./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX --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 c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:42:45,682 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:42:45,782 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:42:45,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:42:45,788 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:42:45,832 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:42:45,835 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:42:45,835 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:42:45,836 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:42:45,837 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:42:45,839 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:42:45,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:42:45,840 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:42:45,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:42:45,841 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:42:45,841 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:42:45,842 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:42:45,842 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:42:45,843 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:42:45,843 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:42:45,843 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:42:45,848 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:42:45,848 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:42:45,848 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:42:45,849 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:42:45,849 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:42:45,849 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:42:45,850 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:42:45,850 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:42:45,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:42:45,851 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:42:45,851 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:42:45,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:42:45,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:42:45,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:42:45,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:42:45,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:42:45,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:42:45,857 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:42:45,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:42:45,858 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:42:45,858 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:42:45,858 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c031a4ce44fce05276ee0c322906dbff86776176e55e116d257d2b83e85a253c [2024-11-08 17:42:46,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:42:46,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:42:46,224 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:42:46,225 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:42:46,226 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:42:46,227 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c Unable to find full path for "g++" [2024-11-08 17:42:48,298 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:42:48,492 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:42:48,493 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/sv-benchmarks/c/weaver/popl20-more-buffer-series3.wvr.c [2024-11-08 17:42:48,504 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/data/dd3a91bf6/90f87f3803b54aeca3e4af14c65bdfda/FLAGcc1b8e814 [2024-11-08 17:42:48,868 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/data/dd3a91bf6/90f87f3803b54aeca3e4af14c65bdfda [2024-11-08 17:42:48,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:42:48,871 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:42:48,873 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:42:48,873 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:42:48,880 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:42:48,881 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:42:48" (1/1) ... [2024-11-08 17:42:48,884 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d449bb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:48, skipping insertion in model container [2024-11-08 17:42:48,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:42:48" (1/1) ... [2024-11-08 17:42:48,916 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:42:49,172 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:42:49,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:42:49,192 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:42:49,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:42:49,252 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:42:49,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49 WrapperNode [2024-11-08 17:42:49,253 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:42:49,254 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:42:49,254 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:42:49,255 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:42:49,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,274 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,361 INFO L138 Inliner]: procedures = 26, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 335 [2024-11-08 17:42:49,367 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:42:49,367 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:42:49,368 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:42:49,368 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:42:49,395 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,395 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,405 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,445 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-08 17:42:49,449 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,485 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,493 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,501 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:42:49,503 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:42:49,506 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:42:49,506 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:42:49,507 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (1/1) ... [2024-11-08 17:42:49,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:42:49,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:42:49,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:42:49,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:42:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:42:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:42:49,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:42:49,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:42:49,588 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:42:49,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:42:49,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:42:49,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:42:49,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:42:49,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 17:42:49,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 17:42:49,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-08 17:42:49,590 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-08 17:42:49,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:42:49,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:42:49,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 17:42:49,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 17:42:49,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:42:49,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:42:49,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:42:49,595 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:42:49,755 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:42:49,757 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:42:50,467 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:42:50,468 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:42:51,091 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:42:51,092 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:42:51,092 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:42:51 BoogieIcfgContainer [2024-11-08 17:42:51,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:42:51,095 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:42:51,096 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:42:51,100 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:42:51,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:42:48" (1/3) ... [2024-11-08 17:42:51,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7812724a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:42:51, skipping insertion in model container [2024-11-08 17:42:51,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:42:49" (2/3) ... [2024-11-08 17:42:51,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7812724a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:42:51, skipping insertion in model container [2024-11-08 17:42:51,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:42:51" (3/3) ... [2024-11-08 17:42:51,105 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series3.wvr.c [2024-11-08 17:42:51,126 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:42:51,127 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-08 17:42:51,127 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:42:51,232 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-08 17:42:51,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 97 places, 98 transitions, 224 flow [2024-11-08 17:42:51,340 INFO L124 PetriNetUnfolderBase]: 14/94 cut-off events. [2024-11-08 17:42:51,340 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-08 17:42:51,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 14/94 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 249 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 78. Up to 2 conditions per place. [2024-11-08 17:42:51,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 97 places, 98 transitions, 224 flow [2024-11-08 17:42:51,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 93 transitions, 210 flow [2024-11-08 17:42:51,364 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:42:51,370 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;@37a066a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:42:51,371 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-08 17:42:51,375 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:42:51,375 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 17:42:51,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:42:51,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:42:51,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:42:51,377 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:42:51,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:42:51,383 INFO L85 PathProgramCache]: Analyzing trace with hash 32226551, now seen corresponding path program 1 times [2024-11-08 17:42:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:42:51,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635389621] [2024-11-08 17:42:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:42:51,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:42:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:42:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:42:51,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:42:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635389621] [2024-11-08 17:42:51,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635389621] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:42:51,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:42:51,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:42:51,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497461272] [2024-11-08 17:42:51,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:42:51,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:42:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:42:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:42:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:42:51,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 98 [2024-11-08 17:42:51,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:42:51,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:42:51,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 98 [2024-11-08 17:42:51,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:42:56,763 INFO L124 PetriNetUnfolderBase]: 18850/27064 cut-off events. [2024-11-08 17:42:56,764 INFO L125 PetriNetUnfolderBase]: For 372/372 co-relation queries the response was YES. [2024-11-08 17:42:56,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49909 conditions, 27064 events. 18850/27064 cut-off events. For 372/372 co-relation queries the response was YES. Maximal size of possible extension queue 2193. Compared 199687 event pairs, 11530 based on Foata normal form. 1/12689 useless extension candidates. Maximal degree in co-relation 47793. Up to 21814 conditions per place. [2024-11-08 17:42:57,149 INFO L140 encePairwiseOnDemand]: 90/98 looper letters, 43 selfloop transitions, 2 changer transitions 0/86 dead transitions. [2024-11-08 17:42:57,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 286 flow [2024-11-08 17:42:57,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:42:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:42:57,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2024-11-08 17:42:57,164 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-08 17:42:57,167 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 210 flow. Second operand 3 states and 189 transitions. [2024-11-08 17:42:57,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 286 flow [2024-11-08 17:42:57,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 86 transitions, 270 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-08 17:42:57,347 INFO L231 Difference]: Finished difference. Result has 79 places, 86 transitions, 184 flow [2024-11-08 17:42:57,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=79, PETRI_TRANSITIONS=86} [2024-11-08 17:42:57,357 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -13 predicate places. [2024-11-08 17:42:57,357 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 86 transitions, 184 flow [2024-11-08 17:42:57,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:42:57,358 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:42:57,358 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:42:57,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:42:57,360 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:42:57,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:42:57,361 INFO L85 PathProgramCache]: Analyzing trace with hash 32226552, now seen corresponding path program 1 times [2024-11-08 17:42:57,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:42:57,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31654165] [2024-11-08 17:42:57,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:42:57,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:42:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:42:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:42:57,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:42:57,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31654165] [2024-11-08 17:42:57,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31654165] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:42:57,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:42:57,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:42:57,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142072887] [2024-11-08 17:42:57,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:42:57,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:42:57,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:42:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:42:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:42:58,040 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 98 [2024-11-08 17:42:58,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 86 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:42:58,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:42:58,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 98 [2024-11-08 17:42:58,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:01,798 INFO L124 PetriNetUnfolderBase]: 18852/27071 cut-off events. [2024-11-08 17:43:01,798 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-08 17:43:01,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49310 conditions, 27071 events. 18852/27071 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 2193. Compared 199590 event pairs, 11530 based on Foata normal form. 0/12687 useless extension candidates. Maximal degree in co-relation 49247. Up to 21837 conditions per place. [2024-11-08 17:43:02,019 INFO L140 encePairwiseOnDemand]: 93/98 looper letters, 59 selfloop transitions, 5 changer transitions 0/93 dead transitions. [2024-11-08 17:43:02,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 93 transitions, 326 flow [2024-11-08 17:43:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:43:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:43:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 213 transitions. [2024-11-08 17:43:02,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5433673469387755 [2024-11-08 17:43:02,022 INFO L175 Difference]: Start difference. First operand has 79 places, 86 transitions, 184 flow. Second operand 4 states and 213 transitions. [2024-11-08 17:43:02,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 93 transitions, 326 flow [2024-11-08 17:43:02,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 93 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:43:02,027 INFO L231 Difference]: Finished difference. Result has 82 places, 90 transitions, 212 flow [2024-11-08 17:43:02,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=82, PETRI_TRANSITIONS=90} [2024-11-08 17:43:02,028 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -10 predicate places. [2024-11-08 17:43:02,029 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 90 transitions, 212 flow [2024-11-08 17:43:02,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:02,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:02,030 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:43:02,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:43:02,031 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:02,032 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:02,034 INFO L85 PathProgramCache]: Analyzing trace with hash 903761094, now seen corresponding path program 1 times [2024-11-08 17:43:02,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:02,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487548309] [2024-11-08 17:43:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:02,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:02,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487548309] [2024-11-08 17:43:02,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487548309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:43:02,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:43:02,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:43:02,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658196002] [2024-11-08 17:43:02,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:43:02,511 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:43:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:43:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:43:02,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 98 [2024-11-08 17:43:02,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 90 transitions, 212 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) [2024-11-08 17:43:02,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:02,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 98 [2024-11-08 17:43:02,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:05,601 INFO L124 PetriNetUnfolderBase]: 18854/27078 cut-off events. [2024-11-08 17:43:05,602 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-08 17:43:05,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49337 conditions, 27078 events. 18854/27078 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 2189. Compared 199920 event pairs, 11530 based on Foata normal form. 0/12694 useless extension candidates. Maximal degree in co-relation 49298. Up to 21836 conditions per place. [2024-11-08 17:43:05,868 INFO L140 encePairwiseOnDemand]: 90/98 looper letters, 62 selfloop transitions, 9 changer transitions 0/100 dead transitions. [2024-11-08 17:43:05,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 100 transitions, 374 flow [2024-11-08 17:43:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:43:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:43:05,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-11-08 17:43:05,874 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5244897959183673 [2024-11-08 17:43:05,876 INFO L175 Difference]: Start difference. First operand has 82 places, 90 transitions, 212 flow. Second operand 5 states and 257 transitions. [2024-11-08 17:43:05,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 100 transitions, 374 flow [2024-11-08 17:43:05,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 100 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:43:05,881 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 258 flow [2024-11-08 17:43:05,883 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=258, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-11-08 17:43:05,884 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -4 predicate places. [2024-11-08 17:43:05,885 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 258 flow [2024-11-08 17:43:05,885 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) [2024-11-08 17:43:05,886 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:05,886 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:43:05,886 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:43:05,887 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:05,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:05,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2010428297, now seen corresponding path program 1 times [2024-11-08 17:43:05,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:05,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263884958] [2024-11-08 17:43:05,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:05,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:06,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:06,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263884958] [2024-11-08 17:43:06,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263884958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:43:06,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25655824] [2024-11-08 17:43:06,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:06,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:43:06,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:43:06,323 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:43:06,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:43:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:06,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:43:06,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:43:06,526 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 [2024-11-08 17:43:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:06,952 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:43:07,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:07,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25655824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:43:07,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:43:07,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 17:43:07,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900650171] [2024-11-08 17:43:07,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:43:07,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:43:07,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:43:07,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:43:07,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 98 [2024-11-08 17:43:07,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 258 flow. Second operand has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:07,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:07,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 98 [2024-11-08 17:43:07,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:10,998 INFO L124 PetriNetUnfolderBase]: 18853/27076 cut-off events. [2024-11-08 17:43:10,998 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-08 17:43:11,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49355 conditions, 27076 events. 18853/27076 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 2189. Compared 199762 event pairs, 11530 based on Foata normal form. 0/12696 useless extension candidates. Maximal degree in co-relation 49311. Up to 21831 conditions per place. [2024-11-08 17:43:11,255 INFO L140 encePairwiseOnDemand]: 86/98 looper letters, 50 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-11-08 17:43:11,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 95 transitions, 390 flow [2024-11-08 17:43:11,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:43:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:43:11,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 323 transitions. [2024-11-08 17:43:11,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4708454810495627 [2024-11-08 17:43:11,259 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 258 flow. Second operand 7 states and 323 transitions. [2024-11-08 17:43:11,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 95 transitions, 390 flow [2024-11-08 17:43:11,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 95 transitions, 383 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:43:11,266 INFO L231 Difference]: Finished difference. Result has 92 places, 93 transitions, 283 flow [2024-11-08 17:43:11,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=283, PETRI_PLACES=92, PETRI_TRANSITIONS=93} [2024-11-08 17:43:11,267 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 0 predicate places. [2024-11-08 17:43:11,267 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 93 transitions, 283 flow [2024-11-08 17:43:11,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:11,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:11,269 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:43:11,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:43:11,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:43:11,470 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:11,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash 929406245, now seen corresponding path program 1 times [2024-11-08 17:43:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072040290] [2024-11-08 17:43:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:11,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:11,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:11,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:11,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072040290] [2024-11-08 17:43:11,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072040290] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:43:11,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:43:11,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:43:11,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705696307] [2024-11-08 17:43:11,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:43:11,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:43:11,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:11,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:43:11,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:43:11,989 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 98 [2024-11-08 17:43:11,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 93 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:11,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:11,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 98 [2024-11-08 17:43:11,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:15,156 INFO L124 PetriNetUnfolderBase]: 18855/27083 cut-off events. [2024-11-08 17:43:15,156 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-08 17:43:15,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49389 conditions, 27083 events. 18855/27083 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 2189. Compared 199932 event pairs, 11530 based on Foata normal form. 0/12708 useless extension candidates. Maximal degree in co-relation 49361. Up to 21841 conditions per place. [2024-11-08 17:43:15,406 INFO L140 encePairwiseOnDemand]: 89/98 looper letters, 61 selfloop transitions, 12 changer transitions 0/102 dead transitions. [2024-11-08 17:43:15,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 102 transitions, 455 flow [2024-11-08 17:43:15,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:43:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:43:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2024-11-08 17:43:15,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-11-08 17:43:15,409 INFO L175 Difference]: Start difference. First operand has 92 places, 93 transitions, 283 flow. Second operand 5 states and 255 transitions. [2024-11-08 17:43:15,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 102 transitions, 455 flow [2024-11-08 17:43:15,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 102 transitions, 411 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-08 17:43:15,413 INFO L231 Difference]: Finished difference. Result has 92 places, 97 transitions, 301 flow [2024-11-08 17:43:15,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=301, PETRI_PLACES=92, PETRI_TRANSITIONS=97} [2024-11-08 17:43:15,414 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 0 predicate places. [2024-11-08 17:43:15,415 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 97 transitions, 301 flow [2024-11-08 17:43:15,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:15,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:15,415 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 17:43:15,416 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:43:15,416 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:15,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1202171485, now seen corresponding path program 1 times [2024-11-08 17:43:15,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:15,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430119948] [2024-11-08 17:43:15,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:15,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:15,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430119948] [2024-11-08 17:43:15,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430119948] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:43:15,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298344332] [2024-11-08 17:43:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:15,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:43:15,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:43:15,841 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:43:15,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:43:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:15,948 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 17:43:15,950 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:43:15,973 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 [2024-11-08 17:43:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:16,310 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:43:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:16,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298344332] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:43:16,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:43:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 17:43:16,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487138753] [2024-11-08 17:43:16,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:43:16,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:43:16,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:16,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:43:16,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:43:16,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 98 [2024-11-08 17:43:16,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 97 transitions, 301 flow. Second operand has 14 states, 14 states have (on average 38.785714285714285) internal successors, (543), 14 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:16,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:16,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 98 [2024-11-08 17:43:16,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:20,351 INFO L124 PetriNetUnfolderBase]: 18856/27091 cut-off events. [2024-11-08 17:43:20,351 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-11-08 17:43:20,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49411 conditions, 27091 events. 18856/27091 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 2189. Compared 199842 event pairs, 11530 based on Foata normal form. 0/12714 useless extension candidates. Maximal degree in co-relation 49371. Up to 21826 conditions per place. [2024-11-08 17:43:20,562 INFO L140 encePairwiseOnDemand]: 86/98 looper letters, 56 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-11-08 17:43:20,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 110 transitions, 506 flow [2024-11-08 17:43:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:43:20,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:43:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 451 transitions. [2024-11-08 17:43:20,564 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4602040816326531 [2024-11-08 17:43:20,565 INFO L175 Difference]: Start difference. First operand has 92 places, 97 transitions, 301 flow. Second operand 10 states and 451 transitions. [2024-11-08 17:43:20,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 110 transitions, 506 flow [2024-11-08 17:43:20,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 110 transitions, 505 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:43:20,570 INFO L231 Difference]: Finished difference. Result has 101 places, 102 transitions, 389 flow [2024-11-08 17:43:20,571 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=389, PETRI_PLACES=101, PETRI_TRANSITIONS=102} [2024-11-08 17:43:20,572 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2024-11-08 17:43:20,572 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 102 transitions, 389 flow [2024-11-08 17:43:20,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.785714285714285) internal successors, (543), 14 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:20,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:20,573 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:43:20,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:43:20,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 17:43:20,774 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:20,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1711655117, now seen corresponding path program 1 times [2024-11-08 17:43:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290264135] [2024-11-08 17:43:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:21,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:21,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290264135] [2024-11-08 17:43:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290264135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:43:21,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756199748] [2024-11-08 17:43:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:21,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:43:21,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:43:21,267 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:43:21,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:43:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:21,409 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:43:21,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:43:21,441 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 [2024-11-08 17:43:21,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:21,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:43:22,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:22,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756199748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:43:22,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:43:22,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 17:43:22,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617458057] [2024-11-08 17:43:22,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:43:22,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:43:22,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:43:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:43:26,117 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 98 [2024-11-08 17:43:26,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 102 transitions, 389 flow. Second operand has 14 states, 14 states have (on average 34.07142857142857) internal successors, (477), 14 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:26,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:26,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 98 [2024-11-08 17:43:26,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:29,912 INFO L124 PetriNetUnfolderBase]: 20102/28914 cut-off events. [2024-11-08 17:43:29,912 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-08 17:43:30,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55055 conditions, 28914 events. 20102/28914 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1952. Compared 219225 event pairs, 17725 based on Foata normal form. 2/16826 useless extension candidates. Maximal degree in co-relation 55012. Up to 25425 conditions per place. [2024-11-08 17:43:30,115 INFO L140 encePairwiseOnDemand]: 86/98 looper letters, 61 selfloop transitions, 27 changer transitions 0/112 dead transitions. [2024-11-08 17:43:30,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 595 flow [2024-11-08 17:43:30,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 17:43:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 17:43:30,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 405 transitions. [2024-11-08 17:43:30,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.413265306122449 [2024-11-08 17:43:30,118 INFO L175 Difference]: Start difference. First operand has 101 places, 102 transitions, 389 flow. Second operand 10 states and 405 transitions. [2024-11-08 17:43:30,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 595 flow [2024-11-08 17:43:30,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 112 transitions, 530 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-08 17:43:30,124 INFO L231 Difference]: Finished difference. Result has 103 places, 104 transitions, 404 flow [2024-11-08 17:43:30,124 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=404, PETRI_PLACES=103, PETRI_TRANSITIONS=104} [2024-11-08 17:43:30,125 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 11 predicate places. [2024-11-08 17:43:30,125 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 104 transitions, 404 flow [2024-11-08 17:43:30,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 34.07142857142857) internal successors, (477), 14 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:30,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:30,127 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:43:30,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:43:30,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_19491ad9-2957-4fa3-a892-60725f9071ff/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 17:43:30,331 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:30,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -157653660, now seen corresponding path program 1 times [2024-11-08 17:43:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:30,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907430917] [2024-11-08 17:43:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:30,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:30,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:30,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:30,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907430917] [2024-11-08 17:43:30,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907430917] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:43:30,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:43:30,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:43:30,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019783006] [2024-11-08 17:43:30,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:43:30,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:43:30,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:30,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:43:30,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:43:30,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 98 [2024-11-08 17:43:30,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 104 transitions, 404 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:30,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:30,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 98 [2024-11-08 17:43:30,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:34,819 INFO L124 PetriNetUnfolderBase]: 20402/29610 cut-off events. [2024-11-08 17:43:34,819 INFO L125 PetriNetUnfolderBase]: For 127/127 co-relation queries the response was YES. [2024-11-08 17:43:34,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54022 conditions, 29610 events. 20402/29610 cut-off events. For 127/127 co-relation queries the response was YES. Maximal size of possible extension queue 2208. Compared 222544 event pairs, 12584 based on Foata normal form. 387/14682 useless extension candidates. Maximal degree in co-relation 53969. Up to 21850 conditions per place. [2024-11-08 17:43:35,138 INFO L140 encePairwiseOnDemand]: 82/98 looper letters, 108 selfloop transitions, 10 changer transitions 0/156 dead transitions. [2024-11-08 17:43:35,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 156 transitions, 831 flow [2024-11-08 17:43:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:43:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:43:35,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 322 transitions. [2024-11-08 17:43:35,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-11-08 17:43:35,140 INFO L175 Difference]: Start difference. First operand has 103 places, 104 transitions, 404 flow. Second operand 5 states and 322 transitions. [2024-11-08 17:43:35,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 156 transitions, 831 flow [2024-11-08 17:43:35,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 156 transitions, 719 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-08 17:43:35,147 INFO L231 Difference]: Finished difference. Result has 102 places, 111 transitions, 427 flow [2024-11-08 17:43:35,147 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=102, PETRI_TRANSITIONS=111} [2024-11-08 17:43:35,148 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 10 predicate places. [2024-11-08 17:43:35,149 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 111 transitions, 427 flow [2024-11-08 17:43:35,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:35,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:35,150 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:43:35,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:43:35,150 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:35,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:35,151 INFO L85 PathProgramCache]: Analyzing trace with hash -20323086, now seen corresponding path program 1 times [2024-11-08 17:43:35,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:35,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345679995] [2024-11-08 17:43:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:35,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:43:35,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345679995] [2024-11-08 17:43:35,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345679995] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:43:35,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:43:35,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:43:35,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570110804] [2024-11-08 17:43:35,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:43:35,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:43:35,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:35,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:43:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:43:35,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 98 [2024-11-08 17:43:35,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 111 transitions, 427 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:35,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:35,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 98 [2024-11-08 17:43:35,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:40,144 INFO L124 PetriNetUnfolderBase]: 22512/34408 cut-off events. [2024-11-08 17:43:40,144 INFO L125 PetriNetUnfolderBase]: For 2135/2135 co-relation queries the response was YES. [2024-11-08 17:43:40,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69610 conditions, 34408 events. 22512/34408 cut-off events. For 2135/2135 co-relation queries the response was YES. Maximal size of possible extension queue 2366. Compared 282526 event pairs, 13837 based on Foata normal form. 348/17455 useless extension candidates. Maximal degree in co-relation 69557. Up to 23795 conditions per place. [2024-11-08 17:43:40,654 INFO L140 encePairwiseOnDemand]: 84/98 looper letters, 102 selfloop transitions, 14 changer transitions 0/154 dead transitions. [2024-11-08 17:43:40,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 807 flow [2024-11-08 17:43:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:43:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:43:40,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 313 transitions. [2024-11-08 17:43:40,657 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6387755102040816 [2024-11-08 17:43:40,657 INFO L175 Difference]: Start difference. First operand has 102 places, 111 transitions, 427 flow. Second operand 5 states and 313 transitions. [2024-11-08 17:43:40,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 807 flow [2024-11-08 17:43:40,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 154 transitions, 799 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 17:43:40,676 INFO L231 Difference]: Finished difference. Result has 107 places, 118 transitions, 539 flow [2024-11-08 17:43:40,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=98, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=539, PETRI_PLACES=107, PETRI_TRANSITIONS=118} [2024-11-08 17:43:40,677 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 15 predicate places. [2024-11-08 17:43:40,678 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 118 transitions, 539 flow [2024-11-08 17:43:40,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:43:40,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:43:40,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:43:40,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 17:43:40,679 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 17:43:40,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:43:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1037751493, now seen corresponding path program 1 times [2024-11-08 17:43:40,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:43:40,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856233389] [2024-11-08 17:43:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:43:40,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:43:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:43:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:43:40,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:43:40,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856233389] [2024-11-08 17:43:40,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856233389] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:43:40,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:43:40,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:43:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850229794] [2024-11-08 17:43:40,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:43:40,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 17:43:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:43:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 17:43:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-08 17:43:41,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 98 [2024-11-08 17:43:41,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 118 transitions, 539 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) [2024-11-08 17:43:41,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:43:41,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 98 [2024-11-08 17:43:41,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:43:49,673 INFO L124 PetriNetUnfolderBase]: 36821/54418 cut-off events. [2024-11-08 17:43:49,673 INFO L125 PetriNetUnfolderBase]: For 5656/8701 co-relation queries the response was YES.