./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --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_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/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_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/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_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:39:03,333 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:39:03,443 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:39:03,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:39:03,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:39:03,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:39:03,500 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:39:03,500 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:39:03,501 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:39:03,503 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:39:03,503 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:39:03,504 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:39:03,505 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:39:03,507 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:39:03,508 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:39:03,508 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:39:03,509 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:39:03,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:39:03,510 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:39:03,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:39:03,511 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:39:03,511 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:39:03,512 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:39:03,512 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:39:03,513 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:39:03,513 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:39:03,513 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:39:03,514 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:39:03,514 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:39:03,515 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:39:03,515 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:39:03,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:39:03,530 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:39:03,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:39:03,531 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:39:03,531 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:39:03,531 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:39:03,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:39:03,532 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:39:03,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:39:03,533 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:39:03,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:39:03,535 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_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2024-11-08 18:39:03,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:39:03,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:39:03,933 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:39:03,935 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:39:03,936 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:39:03,937 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i Unable to find full path for "g++" [2024-11-08 18:39:06,180 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:39:06,541 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:39:06,541 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2024-11-08 18:39:06,568 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/data/61af463a2/dbfa9d792fd34327b2a2311dd541d95a/FLAG06fa3e880 [2024-11-08 18:39:06,784 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/data/61af463a2/dbfa9d792fd34327b2a2311dd541d95a [2024-11-08 18:39:06,787 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:39:06,789 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:39:06,791 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:39:06,791 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:39:06,798 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:39:06,799 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:39:06" (1/1) ... [2024-11-08 18:39:06,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17b0a44e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:06, skipping insertion in model container [2024-11-08 18:39:06,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:39:06" (1/1) ... [2024-11-08 18:39:06,866 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:39:07,702 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:39:07,775 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:39:07,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:39:07,929 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:39:07,929 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07 WrapperNode [2024-11-08 18:39:07,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:39:07,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:39:07,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:39:07,932 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:39:07,941 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:07,962 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,034 INFO L138 Inliner]: procedures = 271, calls = 110, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 266 [2024-11-08 18:39:08,038 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:39:08,039 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:39:08,039 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:39:08,039 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:39:08,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,064 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,071 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,119 INFO L175 MemorySlicer]: Split 79 memory accesses to 4 slices as follows [2, 5, 70, 2]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 60, 0]. The 5 writes are split as follows [0, 0, 4, 1]. [2024-11-08 18:39:08,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,148 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,162 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,168 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,174 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:39:08,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:39:08,182 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:39:08,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:39:08,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (1/1) ... [2024-11-08 18:39:08,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:39:08,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:39:08,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:39:08,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:39:08,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-08 18:39:08,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 18:39:08,287 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-08 18:39:08,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:39:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:39:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-08 18:39:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-08 18:39:08,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:39:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:39:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-08 18:39:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-08 18:39:08,290 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-08 18:39:08,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:39:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-08 18:39:08,294 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-08 18:39:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:39:08,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:39:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-08 18:39:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-08 18:39:08,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:39:08,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:39:08,297 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 18:39:08,488 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:39:08,492 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:39:09,145 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:39:09,145 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:39:09,881 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:39:09,882 INFO L316 CfgBuilder]: Removed 20 assume(true) statements. [2024-11-08 18:39:09,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:39:09 BoogieIcfgContainer [2024-11-08 18:39:09,883 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:39:09,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:39:09,889 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:39:09,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:39:09,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:39:06" (1/3) ... [2024-11-08 18:39:09,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a54ff42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:39:09, skipping insertion in model container [2024-11-08 18:39:09,895 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:39:07" (2/3) ... [2024-11-08 18:39:09,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a54ff42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:39:09, skipping insertion in model container [2024-11-08 18:39:09,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:39:09" (3/3) ... [2024-11-08 18:39:09,898 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2024-11-08 18:39:09,921 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:39:09,922 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2024-11-08 18:39:09,922 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:39:10,021 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-08 18:39:10,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 146 transitions, 299 flow [2024-11-08 18:39:10,210 INFO L124 PetriNetUnfolderBase]: 46/222 cut-off events. [2024-11-08 18:39:10,210 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-08 18:39:10,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 222 events. 46/222 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1094 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2024-11-08 18:39:10,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 146 transitions, 299 flow [2024-11-08 18:39:10,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 146 transitions, 299 flow [2024-11-08 18:39:10,253 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:39:10,261 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;@1ca62e47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:39:10,262 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-08 18:39:10,273 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:39:10,274 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-11-08 18:39:10,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:39:10,274 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:10,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:39:10,276 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 18:39:10,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:10,283 INFO L85 PathProgramCache]: Analyzing trace with hash 98579370, now seen corresponding path program 1 times [2024-11-08 18:39:10,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:10,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545202418] [2024-11-08 18:39:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:10,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:10,772 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 18:39:10,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:10,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545202418] [2024-11-08 18:39:10,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545202418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:10,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:39:10,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:39:10,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439566185] [2024-11-08 18:39:10,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:10,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:39:10,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:39:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:39:10,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 146 [2024-11-08 18:39:10,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:39:10,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:10,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 146 [2024-11-08 18:39:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:11,506 INFO L124 PetriNetUnfolderBase]: 556/1924 cut-off events. [2024-11-08 18:39:11,506 INFO L125 PetriNetUnfolderBase]: For 4/5 co-relation queries the response was YES. [2024-11-08 18:39:11,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2986 conditions, 1924 events. 556/1924 cut-off events. For 4/5 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 15042 event pairs, 483 based on Foata normal form. 381/2025 useless extension candidates. Maximal degree in co-relation 2873. Up to 1056 conditions per place. [2024-11-08 18:39:11,533 INFO L140 encePairwiseOnDemand]: 118/146 looper letters, 51 selfloop transitions, 2 changer transitions 0/121 dead transitions. [2024-11-08 18:39:11,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 355 flow [2024-11-08 18:39:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:39:11,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:39:11,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2024-11-08 18:39:11,553 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6461187214611872 [2024-11-08 18:39:11,556 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 299 flow. Second operand 3 states and 283 transitions. [2024-11-08 18:39:11,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 355 flow [2024-11-08 18:39:11,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 121 transitions, 355 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:39:11,569 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 261 flow [2024-11-08 18:39:11,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-11-08 18:39:11,577 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 1 predicate places. [2024-11-08 18:39:11,580 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 261 flow [2024-11-08 18:39:11,580 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:39:11,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:11,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:11,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:39:11,582 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 18:39:11,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash -392584109, now seen corresponding path program 1 times [2024-11-08 18:39:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070286382] [2024-11-08 18:39:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:11,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:39:11,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:11,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070286382] [2024-11-08 18:39:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070286382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:39:11,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370551791] [2024-11-08 18:39:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:11,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:11,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:39:11,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:39:11,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:39:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:11,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 18:39:11,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:39:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:39:12,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:39:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:39:12,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370551791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:39:12,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:39:12,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 18:39:12,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536371825] [2024-11-08 18:39:12,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:39:12,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:39:12,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:39:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:39:12,081 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 146 [2024-11-08 18:39:12,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 261 flow. Second operand has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 18:39:12,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:12,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 146 [2024-11-08 18:39:12,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:12,701 INFO L124 PetriNetUnfolderBase]: 555/1928 cut-off events. [2024-11-08 18:39:12,702 INFO L125 PetriNetUnfolderBase]: For 5/6 co-relation queries the response was YES. [2024-11-08 18:39:12,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3005 conditions, 1928 events. 555/1928 cut-off events. For 5/6 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 15042 event pairs, 483 based on Foata normal form. 3/1652 useless extension candidates. Maximal degree in co-relation 2991. Up to 1054 conditions per place. [2024-11-08 18:39:12,717 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 53 selfloop transitions, 6 changer transitions 0/126 dead transitions. [2024-11-08 18:39:12,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 391 flow [2024-11-08 18:39:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:39:12,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:39:12,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 467 transitions. [2024-11-08 18:39:12,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5331050228310502 [2024-11-08 18:39:12,725 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 261 flow. Second operand 6 states and 467 transitions. [2024-11-08 18:39:12,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 391 flow [2024-11-08 18:39:12,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 126 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:39:12,731 INFO L231 Difference]: Finished difference. Result has 127 places, 123 transitions, 295 flow [2024-11-08 18:39:12,733 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=255, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=295, PETRI_PLACES=127, PETRI_TRANSITIONS=123} [2024-11-08 18:39:12,734 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 9 predicate places. [2024-11-08 18:39:12,735 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 123 transitions, 295 flow [2024-11-08 18:39:12,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 68.85714285714286) internal successors, (482), 7 states have internal predecessors, (482), 0 states have call successors, (0), 0 states 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 18:39:12,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:12,736 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:12,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 18:39:12,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-08 18:39:12,940 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 18:39:12,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash -294973234, now seen corresponding path program 2 times [2024-11-08 18:39:12,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:12,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005445841] [2024-11-08 18:39:12,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:12,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:12,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:13,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 18:39:13,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:13,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005445841] [2024-11-08 18:39:13,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005445841] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:13,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:39:13,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:39:13,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123902235] [2024-11-08 18:39:13,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:13,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:39:13,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:39:13,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:39:13,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2024-11-08 18:39:13,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 123 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 18:39:13,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:13,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2024-11-08 18:39:13,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:13,700 INFO L124 PetriNetUnfolderBase]: 599/1995 cut-off events. [2024-11-08 18:39:13,700 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-08 18:39:13,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1995 events. 599/1995 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15475 event pairs, 483 based on Foata normal form. 0/1752 useless extension candidates. Maximal degree in co-relation 3132. Up to 1050 conditions per place. [2024-11-08 18:39:13,716 INFO L140 encePairwiseOnDemand]: 142/146 looper letters, 74 selfloop transitions, 2 changer transitions 0/142 dead transitions. [2024-11-08 18:39:13,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 142 transitions, 485 flow [2024-11-08 18:39:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:39:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:39:13,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 273 transitions. [2024-11-08 18:39:13,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6232876712328768 [2024-11-08 18:39:13,719 INFO L175 Difference]: Start difference. First operand has 127 places, 123 transitions, 295 flow. Second operand 3 states and 273 transitions. [2024-11-08 18:39:13,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 142 transitions, 485 flow [2024-11-08 18:39:13,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 142 transitions, 477 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 18:39:13,725 INFO L231 Difference]: Finished difference. Result has 126 places, 121 transitions, 287 flow [2024-11-08 18:39:13,725 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=287, PETRI_PLACES=126, PETRI_TRANSITIONS=121} [2024-11-08 18:39:13,726 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 8 predicate places. [2024-11-08 18:39:13,727 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 121 transitions, 287 flow [2024-11-08 18:39:13,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 18:39:13,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:13,727 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:13,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:39:13,728 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 18:39:13,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:13,728 INFO L85 PathProgramCache]: Analyzing trace with hash -294973233, now seen corresponding path program 1 times [2024-11-08 18:39:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:13,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152197722] [2024-11-08 18:39:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:13,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:13,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 18:39:13,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:13,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152197722] [2024-11-08 18:39:13,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152197722] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:13,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:39:13,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:39:13,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753336069] [2024-11-08 18:39:13,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:13,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:39:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:13,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:39:13,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:39:13,987 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 146 [2024-11-08 18:39:13,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 121 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 18:39:13,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:13,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 146 [2024-11-08 18:39:13,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:14,457 INFO L124 PetriNetUnfolderBase]: 615/2005 cut-off events. [2024-11-08 18:39:14,457 INFO L125 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2024-11-08 18:39:14,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3234 conditions, 2005 events. 615/2005 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 15484 event pairs, 0 based on Foata normal form. 2/1748 useless extension candidates. Maximal degree in co-relation 3194. Up to 1150 conditions per place. [2024-11-08 18:39:14,475 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 77 selfloop transitions, 2 changer transitions 0/143 dead transitions. [2024-11-08 18:39:14,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 143 transitions, 489 flow [2024-11-08 18:39:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:39:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:39:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 277 transitions. [2024-11-08 18:39:14,477 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.632420091324201 [2024-11-08 18:39:14,478 INFO L175 Difference]: Start difference. First operand has 126 places, 121 transitions, 287 flow. Second operand 3 states and 277 transitions. [2024-11-08 18:39:14,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 143 transitions, 489 flow [2024-11-08 18:39:14,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 143 transitions, 485 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:39:14,487 INFO L231 Difference]: Finished difference. Result has 127 places, 121 transitions, 295 flow [2024-11-08 18:39:14,491 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=295, PETRI_PLACES=127, PETRI_TRANSITIONS=121} [2024-11-08 18:39:14,492 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 9 predicate places. [2024-11-08 18:39:14,492 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 121 transitions, 295 flow [2024-11-08 18:39:14,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.66666666666667) internal successors, (203), 3 states have internal predecessors, (203), 0 states have call successors, (0), 0 states 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 18:39:14,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:14,493 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:14,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 18:39:14,493 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 18:39:14,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:14,495 INFO L85 PathProgramCache]: Analyzing trace with hash 946830695, now seen corresponding path program 1 times [2024-11-08 18:39:14,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:14,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956384893] [2024-11-08 18:39:14,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:14,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 18:39:14,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:14,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956384893] [2024-11-08 18:39:14,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956384893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:39:14,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606952231] [2024-11-08 18:39:14,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:14,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:14,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:39:14,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:39:14,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:39:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:14,887 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:39:14,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:39:14,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 18:39:14,924 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:39:15,021 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 18:39:15,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606952231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:39:15,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:39:15,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-08 18:39:15,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443760107] [2024-11-08 18:39:15,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:39:15,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:39:15,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:15,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:39:15,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:39:15,045 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 146 [2024-11-08 18:39:15,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 121 transitions, 295 flow. Second operand has 13 states, 13 states have (on average 69.07692307692308) internal successors, (898), 13 states have internal predecessors, (898), 0 states have call successors, (0), 0 states 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 18:39:15,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:15,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 146 [2024-11-08 18:39:15,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:15,564 INFO L124 PetriNetUnfolderBase]: 555/1909 cut-off events. [2024-11-08 18:39:15,564 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-08 18:39:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3072 conditions, 1909 events. 555/1909 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 14669 event pairs, 483 based on Foata normal form. 6/1653 useless extension candidates. Maximal degree in co-relation 2978. Up to 1035 conditions per place. [2024-11-08 18:39:15,580 INFO L140 encePairwiseOnDemand]: 142/146 looper letters, 59 selfloop transitions, 12 changer transitions 0/136 dead transitions. [2024-11-08 18:39:15,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 136 transitions, 521 flow [2024-11-08 18:39:15,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:39:15,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:39:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 881 transitions. [2024-11-08 18:39:15,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5028538812785388 [2024-11-08 18:39:15,584 INFO L175 Difference]: Start difference. First operand has 127 places, 121 transitions, 295 flow. Second operand 12 states and 881 transitions. [2024-11-08 18:39:15,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 136 transitions, 521 flow [2024-11-08 18:39:15,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 136 transitions, 517 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:39:15,590 INFO L231 Difference]: Finished difference. Result has 143 places, 128 transitions, 387 flow [2024-11-08 18:39:15,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=387, PETRI_PLACES=143, PETRI_TRANSITIONS=128} [2024-11-08 18:39:15,591 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 25 predicate places. [2024-11-08 18:39:15,592 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 128 transitions, 387 flow [2024-11-08 18:39:15,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 69.07692307692308) internal successors, (898), 13 states have internal predecessors, (898), 0 states have call successors, (0), 0 states 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 18:39:15,593 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:15,593 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:15,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 18:39:15,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:15,794 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 18:39:15,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash -303513871, now seen corresponding path program 2 times [2024-11-08 18:39:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:15,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257525839] [2024-11-08 18:39:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:16,105 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:39:16,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:16,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257525839] [2024-11-08 18:39:16,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257525839] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:39:16,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431871842] [2024-11-08 18:39:16,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:39:16,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:16,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:39:16,111 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:39:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:39:16,277 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:39:16,278 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:39:16,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:39:16,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:39:16,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:39:16,454 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:39:16,455 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:39:16,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431871842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:16,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:39:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2024-11-08 18:39:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951706209] [2024-11-08 18:39:16,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:16,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:39:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:39:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:39:16,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 146 [2024-11-08 18:39:16,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 128 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 18:39:16,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:16,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 146 [2024-11-08 18:39:16,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:17,202 INFO L124 PetriNetUnfolderBase]: 595/1983 cut-off events. [2024-11-08 18:39:17,202 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-08 18:39:17,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3282 conditions, 1983 events. 595/1983 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 15280 event pairs, 6 based on Foata normal form. 44/1787 useless extension candidates. Maximal degree in co-relation 3167. Up to 962 conditions per place. [2024-11-08 18:39:17,219 INFO L140 encePairwiseOnDemand]: 140/146 looper letters, 123 selfloop transitions, 4 changer transitions 0/191 dead transitions. [2024-11-08 18:39:17,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 191 transitions, 763 flow [2024-11-08 18:39:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:39:17,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:39:17,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 445 transitions. [2024-11-08 18:39:17,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6095890410958904 [2024-11-08 18:39:17,222 INFO L175 Difference]: Start difference. First operand has 143 places, 128 transitions, 387 flow. Second operand 5 states and 445 transitions. [2024-11-08 18:39:17,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 191 transitions, 763 flow [2024-11-08 18:39:17,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 191 transitions, 757 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:39:17,231 INFO L231 Difference]: Finished difference. Result has 144 places, 127 transitions, 388 flow [2024-11-08 18:39:17,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=388, PETRI_PLACES=144, PETRI_TRANSITIONS=127} [2024-11-08 18:39:17,233 INFO L277 CegarLoopForPetriNet]: 118 programPoint places, 26 predicate places. [2024-11-08 18:39:17,233 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 127 transitions, 388 flow [2024-11-08 18:39:17,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 states have internal predecessors, (335), 0 states have call successors, (0), 0 states 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 18:39:17,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:17,234 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:17,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 18:39:17,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-08 18:39:17,440 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-08 18:39:17,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:17,441 INFO L85 PathProgramCache]: Analyzing trace with hash -818994614, now seen corresponding path program 1 times [2024-11-08 18:39:17,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:17,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306953678] [2024-11-08 18:39:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 18:39:17,500 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-08 18:39:17,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-08 18:39:17,572 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-08 18:39:17,572 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-08 18:39:17,574 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2024-11-08 18:39:17,576 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2024-11-08 18:39:17,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2024-11-08 18:39:17,577 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2024-11-08 18:39:17,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2024-11-08 18:39:17,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2024-11-08 18:39:17,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2024-11-08 18:39:17,578 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2024-11-08 18:39:17,579 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2024-11-08 18:39:17,579 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2024-11-08 18:39:17,579 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2024-11-08 18:39:17,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2024-11-08 18:39:17,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2024-11-08 18:39:17,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2024-11-08 18:39:17,580 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2024-11-08 18:39:17,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2024-11-08 18:39:17,581 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2024-11-08 18:39:17,584 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2024-11-08 18:39:17,585 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2024-11-08 18:39:17,585 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2024-11-08 18:39:17,585 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2024-11-08 18:39:17,585 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2024-11-08 18:39:17,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2024-11-08 18:39:17,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2024-11-08 18:39:17,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2024-11-08 18:39:17,586 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2024-11-08 18:39:17,587 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2024-11-08 18:39:17,587 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2024-11-08 18:39:17,587 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2024-11-08 18:39:17,587 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2024-11-08 18:39:17,591 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2024-11-08 18:39:17,592 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2024-11-08 18:39:17,592 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2024-11-08 18:39:17,592 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2024-11-08 18:39:17,592 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2024-11-08 18:39:17,593 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2024-11-08 18:39:17,593 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2024-11-08 18:39:17,593 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2024-11-08 18:39:17,593 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2024-11-08 18:39:17,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 18:39:17,594 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-08 18:39:17,601 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-08 18:39:17,602 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-08 18:39:17,678 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 18:39:17,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 207 transitions, 430 flow [2024-11-08 18:39:17,734 INFO L124 PetriNetUnfolderBase]: 77/374 cut-off events. [2024-11-08 18:39:17,734 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-08 18:39:17,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 374 events. 77/374 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2075 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 224. Up to 12 conditions per place. [2024-11-08 18:39:17,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 207 transitions, 430 flow [2024-11-08 18:39:17,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 167 places, 207 transitions, 430 flow [2024-11-08 18:39:17,748 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:39:17,748 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;@1ca62e47, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:39:17,749 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-08 18:39:17,753 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:39:17,753 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2024-11-08 18:39:17,753 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:39:17,753 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:17,754 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:39:17,754 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 18:39:17,754 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1927387466, now seen corresponding path program 1 times [2024-11-08 18:39:17,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:17,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097637649] [2024-11-08 18:39:17,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:17,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:17,824 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 18:39:17,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:17,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097637649] [2024-11-08 18:39:17,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097637649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:17,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:39:17,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:39:17,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779149143] [2024-11-08 18:39:17,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:17,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:39:17,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:17,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:39:17,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:39:17,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 207 [2024-11-08 18:39:17,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 207 transitions, 430 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 18:39:17,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:17,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 207 [2024-11-08 18:39:17,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:25,752 INFO L124 PetriNetUnfolderBase]: 24195/53553 cut-off events. [2024-11-08 18:39:25,752 INFO L125 PetriNetUnfolderBase]: For 155/185 co-relation queries the response was YES. [2024-11-08 18:39:25,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89127 conditions, 53553 events. 24195/53553 cut-off events. For 155/185 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 598132 event pairs, 22302 based on Foata normal form. 12859/60306 useless extension candidates. Maximal degree in co-relation 82002. Up to 35456 conditions per place. [2024-11-08 18:39:26,245 INFO L140 encePairwiseOnDemand]: 167/207 looper letters, 74 selfloop transitions, 2 changer transitions 0/169 dead transitions. [2024-11-08 18:39:26,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 169 transitions, 506 flow [2024-11-08 18:39:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:39:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:39:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2024-11-08 18:39:26,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6328502415458938 [2024-11-08 18:39:26,253 INFO L175 Difference]: Start difference. First operand has 167 places, 207 transitions, 430 flow. Second operand 3 states and 393 transitions. [2024-11-08 18:39:26,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 169 transitions, 506 flow [2024-11-08 18:39:26,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 169 transitions, 506 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:39:26,262 INFO L231 Difference]: Finished difference. Result has 167 places, 169 transitions, 366 flow [2024-11-08 18:39:26,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=366, PETRI_PLACES=167, PETRI_TRANSITIONS=169} [2024-11-08 18:39:26,265 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 0 predicate places. [2024-11-08 18:39:26,265 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 169 transitions, 366 flow [2024-11-08 18:39:26,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states 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 18:39:26,266 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:26,266 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:26,266 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:39:26,266 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 18:39:26,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash 450378707, now seen corresponding path program 1 times [2024-11-08 18:39:26,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:26,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030267633] [2024-11-08 18:39:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:26,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:26,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:39:26,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:26,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030267633] [2024-11-08 18:39:26,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030267633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:39:26,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596305304] [2024-11-08 18:39:26,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:26,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:26,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:39:26,368 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:39:26,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:39:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:26,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-08 18:39:26,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:39:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:39:26,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:39:26,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:39:26,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596305304] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:39:26,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:39:26,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 18:39:26,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826890819] [2024-11-08 18:39:26,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:39:26,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:39:26,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:26,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:39:26,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:39:26,585 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 207 [2024-11-08 18:39:26,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 169 transitions, 366 flow. Second operand has 7 states, 7 states have (on average 93.85714285714286) internal successors, (657), 7 states have internal predecessors, (657), 0 states have call successors, (0), 0 states 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 18:39:26,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:26,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 207 [2024-11-08 18:39:26,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:32,957 INFO L124 PetriNetUnfolderBase]: 24194/53557 cut-off events. [2024-11-08 18:39:32,958 INFO L125 PetriNetUnfolderBase]: For 155/185 co-relation queries the response was YES. [2024-11-08 18:39:33,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89146 conditions, 53557 events. 24194/53557 cut-off events. For 155/185 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 598177 event pairs, 22302 based on Foata normal form. 3/47455 useless extension candidates. Maximal degree in co-relation 89131. Up to 35454 conditions per place. [2024-11-08 18:39:33,391 INFO L140 encePairwiseOnDemand]: 202/207 looper letters, 76 selfloop transitions, 6 changer transitions 0/174 dead transitions. [2024-11-08 18:39:33,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 174 transitions, 542 flow [2024-11-08 18:39:33,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:39:33,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:39:33,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 640 transitions. [2024-11-08 18:39:33,395 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5152979066022544 [2024-11-08 18:39:33,396 INFO L175 Difference]: Start difference. First operand has 167 places, 169 transitions, 366 flow. Second operand 6 states and 640 transitions. [2024-11-08 18:39:33,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 174 transitions, 542 flow [2024-11-08 18:39:33,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 174 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:39:33,405 INFO L231 Difference]: Finished difference. Result has 175 places, 171 transitions, 400 flow [2024-11-08 18:39:33,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=400, PETRI_PLACES=175, PETRI_TRANSITIONS=171} [2024-11-08 18:39:33,408 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 8 predicate places. [2024-11-08 18:39:33,409 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 171 transitions, 400 flow [2024-11-08 18:39:33,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 93.85714285714286) internal successors, (657), 7 states have internal predecessors, (657), 0 states have call successors, (0), 0 states 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 18:39:33,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:33,412 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:33,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 18:39:33,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:33,616 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 18:39:33,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1489277458, now seen corresponding path program 2 times [2024-11-08 18:39:33,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:33,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541712383] [2024-11-08 18:39:33,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:33,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 18:39:33,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:33,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541712383] [2024-11-08 18:39:33,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541712383] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:33,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:39:33,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:39:33,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823016794] [2024-11-08 18:39:33,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:33,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:39:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:39:33,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:39:33,777 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 207 [2024-11-08 18:39:33,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 171 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 18:39:33,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:33,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 207 [2024-11-08 18:39:33,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:39,441 INFO L124 PetriNetUnfolderBase]: 26161/56767 cut-off events. [2024-11-08 18:39:39,442 INFO L125 PetriNetUnfolderBase]: For 141/141 co-relation queries the response was YES. [2024-11-08 18:39:39,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95338 conditions, 56767 events. 26161/56767 cut-off events. For 141/141 co-relation queries the response was YES. Maximal size of possible extension queue 1669. Compared 628380 event pairs, 22281 based on Foata normal form. 0/50899 useless extension candidates. Maximal degree in co-relation 95294. Up to 35375 conditions per place. [2024-11-08 18:39:39,825 INFO L140 encePairwiseOnDemand]: 203/207 looper letters, 118 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2024-11-08 18:39:39,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 211 transitions, 720 flow [2024-11-08 18:39:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:39:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:39:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 392 transitions. [2024-11-08 18:39:39,828 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6312399355877617 [2024-11-08 18:39:39,828 INFO L175 Difference]: Start difference. First operand has 175 places, 171 transitions, 400 flow. Second operand 3 states and 392 transitions. [2024-11-08 18:39:39,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 211 transitions, 720 flow [2024-11-08 18:39:39,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 211 transitions, 712 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-08 18:39:39,832 INFO L231 Difference]: Finished difference. Result has 174 places, 169 transitions, 392 flow [2024-11-08 18:39:39,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=174, PETRI_TRANSITIONS=169} [2024-11-08 18:39:39,832 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 7 predicate places. [2024-11-08 18:39:39,833 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 169 transitions, 392 flow [2024-11-08 18:39:39,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 18:39:39,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:39,833 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:39,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 18:39:39,834 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 18:39:39,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1489277457, now seen corresponding path program 1 times [2024-11-08 18:39:39,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:39,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776006015] [2024-11-08 18:39:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:39,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-08 18:39:39,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:39,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776006015] [2024-11-08 18:39:39,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776006015] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:39,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:39:39,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:39:39,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034754275] [2024-11-08 18:39:39,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:39,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:39:39,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:39,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:39:39,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:39:40,016 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 207 [2024-11-08 18:39:40,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 169 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 18:39:40,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:40,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 207 [2024-11-08 18:39:40,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:46,043 INFO L124 PetriNetUnfolderBase]: 27836/61480 cut-off events. [2024-11-08 18:39:46,043 INFO L125 PetriNetUnfolderBase]: For 786/812 co-relation queries the response was YES. [2024-11-08 18:39:46,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102456 conditions, 61480 events. 27836/61480 cut-off events. For 786/812 co-relation queries the response was YES. Maximal size of possible extension queue 1692. Compared 688320 event pairs, 20776 based on Foata normal form. 2/54106 useless extension candidates. Maximal degree in co-relation 102415. Up to 40279 conditions per place. [2024-11-08 18:39:46,415 INFO L140 encePairwiseOnDemand]: 202/207 looper letters, 101 selfloop transitions, 2 changer transitions 0/192 dead transitions. [2024-11-08 18:39:46,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 192 transitions, 644 flow [2024-11-08 18:39:46,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:39:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:39:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 376 transitions. [2024-11-08 18:39:46,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.605475040257649 [2024-11-08 18:39:46,418 INFO L175 Difference]: Start difference. First operand has 174 places, 169 transitions, 392 flow. Second operand 3 states and 376 transitions. [2024-11-08 18:39:46,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 192 transitions, 644 flow [2024-11-08 18:39:46,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 192 transitions, 640 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:39:46,505 INFO L231 Difference]: Finished difference. Result has 175 places, 170 transitions, 404 flow [2024-11-08 18:39:46,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=175, PETRI_TRANSITIONS=170} [2024-11-08 18:39:46,506 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 8 predicate places. [2024-11-08 18:39:46,506 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 170 transitions, 404 flow [2024-11-08 18:39:46,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states 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 18:39:46,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:46,507 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:46,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 18:39:46,507 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 18:39:46,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:46,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2045901841, now seen corresponding path program 1 times [2024-11-08 18:39:46,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:46,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002704535] [2024-11-08 18:39:46,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:46,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 18:39:46,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:46,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002704535] [2024-11-08 18:39:46,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002704535] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:39:46,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366609109] [2024-11-08 18:39:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:46,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:46,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:39:46,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:39:46,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:39:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:46,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 18:39:46,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:39:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 18:39:46,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:39:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 18:39:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366609109] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:39:46,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:39:46,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-08 18:39:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029225040] [2024-11-08 18:39:46,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:39:46,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:39:46,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:39:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:39:46,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 207 [2024-11-08 18:39:46,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 170 transitions, 404 flow. Second operand has 13 states, 13 states have (on average 94.07692307692308) internal successors, (1223), 13 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states 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 18:39:46,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:46,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 207 [2024-11-08 18:39:46,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:39:52,531 INFO L124 PetriNetUnfolderBase]: 24379/54687 cut-off events. [2024-11-08 18:39:52,532 INFO L125 PetriNetUnfolderBase]: For 774/800 co-relation queries the response was YES. [2024-11-08 18:39:52,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90864 conditions, 54687 events. 24379/54687 cut-off events. For 774/800 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 615232 event pairs, 22302 based on Foata normal form. 6/48277 useless extension candidates. Maximal degree in co-relation 90769. Up to 35402 conditions per place. [2024-11-08 18:39:53,095 INFO L140 encePairwiseOnDemand]: 203/207 looper letters, 83 selfloop transitions, 12 changer transitions 0/185 dead transitions. [2024-11-08 18:39:53,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 185 transitions, 678 flow [2024-11-08 18:39:53,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 18:39:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 18:39:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1204 transitions. [2024-11-08 18:39:53,100 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48470209339774556 [2024-11-08 18:39:53,100 INFO L175 Difference]: Start difference. First operand has 175 places, 170 transitions, 404 flow. Second operand 12 states and 1204 transitions. [2024-11-08 18:39:53,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 185 transitions, 678 flow [2024-11-08 18:39:53,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 185 transitions, 676 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:39:53,106 INFO L231 Difference]: Finished difference. Result has 192 places, 177 transitions, 498 flow [2024-11-08 18:39:53,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=498, PETRI_PLACES=192, PETRI_TRANSITIONS=177} [2024-11-08 18:39:53,107 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 25 predicate places. [2024-11-08 18:39:53,107 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 177 transitions, 498 flow [2024-11-08 18:39:53,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 94.07692307692308) internal successors, (1223), 13 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states 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 18:39:53,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:39:53,108 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:39:53,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 18:39:53,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:53,308 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 18:39:53,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:39:53,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2092834213, now seen corresponding path program 2 times [2024-11-08 18:39:53,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:39:53,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005926926] [2024-11-08 18:39:53,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:39:53,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:39:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:39:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:39:53,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:39:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005926926] [2024-11-08 18:39:53,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005926926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:39:53,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480146584] [2024-11-08 18:39:53,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 18:39:53,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:39:53,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:39:53,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:39:53,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:39:53,781 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 18:39:53,782 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 18:39:53,784 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 18:39:53,785 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:39:53,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:39:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:39:53,907 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:39:53,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480146584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:39:53,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:39:53,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-08 18:39:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728870501] [2024-11-08 18:39:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:39:53,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:39:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:39:53,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:39:53,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-08 18:39:54,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 207 [2024-11-08 18:39:54,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 177 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 18:39:54,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:39:54,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 207 [2024-11-08 18:39:54,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:40:00,379 INFO L124 PetriNetUnfolderBase]: 26700/59170 cut-off events. [2024-11-08 18:40:00,380 INFO L125 PetriNetUnfolderBase]: For 2071/2071 co-relation queries the response was YES. [2024-11-08 18:40:00,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99717 conditions, 59170 events. 26700/59170 cut-off events. For 2071/2071 co-relation queries the response was YES. Maximal size of possible extension queue 1723. Compared 671888 event pairs, 1510 based on Foata normal form. 1012/53679 useless extension candidates. Maximal degree in co-relation 99601. Up to 32511 conditions per place. [2024-11-08 18:40:00,886 INFO L140 encePairwiseOnDemand]: 201/207 looper letters, 188 selfloop transitions, 5 changer transitions 0/282 dead transitions. [2024-11-08 18:40:00,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 282 transitions, 1090 flow [2024-11-08 18:40:00,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:40:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:40:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 636 transitions. [2024-11-08 18:40:00,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144927536231884 [2024-11-08 18:40:00,889 INFO L175 Difference]: Start difference. First operand has 192 places, 177 transitions, 498 flow. Second operand 5 states and 636 transitions. [2024-11-08 18:40:00,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 282 transitions, 1090 flow [2024-11-08 18:40:00,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 282 transitions, 1084 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:40:00,896 INFO L231 Difference]: Finished difference. Result has 193 places, 176 transitions, 502 flow [2024-11-08 18:40:00,897 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=207, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=502, PETRI_PLACES=193, PETRI_TRANSITIONS=176} [2024-11-08 18:40:00,898 INFO L277 CegarLoopForPetriNet]: 167 programPoint places, 26 predicate places. [2024-11-08 18:40:00,898 INFO L471 AbstractCegarLoop]: Abstraction has has 193 places, 176 transitions, 502 flow [2024-11-08 18:40:00,898 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 0 states have call successors, (0), 0 states 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 18:40:00,898 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:40:00,899 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:40:00,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:40:01,099 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_893c44ad-55cc-4557-b7ee-a1ffab25a8ef/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:40:01,100 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-08 18:40:01,100 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:40:01,100 INFO L85 PathProgramCache]: Analyzing trace with hash -884724434, now seen corresponding path program 1 times [2024-11-08 18:40:01,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:40:01,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924747597] [2024-11-08 18:40:01,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:40:01,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:40:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:40:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-11-08 18:40:01,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:40:01,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924747597] [2024-11-08 18:40:01,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924747597] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:40:01,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:40:01,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:40:01,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26666382] [2024-11-08 18:40:01,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:40:01,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:40:01,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:40:01,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:40:01,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-11-08 18:40:02,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 207 [2024-11-08 18:40:02,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 176 transitions, 502 flow. Second operand has 7 states, 7 states have (on average 74.85714285714286) internal successors, (524), 7 states have internal predecessors, (524), 0 states have call successors, (0), 0 states 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 18:40:02,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:40:02,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 207 [2024-11-08 18:40:02,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand