 15:09:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483434671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719638838] [2024-11-13 15:09:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:38,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:38,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:38,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:38,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-13 15:09:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:39,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-13 15:09:39,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:39,094 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 [2024-11-13 15:09:39,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:39,113 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:39,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719638838] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:39,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-13 15:09:39,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 14 [2024-11-13 15:09:39,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235293531] [2024-11-13 15:09:39,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:39,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:09:39,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:39,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:09:39,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-11-13 15:09:39,317 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-13 15:09:39,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 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) [2024-11-13 15:09:39,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:39,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-13 15:09:39,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:40,639 INFO L124 PetriNetUnfolderBase]: 6630/13843 cut-off events. [2024-11-13 15:09:40,639 INFO L125 PetriNetUnfolderBase]: For 432/432 co-relation queries the response was YES. [2024-11-13 15:09:40,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23717 conditions, 13843 events. 6630/13843 cut-off events. For 432/432 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 142743 event pairs, 5061 based on Foata normal form. 0/7588 useless extension candidates. Maximal degree in co-relation 23586. Up to 6852 conditions per place. [2024-11-13 15:09:40,735 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 123 selfloop transitions, 11 changer transitions 0/164 dead transitions. [2024-11-13 15:09:40,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 164 transitions, 906 flow [2024-11-13 15:09:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-13 15:09:40,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-13 15:09:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2024-11-13 15:09:40,737 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5628930817610063 [2024-11-13 15:09:40,737 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 493 flow. Second operand 6 states and 358 transitions. [2024-11-13 15:09:40,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 164 transitions, 906 flow [2024-11-13 15:09:40,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 164 transitions, 893 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:09:40,743 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 522 flow [2024-11-13 15:09:40,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=522, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-11-13 15:09:40,744 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 15 predicate places. [2024-11-13 15:09:40,744 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 522 flow [2024-11-13 15:09:40,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 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) [2024-11-13 15:09:40,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:40,745 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:40,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-13 15:09:40,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-13 15:09:40,949 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:40,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:40,949 INFO L85 PathProgramCache]: Analyzing trace with hash -842684569, now seen corresponding path program 1 times [2024-11-13 15:09:40,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:40,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777849055] [2024-11-13 15:09:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:40,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:41,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:09:41,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:41,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777849055] [2024-11-13 15:09:41,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777849055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:41,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:41,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:09:41,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048111458] [2024-11-13 15:09:41,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:41,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:09:41,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:41,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:09:41,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:09:41,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-13 15:09:41,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 522 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:41,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:41,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-13 15:09:41,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:42,112 INFO L124 PetriNetUnfolderBase]: 6823/13586 cut-off events. [2024-11-13 15:09:42,113 INFO L125 PetriNetUnfolderBase]: For 428/428 co-relation queries the response was YES. [2024-11-13 15:09:42,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23715 conditions, 13586 events. 6823/13586 cut-off events. For 428/428 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 136577 event pairs, 5150 based on Foata normal form. 2/7347 useless extension candidates. Maximal degree in co-relation 23589. Up to 9421 conditions per place. [2024-11-13 15:09:42,198 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 81 selfloop transitions, 9 changer transitions 0/120 dead transitions. [2024-11-13 15:09:42,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 120 transitions, 700 flow [2024-11-13 15:09:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-13 15:09:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-13 15:09:42,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-13 15:09:42,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-11-13 15:09:42,200 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 522 flow. Second operand 3 states and 185 transitions. [2024-11-13 15:09:42,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 120 transitions, 700 flow [2024-11-13 15:09:42,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 120 transitions, 688 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-13 15:09:42,205 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 526 flow [2024-11-13 15:09:42,205 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=526, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2024-11-13 15:09:42,206 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 13 predicate places. [2024-11-13 15:09:42,206 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 526 flow [2024-11-13 15:09:42,206 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:42,207 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:42,207 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:42,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-13 15:09:42,207 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:42,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:42,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1928990359, now seen corresponding path program 1 times [2024-11-13 15:09:42,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:42,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336548168] [2024-11-13 15:09:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:42,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:42,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336548168] [2024-11-13 15:09:42,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336548168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:42,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566503854] [2024-11-13 15:09:42,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:42,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:42,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:42,367 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:42,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-13 15:09:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:42,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-13 15:09:42,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:42,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:42,598 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:42,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566503854] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:42,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:42,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-13 15:09:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700885432] [2024-11-13 15:09:42,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:42,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-13 15:09:42,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:42,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-13 15:09:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:09:42,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 15:09:42,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 526 flow. Second operand has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:42,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:42,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 15:09:42,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:45,359 INFO L124 PetriNetUnfolderBase]: 11887/23663 cut-off events. [2024-11-13 15:09:45,359 INFO L125 PetriNetUnfolderBase]: For 843/843 co-relation queries the response was YES. [2024-11-13 15:09:45,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41177 conditions, 23663 events. 11887/23663 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 1671. Compared 253776 event pairs, 8787 based on Foata normal form. 1/12912 useless extension candidates. Maximal degree in co-relation 40996. Up to 9386 conditions per place. [2024-11-13 15:09:45,508 INFO L140 encePairwiseOnDemand]: 90/106 looper letters, 105 selfloop transitions, 55 changer transitions 0/190 dead transitions. [2024-11-13 15:09:45,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 190 transitions, 1144 flow [2024-11-13 15:09:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-13 15:09:45,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-13 15:09:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 650 transitions. [2024-11-13 15:09:45,512 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5110062893081762 [2024-11-13 15:09:45,512 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 526 flow. Second operand 12 states and 650 transitions. [2024-11-13 15:09:45,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 190 transitions, 1144 flow [2024-11-13 15:09:45,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 190 transitions, 1114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:09:45,523 INFO L231 Difference]: Finished difference. Result has 130 places, 146 transitions, 891 flow [2024-11-13 15:09:45,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=891, PETRI_PLACES=130, PETRI_TRANSITIONS=146} [2024-11-13 15:09:45,524 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 28 predicate places. [2024-11-13 15:09:45,524 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 146 transitions, 891 flow [2024-11-13 15:09:45,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:45,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:45,525 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:45,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-13 15:09:45,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:45,730 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:45,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash 770945811, now seen corresponding path program 1 times [2024-11-13 15:09:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:45,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267864058] [2024-11-13 15:09:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:45,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267864058] [2024-11-13 15:09:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267864058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:09:45,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:09:45,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-13 15:09:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33161933] [2024-11-13 15:09:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:09:45,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:09:45,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:45,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:09:45,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:09:45,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 15:09:45,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 146 transitions, 891 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:45,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:45,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 15:09:45,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:48,825 INFO L124 PetriNetUnfolderBase]: 12590/24435 cut-off events. [2024-11-13 15:09:48,825 INFO L125 PetriNetUnfolderBase]: For 1086/1086 co-relation queries the response was YES. [2024-11-13 15:09:48,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43671 conditions, 24435 events. 12590/24435 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 1700. Compared 256551 event pairs, 9350 based on Foata normal form. 147/13651 useless extension candidates. Maximal degree in co-relation 43568. Up to 16529 conditions per place. [2024-11-13 15:09:48,995 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 202 selfloop transitions, 3 changer transitions 0/235 dead transitions. [2024-11-13 15:09:48,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 235 transitions, 1996 flow [2024-11-13 15:09:48,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:09:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:09:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 274 transitions. [2024-11-13 15:09:48,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6462264150943396 [2024-11-13 15:09:48,997 INFO L175 Difference]: Start difference. First operand has 130 places, 146 transitions, 891 flow. Second operand 4 states and 274 transitions. [2024-11-13 15:09:48,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 235 transitions, 1996 flow [2024-11-13 15:09:49,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 235 transitions, 1969 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-11-13 15:09:49,015 INFO L231 Difference]: Finished difference. Result has 133 places, 146 transitions, 895 flow [2024-11-13 15:09:49,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=895, PETRI_PLACES=133, PETRI_TRANSITIONS=146} [2024-11-13 15:09:49,016 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 31 predicate places. [2024-11-13 15:09:49,016 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 146 transitions, 895 flow [2024-11-13 15:09:49,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:49,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:49,017 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:49,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-13 15:09:49,017 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:49,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:49,018 INFO L85 PathProgramCache]: Analyzing trace with hash 767055477, now seen corresponding path program 1 times [2024-11-13 15:09:49,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:49,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385422786] [2024-11-13 15:09:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:49,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:49,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:49,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385422786] [2024-11-13 15:09:49,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385422786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:49,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751041287] [2024-11-13 15:09:49,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:49,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:49,376 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:49,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-13 15:09:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:49,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-13 15:09:49,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:49,837 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 [2024-11-13 15:09:50,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:50,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:50,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:50,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751041287] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:50,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:50,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-13 15:09:50,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925899663] [2024-11-13 15:09:50,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:50,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-13 15:09:50,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:50,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-13 15:09:50,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-13 15:09:51,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:09:51,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 146 transitions, 895 flow. Second operand has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:51,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:51,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:09:51,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:09:54,661 INFO L124 PetriNetUnfolderBase]: 12566/24671 cut-off events. [2024-11-13 15:09:54,661 INFO L125 PetriNetUnfolderBase]: For 2285/2285 co-relation queries the response was YES. [2024-11-13 15:09:54,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48128 conditions, 24671 events. 12566/24671 cut-off events. For 2285/2285 co-relation queries the response was YES. Maximal size of possible extension queue 1698. Compared 262264 event pairs, 9326 based on Foata normal form. 12/14436 useless extension candidates. Maximal degree in co-relation 48027. Up to 17352 conditions per place. [2024-11-13 15:09:54,849 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 83 selfloop transitions, 33 changer transitions 0/145 dead transitions. [2024-11-13 15:09:54,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 145 transitions, 1123 flow [2024-11-13 15:09:54,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-13 15:09:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-13 15:09:54,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 342 transitions. [2024-11-13 15:09:54,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4609164420485175 [2024-11-13 15:09:54,852 INFO L175 Difference]: Start difference. First operand has 133 places, 146 transitions, 895 flow. Second operand 7 states and 342 transitions. [2024-11-13 15:09:54,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 145 transitions, 1123 flow [2024-11-13 15:09:54,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 145 transitions, 1118 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:09:54,866 INFO L231 Difference]: Finished difference. Result has 136 places, 145 transitions, 952 flow [2024-11-13 15:09:54,866 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=952, PETRI_PLACES=136, PETRI_TRANSITIONS=145} [2024-11-13 15:09:54,867 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 34 predicate places. [2024-11-13 15:09:54,867 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 145 transitions, 952 flow [2024-11-13 15:09:54,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:54,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:09:54,868 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:09:54,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-13 15:09:55,068 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-13 15:09:55,069 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:09:55,069 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:09:55,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1988148289, now seen corresponding path program 1 times [2024-11-13 15:09:55,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:09:55,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916088055] [2024-11-13 15:09:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:55,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:09:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:55,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:09:55,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916088055] [2024-11-13 15:09:55,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916088055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:09:55,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140062880] [2024-11-13 15:09:55,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:09:55,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:09:55,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:09:55,747 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:09:55,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-13 15:09:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:09:56,171 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-13 15:09:56,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:09:56,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-13 15:09:56,230 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 [2024-11-13 15:09:56,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:09:56,306 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 [2024-11-13 15:09:56,326 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:09:56,326 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 [2024-11-13 15:09:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:09:56,477 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 21 treesize of output 14 [2024-11-13 15:09:56,534 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:09:56,535 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 [2024-11-13 15:09:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:56,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:09:56,809 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-13 15:09:56,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-13 15:09:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-13 15:09:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:09:57,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140062880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:09:57,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:09:57,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-13 15:09:57,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881450512] [2024-11-13 15:09:57,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:09:57,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:09:57,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:09:57,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:09:57,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:09:59,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-13 15:09:59,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 145 transitions, 952 flow. Second operand has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:09:59,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:09:59,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-13 15:09:59,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:03,391 INFO L124 PetriNetUnfolderBase]: 13954/26847 cut-off events. [2024-11-13 15:10:03,392 INFO L125 PetriNetUnfolderBase]: For 2616/2616 co-relation queries the response was YES. [2024-11-13 15:10:03,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52981 conditions, 26847 events. 13954/26847 cut-off events. For 2616/2616 co-relation queries the response was YES. Maximal size of possible extension queue 1889. Compared 282348 event pairs, 10504 based on Foata normal form. 0/16018 useless extension candidates. Maximal degree in co-relation 52880. Up to 19210 conditions per place. [2024-11-13 15:10:03,613 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 118 selfloop transitions, 26 changer transitions 0/171 dead transitions. [2024-11-13 15:10:03,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 171 transitions, 1530 flow [2024-11-13 15:10:03,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-13 15:10:03,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-13 15:10:03,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 430 transitions. [2024-11-13 15:10:03,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4056603773584906 [2024-11-13 15:10:03,615 INFO L175 Difference]: Start difference. First operand has 136 places, 145 transitions, 952 flow. Second operand 10 states and 430 transitions. [2024-11-13 15:10:03,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 171 transitions, 1530 flow [2024-11-13 15:10:03,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 171 transitions, 1375 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-11-13 15:10:03,629 INFO L231 Difference]: Finished difference. Result has 138 places, 149 transitions, 957 flow [2024-11-13 15:10:03,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=957, PETRI_PLACES=138, PETRI_TRANSITIONS=149} [2024-11-13 15:10:03,631 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 36 predicate places. [2024-11-13 15:10:03,631 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 149 transitions, 957 flow [2024-11-13 15:10:03,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:03,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:03,632 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:03,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-13 15:10:03,836 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-13 15:10:03,836 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:10:03,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:03,836 INFO L85 PathProgramCache]: Analyzing trace with hash -456472412, now seen corresponding path program 2 times [2024-11-13 15:10:03,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:03,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38718321] [2024-11-13 15:10:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:03,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:04,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-13 15:10:04,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38718321] [2024-11-13 15:10:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38718321] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:04,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450611437] [2024-11-13 15:10:04,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-13 15:10:04,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:04,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:04,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:04,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-13 15:10:04,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-13 15:10:04,727 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-13 15:10:04,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-13 15:10:04,732 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:04,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-11-13 15:10:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:10:04,983 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-13 15:10:05,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-13 15:10:05,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450611437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-13 15:10:05,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-13 15:10:05,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-13 15:10:05,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700722816] [2024-11-13 15:10:05,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-13 15:10:05,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-13 15:10:05,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:05,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-13 15:10:05,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-13 15:10:06,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-13 15:10:06,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 149 transitions, 957 flow. Second operand has 18 states, 18 states have (on average 44.77777777777778) internal successors, (806), 18 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:06,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:06,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-13 15:10:06,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:13,325 INFO L124 PetriNetUnfolderBase]: 17847/35350 cut-off events. [2024-11-13 15:10:13,325 INFO L125 PetriNetUnfolderBase]: For 3283/3283 co-relation queries the response was YES. [2024-11-13 15:10:13,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68696 conditions, 35350 events. 17847/35350 cut-off events. For 3283/3283 co-relation queries the response was YES. Maximal size of possible extension queue 2304. Compared 386879 event pairs, 13136 based on Foata normal form. 4/20772 useless extension candidates. Maximal degree in co-relation 67845. Up to 17434 conditions per place. [2024-11-13 15:10:13,589 INFO L140 encePairwiseOnDemand]: 90/106 looper letters, 138 selfloop transitions, 55 changer transitions 0/220 dead transitions. [2024-11-13 15:10:13,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 220 transitions, 1709 flow [2024-11-13 15:10:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-13 15:10:13,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-13 15:10:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 853 transitions. [2024-11-13 15:10:13,596 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4733629300776915 [2024-11-13 15:10:13,596 INFO L175 Difference]: Start difference. First operand has 138 places, 149 transitions, 957 flow. Second operand 17 states and 853 transitions. [2024-11-13 15:10:13,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 220 transitions, 1709 flow [2024-11-13 15:10:13,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 220 transitions, 1579 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-11-13 15:10:13,622 INFO L231 Difference]: Finished difference. Result has 149 places, 177 transitions, 1271 flow [2024-11-13 15:10:13,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1271, PETRI_PLACES=149, PETRI_TRANSITIONS=177} [2024-11-13 15:10:13,627 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 47 predicate places. [2024-11-13 15:10:13,627 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 177 transitions, 1271 flow [2024-11-13 15:10:13,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 44.77777777777778) internal successors, (806), 18 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:13,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:13,628 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:13,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-13 15:10:13,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-13 15:10:13,828 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:10:13,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:13,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1883444749, now seen corresponding path program 1 times [2024-11-13 15:10:13,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:13,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271341231] [2024-11-13 15:10:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:13,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:13,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:13,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:10:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271341231] [2024-11-13 15:10:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271341231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:10:13,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:10:13,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-13 15:10:13,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843277992] [2024-11-13 15:10:13,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:10:13,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-13 15:10:13,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:13,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-13 15:10:13,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-13 15:10:13,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 15:10:13,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 177 transitions, 1271 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:13,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:13,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 15:10:13,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:19,942 INFO L124 PetriNetUnfolderBase]: 18747/37111 cut-off events. [2024-11-13 15:10:19,942 INFO L125 PetriNetUnfolderBase]: For 3803/3803 co-relation queries the response was YES. [2024-11-13 15:10:20,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73197 conditions, 37111 events. 18747/37111 cut-off events. For 3803/3803 co-relation queries the response was YES. Maximal size of possible extension queue 2356. Compared 404455 event pairs, 13770 based on Foata normal form. 293/22916 useless extension candidates. Maximal degree in co-relation 71042. Up to 24866 conditions per place. [2024-11-13 15:10:20,291 INFO L140 encePairwiseOnDemand]: 89/106 looper letters, 192 selfloop transitions, 36 changer transitions 0/255 dead transitions. [2024-11-13 15:10:20,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 255 transitions, 2325 flow [2024-11-13 15:10:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:10:20,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:10:20,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 321 transitions. [2024-11-13 15:10:20,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6056603773584905 [2024-11-13 15:10:20,294 INFO L175 Difference]: Start difference. First operand has 149 places, 177 transitions, 1271 flow. Second operand 5 states and 321 transitions. [2024-11-13 15:10:20,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 255 transitions, 2325 flow [2024-11-13 15:10:20,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 255 transitions, 2189 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-11-13 15:10:20,321 INFO L231 Difference]: Finished difference. Result has 151 places, 201 transitions, 1644 flow [2024-11-13 15:10:20,321 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1644, PETRI_PLACES=151, PETRI_TRANSITIONS=201} [2024-11-13 15:10:20,322 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 49 predicate places. [2024-11-13 15:10:20,322 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 201 transitions, 1644 flow [2024-11-13 15:10:20,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:20,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:20,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:20,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-13 15:10:20,323 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:10:20,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash 808282129, now seen corresponding path program 1 times [2024-11-13 15:10:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:20,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830145787] [2024-11-13 15:10:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:10:20,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830145787] [2024-11-13 15:10:20,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830145787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:20,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54939676] [2024-11-13 15:10:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:20,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:20,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:20,931 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:20,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-13 15:10:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:21,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-13 15:10:21,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:21,172 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 [2024-11-13 15:10:21,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:10:21,265 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 [2024-11-13 15:10:21,289 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 15:10:21,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-13 15:10:21,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:10:21,327 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 [2024-11-13 15:10:21,335 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-13 15:10:21,336 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 [2024-11-13 15:10:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:10:21,383 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:10:21,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54939676] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:10:21,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:10:21,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-13 15:10:21,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323218248] [2024-11-13 15:10:21,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:10:21,384 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:10:21,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:21,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:10:21,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-13 15:10:21,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-13 15:10:21,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 201 transitions, 1644 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:21,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:21,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-13 15:10:21,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:25,242 INFO L124 PetriNetUnfolderBase]: 11799/23163 cut-off events. [2024-11-13 15:10:25,242 INFO L125 PetriNetUnfolderBase]: For 5279/5387 co-relation queries the response was YES. [2024-11-13 15:10:25,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51494 conditions, 23163 events. 11799/23163 cut-off events. For 5279/5387 co-relation queries the response was YES. Maximal size of possible extension queue 1409. Compared 234618 event pairs, 8918 based on Foata normal form. 0/15622 useless extension candidates. Maximal degree in co-relation 51378. Up to 16966 conditions per place. [2024-11-13 15:10:25,453 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 154 selfloop transitions, 16 changer transitions 0/197 dead transitions. [2024-11-13 15:10:25,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 197 transitions, 1964 flow [2024-11-13 15:10:25,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-13 15:10:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-13 15:10:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-11-13 15:10:25,455 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-11-13 15:10:25,455 INFO L175 Difference]: Start difference. First operand has 151 places, 201 transitions, 1644 flow. Second operand 4 states and 215 transitions. [2024-11-13 15:10:25,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 197 transitions, 1964 flow [2024-11-13 15:10:25,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 197 transitions, 1956 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-13 15:10:25,484 INFO L231 Difference]: Finished difference. Result has 149 places, 197 transitions, 1648 flow [2024-11-13 15:10:25,485 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1648, PETRI_PLACES=149, PETRI_TRANSITIONS=197} [2024-11-13 15:10:25,486 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 47 predicate places. [2024-11-13 15:10:25,486 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 197 transitions, 1648 flow [2024-11-13 15:10:25,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:25,486 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:25,486 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:25,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-13 15:10:25,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:25,687 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:10:25,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash 808282130, now seen corresponding path program 1 times [2024-11-13 15:10:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:25,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675799480] [2024-11-13 15:10:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-13 15:10:26,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:26,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675799480] [2024-11-13 15:10:26,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675799480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:10:26,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:10:26,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-13 15:10:26,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677267628] [2024-11-13 15:10:26,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:10:26,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-13 15:10:26,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:26,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-13 15:10:26,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-13 15:10:26,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-13 15:10:26,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 197 transitions, 1648 flow. Second operand has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:26,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:26,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-13 15:10:26,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:30,222 INFO L124 PetriNetUnfolderBase]: 11561/21719 cut-off events. [2024-11-13 15:10:30,223 INFO L125 PetriNetUnfolderBase]: For 5348/5348 co-relation queries the response was YES. [2024-11-13 15:10:30,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48654 conditions, 21719 events. 11561/21719 cut-off events. For 5348/5348 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 210056 event pairs, 9041 based on Foata normal form. 0/15894 useless extension candidates. Maximal degree in co-relation 48538. Up to 16550 conditions per place. [2024-11-13 15:10:30,648 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 110 selfloop transitions, 60 changer transitions 0/193 dead transitions. [2024-11-13 15:10:30,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 193 transitions, 1976 flow [2024-11-13 15:10:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:10:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:10:30,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 235 transitions. [2024-11-13 15:10:30,650 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-11-13 15:10:30,650 INFO L175 Difference]: Start difference. First operand has 149 places, 197 transitions, 1648 flow. Second operand 5 states and 235 transitions. [2024-11-13 15:10:30,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 193 transitions, 1976 flow [2024-11-13 15:10:30,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 193 transitions, 1956 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-13 15:10:30,673 INFO L231 Difference]: Finished difference. Result has 147 places, 193 transitions, 1736 flow [2024-11-13 15:10:30,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1616, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1736, PETRI_PLACES=147, PETRI_TRANSITIONS=193} [2024-11-13 15:10:30,674 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 45 predicate places. [2024-11-13 15:10:30,674 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 193 transitions, 1736 flow [2024-11-13 15:10:30,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:30,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:30,675 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:30,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-13 15:10:30,675 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:10:30,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:30,676 INFO L85 PathProgramCache]: Analyzing trace with hash 808282131, now seen corresponding path program 1 times [2024-11-13 15:10:30,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:30,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653948385] [2024-11-13 15:10:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:10:31,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653948385] [2024-11-13 15:10:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653948385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-13 15:10:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938150231] [2024-11-13 15:10:31,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:31,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-13 15:10:31,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 [2024-11-13 15:10:31,405 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-13 15:10:31,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-13 15:10:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:31,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-13 15:10:31,628 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-13 15:10:31,638 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 [2024-11-13 15:10:31,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:10:31,754 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 [2024-11-13 15:10:31,781 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-13 15:10:31,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-13 15:10:31,844 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-13 15:10:31,844 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 [2024-11-13 15:10:31,887 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-13 15:10:31,887 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 [2024-11-13 15:10:31,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:10:31,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:32,035 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-13 15:10:32,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2024-11-13 15:10:32,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-13 15:10:32,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-13 15:10:32,145 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-13 15:10:32,145 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 [2024-11-13 15:10:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:10:32,207 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-13 15:10:32,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938150231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:10:32,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-13 15:10:32,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 12 [2024-11-13 15:10:32,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76028258] [2024-11-13 15:10:32,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:10:32,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-13 15:10:32,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:32,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-13 15:10:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-13 15:10:32,605 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-13 15:10:32,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 193 transitions, 1736 flow. Second operand has 8 states, 8 states have (on average 37.5) internal successors, (300), 8 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:32,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:32,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-13 15:10:32,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-13 15:10:35,551 INFO L124 PetriNetUnfolderBase]: 10135/19271 cut-off events. [2024-11-13 15:10:35,551 INFO L125 PetriNetUnfolderBase]: For 5573/5573 co-relation queries the response was YES. [2024-11-13 15:10:35,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42434 conditions, 19271 events. 10135/19271 cut-off events. For 5573/5573 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 184975 event pairs, 8120 based on Foata normal form. 0/14728 useless extension candidates. Maximal degree in co-relation 42318. Up to 14694 conditions per place. [2024-11-13 15:10:35,722 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 109 selfloop transitions, 60 changer transitions 0/192 dead transitions. [2024-11-13 15:10:35,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 192 transitions, 2068 flow [2024-11-13 15:10:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-13 15:10:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-13 15:10:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-11-13 15:10:35,723 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4358490566037736 [2024-11-13 15:10:35,724 INFO L175 Difference]: Start difference. First operand has 147 places, 193 transitions, 1736 flow. Second operand 5 states and 231 transitions. [2024-11-13 15:10:35,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 192 transitions, 2068 flow [2024-11-13 15:10:35,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 192 transitions, 1948 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-13 15:10:35,756 INFO L231 Difference]: Finished difference. Result has 146 places, 192 transitions, 1730 flow [2024-11-13 15:10:35,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1730, PETRI_PLACES=146, PETRI_TRANSITIONS=192} [2024-11-13 15:10:35,757 INFO L277 CegarLoopForPetriNet]: 102 programPoint places, 44 predicate places. [2024-11-13 15:10:35,757 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 192 transitions, 1730 flow [2024-11-13 15:10:35,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.5) internal successors, (300), 8 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:35,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-13 15:10:35,757 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-13 15:10:35,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-13 15:10:35,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_459fc9f9-0957-4aad-b092-250346acbd0a/bin/uautomizer-verify-qhAvR1uOyd/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-13 15:10:35,958 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-13 15:10:35,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-13 15:10:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1337883285, now seen corresponding path program 1 times [2024-11-13 15:10:35,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-13 15:10:35,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717371304] [2024-11-13 15:10:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-13 15:10:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-13 15:10:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-13 15:10:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-13 15:10:36,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-13 15:10:36,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717371304] [2024-11-13 15:10:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717371304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-13 15:10:36,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-13 15:10:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-13 15:10:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260010680] [2024-11-13 15:10:36,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-13 15:10:36,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-13 15:10:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-13 15:10:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-13 15:10:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-13 15:10:36,037 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-13 15:10:36,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 192 transitions, 1730 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-13 15:10:36,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-13 15:10:36,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-13 15:10:36,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand