./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU --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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:14:38,343 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:14:38,439 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:14:38,447 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:14:38,447 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:14:38,491 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:14:38,494 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:14:38,494 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:14:38,495 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:14:38,496 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:14:38,499 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:14:38,499 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:14:38,500 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:14:38,501 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:14:38,505 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:14:38,505 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:14:38,506 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:14:38,506 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:14:38,507 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:14:38,507 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:14:38,507 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:14:38,510 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:14:38,511 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:14:38,511 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:14:38,511 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:14:38,512 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:14:38,512 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:14:38,512 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:14:38,513 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:14:38,513 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:14:38,514 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:14:38,514 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:14:38,514 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:14:38,514 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:38,515 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:14:38,515 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:14:38,515 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:14:38,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:14:38,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:14:38,516 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:14:38,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:14:38,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:14:38,517 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_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-10-31 22:14:38,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:14:38,926 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:14:38,929 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:14:38,930 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:14:38,931 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:14:38,932 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c Unable to find full path for "g++" [2024-10-31 22:14:41,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:14:41,467 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:14:41,467 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-10-31 22:14:41,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/data/62b327769/cc57f2953183410db184f9f3d2fbb9a8/FLAGeddcc57bd [2024-10-31 22:14:41,495 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/data/62b327769/cc57f2953183410db184f9f3d2fbb9a8 [2024-10-31 22:14:41,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:14:41,499 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:14:41,500 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:41,501 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:14:41,506 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:14:41,507 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:41,508 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333ea5c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41, skipping insertion in model container [2024-10-31 22:14:41,508 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:41,538 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:14:41,861 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:14:41,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:41,876 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:14:41,921 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:41,945 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:14:41,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41 WrapperNode [2024-10-31 22:14:41,946 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:41,947 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:41,947 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:14:41,948 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:14:41,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:41,967 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,005 INFO L138 Inliner]: procedures = 24, calls = 47, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 314 [2024-10-31 22:14:42,005 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:42,006 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:14:42,006 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:14:42,006 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:14:42,019 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,023 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,051 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-31 22:14:42,052 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,052 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,062 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,068 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,070 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,072 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,075 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:14:42,080 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:14:42,081 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:14:42,081 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:14:42,082 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (1/1) ... [2024-10-31 22:14:42,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:42,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:42,126 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:14:42,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:14:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:14:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:14:42,169 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:14:42,169 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:14:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:14:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:14:42,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:14:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:14:42,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:14:42,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:14:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:14:42,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:14:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:14:42,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:14:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:14:42,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:14:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:14:42,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:14:42,177 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:14:42,321 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:14:42,324 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:42,965 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:14:42,966 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:43,510 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:43,511 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-31 22:14:43,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:43 BoogieIcfgContainer [2024-10-31 22:14:43,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:43,515 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:43,515 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:43,520 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:43,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:14:41" (1/3) ... [2024-10-31 22:14:43,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7437d21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:43, skipping insertion in model container [2024-10-31 22:14:43,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:41" (2/3) ... [2024-10-31 22:14:43,524 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7437d21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:43, skipping insertion in model container [2024-10-31 22:14:43,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:43" (3/3) ... [2024-10-31 22:14:43,526 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-10-31 22:14:43,548 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:43,549 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-31 22:14:43,549 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:14:43,640 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:14:43,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 167 flow [2024-10-31 22:14:43,741 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2024-10-31 22:14:43,741 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:14:43,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 70 events. 8/70 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 179 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-10-31 22:14:43,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 167 flow [2024-10-31 22:14:43,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 156 flow [2024-10-31 22:14:43,766 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:43,776 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;@75834815, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:43,776 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-10-31 22:14:43,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:14:43,780 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:14:43,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:14:43,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:43,782 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:14:43,782 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:43,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash 944471, now seen corresponding path program 1 times [2024-10-31 22:14:43,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:43,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004433426] [2024-10-31 22:14:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:43,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:44,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:44,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004433426] [2024-10-31 22:14:44,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004433426] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:44,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:44,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:14:44,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261720866] [2024-10-31 22:14:44,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:44,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:44,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:44,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:44,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:14:44,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-31 22:14:44,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:44,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:14:44,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:45,902 INFO L124 PetriNetUnfolderBase]: 5811/9209 cut-off events. [2024-10-31 22:14:45,903 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-10-31 22:14:45,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17453 conditions, 9209 events. 5811/9209 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63097 event pairs, 5236 based on Foata normal form. 514/6076 useless extension candidates. Maximal degree in co-relation 16841. Up to 7878 conditions per place. [2024-10-31 22:14:45,988 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2024-10-31 22:14:45,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 240 flow [2024-10-31 22:14:45,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-10-31 22:14:46,003 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2024-10-31 22:14:46,006 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 156 flow. Second operand 3 states and 106 transitions. [2024-10-31 22:14:46,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 240 flow [2024-10-31 22:14:46,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 228 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:14:46,021 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2024-10-31 22:14:46,023 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-10-31 22:14:46,027 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2024-10-31 22:14:46,027 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2024-10-31 22:14:46,028 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2024-10-31 22:14:46,028 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:46,028 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:14:46,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:46,028 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:46,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 944472, now seen corresponding path program 1 times [2024-10-31 22:14:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760638122] [2024-10-31 22:14:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760638122] [2024-10-31 22:14:46,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760638122] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:46,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:46,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:46,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984700394] [2024-10-31 22:14:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:46,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:46,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:46,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:46,492 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:14:46,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-10-31 22:14:46,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:46,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:14:46,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:47,850 INFO L124 PetriNetUnfolderBase]: 5812/9212 cut-off events. [2024-10-31 22:14:47,851 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-10-31 22:14:47,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17240 conditions, 9212 events. 5812/9212 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63115 event pairs, 5236 based on Foata normal form. 0/5562 useless extension candidates. Maximal degree in co-relation 17203. Up to 7891 conditions per place. [2024-10-31 22:14:47,924 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-10-31 22:14:47,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 250 flow [2024-10-31 22:14:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:47,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:47,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-10-31 22:14:47,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2024-10-31 22:14:47,929 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 4 states and 124 transitions. [2024-10-31 22:14:47,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 250 flow [2024-10-31 22:14:47,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:47,933 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 157 flow [2024-10-31 22:14:47,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-10-31 22:14:47,934 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2024-10-31 22:14:47,935 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 157 flow [2024-10-31 22:14:47,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2024-10-31 22:14:47,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:47,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:14:47,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:47,936 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:47,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:47,937 INFO L85 PathProgramCache]: Analyzing trace with hash 29280847, now seen corresponding path program 1 times [2024-10-31 22:14:47,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:47,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663996250] [2024-10-31 22:14:47,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:47,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:48,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:48,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663996250] [2024-10-31 22:14:48,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663996250] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:48,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:48,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:48,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713945904] [2024-10-31 22:14:48,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:48,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:48,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:48,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:48,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:48,211 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:14:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-10-31 22:14:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:48,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:14:48,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:49,747 INFO L124 PetriNetUnfolderBase]: 5813/9215 cut-off events. [2024-10-31 22:14:49,748 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-10-31 22:14:49,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17257 conditions, 9215 events. 5813/9215 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63116 event pairs, 5236 based on Foata normal form. 0/5564 useless extension candidates. Maximal degree in co-relation 17232. Up to 7890 conditions per place. [2024-10-31 22:14:49,815 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 51 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-10-31 22:14:49,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 279 flow [2024-10-31 22:14:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:49,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:49,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-10-31 22:14:49,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39452054794520547 [2024-10-31 22:14:49,822 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 157 flow. Second operand 5 states and 144 transitions. [2024-10-31 22:14:49,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 279 flow [2024-10-31 22:14:49,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:49,827 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 191 flow [2024-10-31 22:14:49,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-10-31 22:14:49,828 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-10-31 22:14:49,830 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 191 flow [2024-10-31 22:14:49,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-10-31 22:14:49,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:49,831 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:14:49,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:14:49,832 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:49,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:49,833 INFO L85 PathProgramCache]: Analyzing trace with hash 907668153, now seen corresponding path program 1 times [2024-10-31 22:14:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:49,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568565515] [2024-10-31 22:14:49,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:49,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:49,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:50,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568565515] [2024-10-31 22:14:50,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568565515] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:50,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075079483] [2024-10-31 22:14:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:50,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:50,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:50,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:50,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:50,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,302 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-31 22:14:50,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:50,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-10-31 22:14:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,654 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075079483] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:50,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:50,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:14:50,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824138344] [2024-10-31 22:14:50,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:50,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:14:50,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:50,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:14:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:14:50,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:14:50,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 191 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2024-10-31 22:14:50,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:50,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:14:50,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:52,594 INFO L124 PetriNetUnfolderBase]: 5814/9217 cut-off events. [2024-10-31 22:14:52,594 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-10-31 22:14:52,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17280 conditions, 9217 events. 5814/9217 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63148 event pairs, 5236 based on Foata normal form. 0/5569 useless extension candidates. Maximal degree in co-relation 17242. Up to 7891 conditions per place. [2024-10-31 22:14:52,668 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 50 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-10-31 22:14:52,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 322 flow [2024-10-31 22:14:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:14:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:14:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-10-31 22:14:52,671 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3339041095890411 [2024-10-31 22:14:52,672 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 191 flow. Second operand 8 states and 195 transitions. [2024-10-31 22:14:52,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 322 flow [2024-10-31 22:14:52,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:52,676 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 221 flow [2024-10-31 22:14:52,676 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=221, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-10-31 22:14:52,677 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-10-31 22:14:52,677 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 221 flow [2024-10-31 22:14:52,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2024-10-31 22:14:52,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:52,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:14:52,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:52,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:52,884 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:52,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:52,884 INFO L85 PathProgramCache]: Analyzing trace with hash 907707653, now seen corresponding path program 1 times [2024-10-31 22:14:52,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:52,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475951448] [2024-10-31 22:14:52,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:52,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:52,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:53,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:53,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475951448] [2024-10-31 22:14:53,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475951448] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:53,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:53,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:53,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147216229] [2024-10-31 22:14:53,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:53,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:53,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:53,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:53,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:14:53,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2024-10-31 22:14:53,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:53,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:14:53,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:54,614 INFO L124 PetriNetUnfolderBase]: 5815/9220 cut-off events. [2024-10-31 22:14:54,614 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-10-31 22:14:54,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 9220 events. 5815/9220 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63161 event pairs, 5236 based on Foata normal form. 0/5571 useless extension candidates. Maximal degree in co-relation 17250. Up to 7895 conditions per place. [2024-10-31 22:14:54,690 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 54 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2024-10-31 22:14:54,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 353 flow [2024-10-31 22:14:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:54,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:54,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-31 22:14:54,693 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3917808219178082 [2024-10-31 22:14:54,693 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 221 flow. Second operand 5 states and 143 transitions. [2024-10-31 22:14:54,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 353 flow [2024-10-31 22:14:54,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 306 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-10-31 22:14:54,699 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 217 flow [2024-10-31 22:14:54,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-10-31 22:14:54,700 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-10-31 22:14:54,700 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 217 flow [2024-10-31 22:14:54,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2024-10-31 22:14:54,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:54,700 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-10-31 22:14:54,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:14:54,701 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:54,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1925847176, now seen corresponding path program 1 times [2024-10-31 22:14:54,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:54,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144476777] [2024-10-31 22:14:54,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:54,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:54,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:54,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144476777] [2024-10-31 22:14:54,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144476777] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:54,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264173393] [2024-10-31 22:14:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:54,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:54,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:54,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:54,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:55,061 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:14:55,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:55,091 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 [2024-10-31 22:14:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:55,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:55,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264173393] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:55,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:55,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:14:55,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390947480] [2024-10-31 22:14:55,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:55,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:14:55,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:55,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:14:55,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:55,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:14:55,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2024-10-31 22:14:55,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:55,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:14:55,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:56,828 INFO L124 PetriNetUnfolderBase]: 5815/9219 cut-off events. [2024-10-31 22:14:56,828 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-10-31 22:14:56,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17288 conditions, 9219 events. 5815/9219 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 63136 event pairs, 5236 based on Foata normal form. 0/5573 useless extension candidates. Maximal degree in co-relation 17239. Up to 7885 conditions per place. [2024-10-31 22:14:56,887 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-10-31 22:14:56,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 337 flow [2024-10-31 22:14:56,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:14:56,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-10-31 22:14:56,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34442270058708413 [2024-10-31 22:14:56,889 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 217 flow. Second operand 7 states and 176 transitions. [2024-10-31 22:14:56,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 337 flow [2024-10-31 22:14:56,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:56,891 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 236 flow [2024-10-31 22:14:56,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2024-10-31 22:14:56,892 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-10-31 22:14:56,893 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 236 flow [2024-10-31 22:14:56,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2024-10-31 22:14:56,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:56,893 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-31 22:14:56,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:14:57,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:57,094 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:57,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:57,095 INFO L85 PathProgramCache]: Analyzing trace with hash 428724105, now seen corresponding path program 1 times [2024-10-31 22:14:57,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:57,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300258333] [2024-10-31 22:14:57,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:57,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:57,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:57,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300258333] [2024-10-31 22:14:57,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300258333] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:57,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446749806] [2024-10-31 22:14:57,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:57,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:57,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:57,486 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:57,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:57,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:14:57,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:57,639 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 [2024-10-31 22:14:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:57,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:58,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446749806] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:58,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:58,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-10-31 22:14:58,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019296878] [2024-10-31 22:14:58,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:58,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:14:58,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:58,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:14:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:14:58,170 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:14:58,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 236 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2024-10-31 22:14:58,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:58,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:14:58,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:59,573 INFO L124 PetriNetUnfolderBase]: 5815/9218 cut-off events. [2024-10-31 22:14:59,573 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-10-31 22:14:59,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 9218 events. 5815/9218 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 63189 event pairs, 5236 based on Foata normal form. 0/5573 useless extension candidates. Maximal degree in co-relation 17241. Up to 7885 conditions per place. [2024-10-31 22:14:59,636 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 43 selfloop transitions, 18 changer transitions 0/71 dead transitions. [2024-10-31 22:14:59,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 71 transitions, 354 flow [2024-10-31 22:14:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:14:59,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-10-31 22:14:59,637 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3424657534246575 [2024-10-31 22:14:59,638 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 236 flow. Second operand 7 states and 175 transitions. [2024-10-31 22:14:59,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 71 transitions, 354 flow [2024-10-31 22:14:59,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 327 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-10-31 22:14:59,640 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 241 flow [2024-10-31 22:14:59,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-10-31 22:14:59,642 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-10-31 22:14:59,642 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 241 flow [2024-10-31 22:14:59,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2024-10-31 22:14:59,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:59,643 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:59,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:14:59,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:59,851 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:14:59,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:59,852 INFO L85 PathProgramCache]: Analyzing trace with hash 409480633, now seen corresponding path program 1 times [2024-10-31 22:14:59,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:59,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129889843] [2024-10-31 22:14:59,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:59,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:00,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:00,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129889843] [2024-10-31 22:15:00,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129889843] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:00,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:00,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:00,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585354862] [2024-10-31 22:15:00,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:00,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:00,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:00,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-31 22:15:00,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:00,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:00,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-31 22:15:00,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:01,250 INFO L124 PetriNetUnfolderBase]: 6017/9598 cut-off events. [2024-10-31 22:15:01,251 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-10-31 22:15:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18037 conditions, 9598 events. 6017/9598 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 65354 event pairs, 5423 based on Foata normal form. 140/6048 useless extension candidates. Maximal degree in co-relation 17253. Up to 7896 conditions per place. [2024-10-31 22:15:01,314 INFO L140 encePairwiseOnDemand]: 57/73 looper letters, 82 selfloop transitions, 7 changer transitions 1/100 dead transitions. [2024-10-31 22:15:01,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 528 flow [2024-10-31 22:15:01,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:01,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-10-31 22:15:01,317 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-10-31 22:15:01,317 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 241 flow. Second operand 5 states and 190 transitions. [2024-10-31 22:15:01,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 528 flow [2024-10-31 22:15:01,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 470 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-10-31 22:15:01,321 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 270 flow [2024-10-31 22:15:01,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-10-31 22:15:01,322 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-10-31 22:15:01,323 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 270 flow [2024-10-31 22:15:01,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:01,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:01,323 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:01,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:15:01,323 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:01,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1209310984, now seen corresponding path program 1 times [2024-10-31 22:15:01,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:01,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763125772] [2024-10-31 22:15:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:01,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:01,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:01,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:01,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763125772] [2024-10-31 22:15:01,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763125772] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:01,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979365237] [2024-10-31 22:15:01,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:01,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:01,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:01,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:01,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:01,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:15:01,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-10-31 22:15:01,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:01,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:15:01,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:02,198 INFO L124 PetriNetUnfolderBase]: 4591/7317 cut-off events. [2024-10-31 22:15:02,198 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-10-31 22:15:02,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14879 conditions, 7317 events. 4591/7317 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47248 event pairs, 4099 based on Foata normal form. 0/4764 useless extension candidates. Maximal degree in co-relation 14122. Up to 6256 conditions per place. [2024-10-31 22:15:02,243 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 55 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-10-31 22:15:02,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 382 flow [2024-10-31 22:15:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-10-31 22:15:02,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36712328767123287 [2024-10-31 22:15:02,245 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 270 flow. Second operand 5 states and 134 transitions. [2024-10-31 22:15:02,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 382 flow [2024-10-31 22:15:02,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:15:02,248 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 267 flow [2024-10-31 22:15:02,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-10-31 22:15:02,251 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-10-31 22:15:02,252 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 267 flow [2024-10-31 22:15:02,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2024-10-31 22:15:02,252 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:02,252 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:02,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:15:02,253 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:02,253 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:02,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1209310983, now seen corresponding path program 1 times [2024-10-31 22:15:02,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:02,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542867133] [2024-10-31 22:15:02,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:02,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:02,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542867133] [2024-10-31 22:15:02,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542867133] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817655695] [2024-10-31 22:15:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:02,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:02,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:02,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:02,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:15:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:02,720 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-10-31 22:15:02,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:02,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:15:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:02,792 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-31 22:15:02,821 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-10-31 22:15:02,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-10-31 22:15:02,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:02,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-31 22:15:02,859 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:02,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:15:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:02,887 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:15:02,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817655695] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:02,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:15:02,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-10-31 22:15:02,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243695194] [2024-10-31 22:15:02,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:02,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:15:02,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:02,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:15:02,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:15:02,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:15:02,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2024-10-31 22:15:02,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:02,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:15:02,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:03,567 INFO L124 PetriNetUnfolderBase]: 3361/5408 cut-off events. [2024-10-31 22:15:03,567 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2024-10-31 22:15:03,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10647 conditions, 5408 events. 3361/5408 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32670 event pairs, 2963 based on Foata normal form. 0/3834 useless extension candidates. Maximal degree in co-relation 9842. Up to 4610 conditions per place. [2024-10-31 22:15:03,637 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 55 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-10-31 22:15:03,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 373 flow [2024-10-31 22:15:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:03,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:15:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-10-31 22:15:03,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3904109589041096 [2024-10-31 22:15:03,639 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 267 flow. Second operand 4 states and 114 transitions. [2024-10-31 22:15:03,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 373 flow [2024-10-31 22:15:03,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:15:03,642 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 252 flow [2024-10-31 22:15:03,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-10-31 22:15:03,643 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2024-10-31 22:15:03,644 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 252 flow [2024-10-31 22:15:03,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2024-10-31 22:15:03,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:03,644 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:03,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:15:03,845 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:15:03,845 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:03,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:03,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1166066191, now seen corresponding path program 1 times [2024-10-31 22:15:03,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:03,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972744275] [2024-10-31 22:15:03,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:03,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:03,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:03,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972744275] [2024-10-31 22:15:03,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972744275] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:03,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:03,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:03,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419565679] [2024-10-31 22:15:03,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:03,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:03,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:03,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:03,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:03,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-31 22:15:03,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-31 22:15:03,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:03,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-31 22:15:03,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:04,793 INFO L124 PetriNetUnfolderBase]: 4121/6672 cut-off events. [2024-10-31 22:15:04,793 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2024-10-31 22:15:04,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13372 conditions, 6672 events. 4121/6672 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41789 event pairs, 1846 based on Foata normal form. 114/4805 useless extension candidates. Maximal degree in co-relation 12233. Up to 3446 conditions per place. [2024-10-31 22:15:04,825 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 77 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-10-31 22:15:04,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 458 flow [2024-10-31 22:15:04,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:04,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:15:04,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-10-31 22:15:04,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753424657534246 [2024-10-31 22:15:04,827 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 252 flow. Second operand 3 states and 126 transitions. [2024-10-31 22:15:04,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 458 flow [2024-10-31 22:15:04,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:15:04,831 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 263 flow [2024-10-31 22:15:04,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-10-31 22:15:04,832 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-10-31 22:15:04,832 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 263 flow [2024-10-31 22:15:04,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-10-31 22:15:04,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:04,832 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:04,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:15:04,833 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:04,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:04,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1326810422, now seen corresponding path program 1 times [2024-10-31 22:15:04,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:04,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373190512] [2024-10-31 22:15:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:04,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:04,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:04,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373190512] [2024-10-31 22:15:04,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373190512] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:04,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:04,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:15:04,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356771618] [2024-10-31 22:15:04,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:04,890 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:04,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:04,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:04,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:04,892 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-31 22:15:04,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-10-31 22:15:04,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:04,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-31 22:15:04,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:05,388 INFO L124 PetriNetUnfolderBase]: 3232/5161 cut-off events. [2024-10-31 22:15:05,388 INFO L125 PetriNetUnfolderBase]: For 791/791 co-relation queries the response was YES. [2024-10-31 22:15:05,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11077 conditions, 5161 events. 3232/5161 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30650 event pairs, 1349 based on Foata normal form. 71/3804 useless extension candidates. Maximal degree in co-relation 10777. Up to 4054 conditions per place. [2024-10-31 22:15:05,412 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 67 selfloop transitions, 2 changer transitions 5/84 dead transitions. [2024-10-31 22:15:05,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 447 flow [2024-10-31 22:15:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:15:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-10-31 22:15:05,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2024-10-31 22:15:05,414 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 263 flow. Second operand 3 states and 120 transitions. [2024-10-31 22:15:05,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 447 flow [2024-10-31 22:15:05,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:15:05,418 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 238 flow [2024-10-31 22:15:05,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2024-10-31 22:15:05,419 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-10-31 22:15:05,419 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 238 flow [2024-10-31 22:15:05,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 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) [2024-10-31 22:15:05,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:05,420 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:05,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:15:05,420 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:05,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:05,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1760590007, now seen corresponding path program 1 times [2024-10-31 22:15:05,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:05,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980248322] [2024-10-31 22:15:05,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:05,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:05,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:05,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:05,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:05,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980248322] [2024-10-31 22:15:05,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980248322] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:05,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:05,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:05,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781867049] [2024-10-31 22:15:05,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:05,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:15:05,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:05,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:15:05,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:15:05,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-31 22:15:05,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-31 22:15:05,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:05,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-31 22:15:05,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:05,984 INFO L124 PetriNetUnfolderBase]: 2197/3548 cut-off events. [2024-10-31 22:15:05,985 INFO L125 PetriNetUnfolderBase]: For 700/705 co-relation queries the response was YES. [2024-10-31 22:15:05,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8156 conditions, 3548 events. 2197/3548 cut-off events. For 700/705 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20592 event pairs, 1219 based on Foata normal form. 15/2693 useless extension candidates. Maximal degree in co-relation 8111. Up to 3137 conditions per place. [2024-10-31 22:15:06,005 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 63 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2024-10-31 22:15:06,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 396 flow [2024-10-31 22:15:06,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:15:06,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:15:06,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-10-31 22:15:06,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-10-31 22:15:06,007 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 238 flow. Second operand 3 states and 114 transitions. [2024-10-31 22:15:06,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 396 flow [2024-10-31 22:15:06,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 386 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-10-31 22:15:06,010 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 251 flow [2024-10-31 22:15:06,010 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-10-31 22:15:06,011 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-10-31 22:15:06,011 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 251 flow [2024-10-31 22:15:06,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-31 22:15:06,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:06,011 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:06,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:15:06,012 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:06,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1726459373, now seen corresponding path program 1 times [2024-10-31 22:15:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:06,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065563477] [2024-10-31 22:15:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:06,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:06,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065563477] [2024-10-31 22:15:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065563477] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:06,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:06,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:06,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558667319] [2024-10-31 22:15:06,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:06,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:06,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:06,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-31 22:15:06,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-10-31 22:15:06,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:06,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-31 22:15:06,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:06,601 INFO L124 PetriNetUnfolderBase]: 2336/3863 cut-off events. [2024-10-31 22:15:06,601 INFO L125 PetriNetUnfolderBase]: For 1518/1518 co-relation queries the response was YES. [2024-10-31 22:15:06,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9242 conditions, 3863 events. 2336/3863 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22815 event pairs, 1929 based on Foata normal form. 40/3015 useless extension candidates. Maximal degree in co-relation 9196. Up to 3243 conditions per place. [2024-10-31 22:15:06,617 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 54 selfloop transitions, 3 changer transitions 22/89 dead transitions. [2024-10-31 22:15:06,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 481 flow [2024-10-31 22:15:06,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:06,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-10-31 22:15:06,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4657534246575342 [2024-10-31 22:15:06,619 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 251 flow. Second operand 5 states and 170 transitions. [2024-10-31 22:15:06,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 481 flow [2024-10-31 22:15:06,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 460 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-10-31 22:15:06,622 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 249 flow [2024-10-31 22:15:06,622 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-10-31 22:15:06,623 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-10-31 22:15:06,623 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 249 flow [2024-10-31 22:15:06,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-10-31 22:15:06,623 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:06,623 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:06,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:15:06,623 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:06,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:06,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1046662206, now seen corresponding path program 1 times [2024-10-31 22:15:06,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:06,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962479172] [2024-10-31 22:15:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:06,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:06,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:06,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:06,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962479172] [2024-10-31 22:15:06,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962479172] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:06,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:06,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:06,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844030574] [2024-10-31 22:15:06,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:06,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:06,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:06,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:06,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:06,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:15:06,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-10-31 22:15:06,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:06,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:15:06,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:07,126 INFO L124 PetriNetUnfolderBase]: 1554/2585 cut-off events. [2024-10-31 22:15:07,126 INFO L125 PetriNetUnfolderBase]: For 761/761 co-relation queries the response was YES. [2024-10-31 22:15:07,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6071 conditions, 2585 events. 1554/2585 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 14688 event pairs, 1234 based on Foata normal form. 0/2146 useless extension candidates. Maximal degree in co-relation 6022. Up to 2293 conditions per place. [2024-10-31 22:15:07,137 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-10-31 22:15:07,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 351 flow [2024-10-31 22:15:07,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:07,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-10-31 22:15:07,139 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3506849315068493 [2024-10-31 22:15:07,139 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 249 flow. Second operand 5 states and 128 transitions. [2024-10-31 22:15:07,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 351 flow [2024-10-31 22:15:07,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 65 transitions, 340 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-10-31 22:15:07,142 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 238 flow [2024-10-31 22:15:07,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2024-10-31 22:15:07,143 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-10-31 22:15:07,143 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 238 flow [2024-10-31 22:15:07,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-10-31 22:15:07,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:07,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:07,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:15:07,144 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:07,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:07,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1046662205, now seen corresponding path program 1 times [2024-10-31 22:15:07,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:07,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594324477] [2024-10-31 22:15:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:07,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:07,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594324477] [2024-10-31 22:15:07,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594324477] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:07,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864998473] [2024-10-31 22:15:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:07,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:07,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:07,458 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:07,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:15:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:07,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:15:07,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:07,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-31 22:15:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:15:07,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-31 22:15:07,661 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-10-31 22:15:07,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-10-31 22:15:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:07,728 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:15:07,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864998473] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:07,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:15:07,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-10-31 22:15:07,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356381990] [2024-10-31 22:15:07,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:07,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:07,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:07,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:07,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-10-31 22:15:07,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:07,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:07,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-10-31 22:15:07,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:08,040 INFO L124 PetriNetUnfolderBase]: 1022/1763 cut-off events. [2024-10-31 22:15:08,040 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-10-31 22:15:08,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 1763 events. 1022/1763 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9743 event pairs, 779 based on Foata normal form. 146/1663 useless extension candidates. Maximal degree in co-relation 3944. Up to 1522 conditions per place. [2024-10-31 22:15:08,046 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 50 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-10-31 22:15:08,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 338 flow [2024-10-31 22:15:08,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:15:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:15:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-10-31 22:15:08,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3732876712328767 [2024-10-31 22:15:08,048 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 238 flow. Second operand 4 states and 109 transitions. [2024-10-31 22:15:08,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 338 flow [2024-10-31 22:15:08,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:15:08,050 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 232 flow [2024-10-31 22:15:08,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2024-10-31 22:15:08,051 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-10-31 22:15:08,051 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 232 flow [2024-10-31 22:15:08,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:08,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:08,051 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:08,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:15:08,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_661681ac-dd5f-41b5-9e6c-b5e583b918e0/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:15:08,255 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-10-31 22:15:08,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1435455118, now seen corresponding path program 1 times [2024-10-31 22:15:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:08,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480327199] [2024-10-31 22:15:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:15:08,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:08,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480327199] [2024-10-31 22:15:08,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480327199] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:08,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:08,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:15:08,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105469673] [2024-10-31 22:15:08,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:08,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:15:08,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:08,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:15:08,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:15:08,416 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-10-31 22:15:08,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:08,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:08,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-10-31 22:15:08,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand