./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.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_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/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_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/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_1c816b76-d108-42ca-a717-c03fc173aacf/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 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:17:25,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:17:25,166 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:17:25,170 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:17:25,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:17:25,192 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:17:25,192 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:17:25,193 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:17:25,194 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:17:25,194 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:17:25,194 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:17:25,195 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:17:25,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:17:25,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:17:25,196 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:17:25,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:17:25,197 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:17:25,198 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:17:25,198 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:17:25,199 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:17:25,199 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:17:25,202 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:17:25,202 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:17:25,203 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:17:25,203 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:17:25,203 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:17:25,204 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:17:25,204 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:17:25,204 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:17:25,205 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:17:25,205 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:17:25,205 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:17:25,212 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:17:25,212 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:17:25,213 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:17:25,213 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:17:25,213 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:17:25,213 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:17:25,214 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:17:25,214 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:17:25,214 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:17:25,215 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:17:25,215 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_1c816b76-d108-42ca-a717-c03fc173aacf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d936eafcc314e66bb4cd572754c58bf1f2fc59d35c83764f43dae769bce220a [2024-10-31 22:17:25,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:17:25,556 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:17:25,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:17:25,564 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:17:25,565 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:17:25,566 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c Unable to find full path for "g++" [2024-10-31 22:17:27,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:17:27,827 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:17:27,828 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/sv-benchmarks/c/weaver/popl20-more-array-sum-alt2.wvr.c [2024-10-31 22:17:27,842 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/data/83b9a8341/924d514d9c0e450bbd1915d943feefe8/FLAG88a9753c1 [2024-10-31 22:17:27,857 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/data/83b9a8341/924d514d9c0e450bbd1915d943feefe8 [2024-10-31 22:17:27,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:17:27,860 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:17:27,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:17:27,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:17:27,869 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:17:27,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:17:27" (1/1) ... [2024-10-31 22:17:27,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@638e5099 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:27, skipping insertion in model container [2024-10-31 22:17:27,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:17:27" (1/1) ... [2024-10-31 22:17:27,906 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:17:28,166 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 22:17:28,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:17:28,180 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:17:28,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:17:28,227 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:17:28,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28 WrapperNode [2024-10-31 22:17:28,227 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:17:28,229 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:17:28,229 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:17:28,229 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:17:28,237 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,247 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,277 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 184 [2024-10-31 22:17:28,278 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:17:28,279 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:17:28,279 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:17:28,279 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:17:28,289 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,289 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,293 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,312 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-31 22:17:28,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,327 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,337 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,338 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,344 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:17:28,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:17:28,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:17:28,347 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:17:28,348 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (1/1) ... [2024-10-31 22:17:28,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:17:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:28,380 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:17:28,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:17:28,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:17:28,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:17:28,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:17:28,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:17:28,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:17:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-31 22:17:28,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-31 22:17:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:17:28,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:17:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:17:28,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:17:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-31 22:17:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-31 22:17:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:17:28,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:17:28,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:17:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:17:28,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:17:28,428 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 22:17:28,560 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:17:28,563 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:17:28,971 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:17:28,971 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:17:29,331 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:17:29,331 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:17:29,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:17:29 BoogieIcfgContainer [2024-10-31 22:17:29,332 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:17:29,334 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:17:29,334 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:17:29,337 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:17:29,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:17:27" (1/3) ... [2024-10-31 22:17:29,338 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6313cf5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:17:29, skipping insertion in model container [2024-10-31 22:17:29,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:17:28" (2/3) ... [2024-10-31 22:17:29,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6313cf5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:17:29, skipping insertion in model container [2024-10-31 22:17:29,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:17:29" (3/3) ... [2024-10-31 22:17:29,340 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2024-10-31 22:17:29,361 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:17:29,361 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-31 22:17:29,361 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:17:29,427 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-31 22:17:29,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 44 transitions, 109 flow [2024-10-31 22:17:29,558 INFO L124 PetriNetUnfolderBase]: 4/41 cut-off events. [2024-10-31 22:17:29,559 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-31 22:17:29,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 41 events. 4/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 75 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 2 conditions per place. [2024-10-31 22:17:29,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 44 transitions, 109 flow [2024-10-31 22:17:29,567 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 40 transitions, 98 flow [2024-10-31 22:17:29,591 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:17:29,598 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;@3eb91864, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:17:29,602 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-10-31 22:17:29,605 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:17:29,605 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:17:29,606 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:17:29,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:29,606 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:17:29,610 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:29,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash 608571, now seen corresponding path program 1 times [2024-10-31 22:17:29,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:29,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421405554] [2024-10-31 22:17:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:29,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:29,908 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 22:17:29,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421405554] [2024-10-31 22:17:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421405554] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:29,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:29,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:17:29,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096513684] [2024-10-31 22:17:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:29,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:17:29,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:29,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:17:29,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:17:29,973 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:29,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 22:17:29,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:29,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:29,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:30,422 INFO L124 PetriNetUnfolderBase]: 1316/1925 cut-off events. [2024-10-31 22:17:30,423 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2024-10-31 22:17:30,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3938 conditions, 1925 events. 1316/1925 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9784 event pairs, 1060 based on Foata normal form. 1/1372 useless extension candidates. Maximal degree in co-relation 3632. Up to 1877 conditions per place. [2024-10-31 22:17:30,447 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-31 22:17:30,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-10-31 22:17:30,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:17:30,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:17:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-10-31 22:17:30,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-10-31 22:17:30,469 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 98 flow. Second operand 3 states and 61 transitions. [2024-10-31 22:17:30,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-10-31 22:17:30,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-31 22:17:30,490 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-10-31 22:17:30,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-10-31 22:17:30,497 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -7 predicate places. [2024-10-31 22:17:30,497 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-10-31 22:17:30,498 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 22:17:30,498 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:30,498 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:17:30,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:17:30,499 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:30,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:30,499 INFO L85 PathProgramCache]: Analyzing trace with hash 608572, now seen corresponding path program 1 times [2024-10-31 22:17:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:30,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110558848] [2024-10-31 22:17:30,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:30,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:30,859 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 22:17:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110558848] [2024-10-31 22:17:30,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110558848] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:30,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:30,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:17:30,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036148499] [2024-10-31 22:17:30,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:30,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:17:30,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:17:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:17:30,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:30,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:17:30,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:30,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:30,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:31,238 INFO L124 PetriNetUnfolderBase]: 1317/1928 cut-off events. [2024-10-31 22:17:31,238 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:17:31,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3860 conditions, 1928 events. 1317/1928 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9832 event pairs, 1060 based on Foata normal form. 0/1374 useless extension candidates. Maximal degree in co-relation 3838. Up to 1882 conditions per place. [2024-10-31 22:17:31,252 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-10-31 22:17:31,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-10-31 22:17:31,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:17:31,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:17:31,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-10-31 22:17:31,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4147727272727273 [2024-10-31 22:17:31,259 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-10-31 22:17:31,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-10-31 22:17:31,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:31,261 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-10-31 22:17:31,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-10-31 22:17:31,265 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-10-31 22:17:31,265 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-10-31 22:17:31,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 22:17:31,265 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:31,266 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:17:31,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:17:31,267 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:31,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:31,269 INFO L85 PathProgramCache]: Analyzing trace with hash 584856210, now seen corresponding path program 1 times [2024-10-31 22:17:31,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:31,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881520648] [2024-10-31 22:17:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:31,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:31,621 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 22:17:31,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:31,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881520648] [2024-10-31 22:17:31,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881520648] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360341812] [2024-10-31 22:17:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:31,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:31,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:31,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:17:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:31,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-31 22:17:31,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:31,829 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 22:17:32,086 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 22:17:32,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:32,223 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 22:17:32,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360341812] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:32,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:32,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:17:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47088750] [2024-10-31 22:17:32,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:32,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:17:32,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:17:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:17:32,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:32,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 22:17:32,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:32,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:32,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:32,909 INFO L124 PetriNetUnfolderBase]: 1317/1927 cut-off events. [2024-10-31 22:17:32,909 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:17:32,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3867 conditions, 1927 events. 1317/1927 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9798 event pairs, 1060 based on Foata normal form. 0/1373 useless extension candidates. Maximal degree in co-relation 3845. Up to 1878 conditions per place. [2024-10-31 22:17:32,923 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-10-31 22:17:32,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-10-31 22:17:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:17:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:17:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-10-31 22:17:32,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3409090909090909 [2024-10-31 22:17:32,926 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-10-31 22:17:32,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-10-31 22:17:32,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:17:32,928 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-10-31 22:17:32,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-10-31 22:17:32,929 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2024-10-31 22:17:32,929 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-10-31 22:17:32,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 22:17:32,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:32,930 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:17:32,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:17:33,130 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:33,131 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:33,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash 952797354, now seen corresponding path program 1 times [2024-10-31 22:17:33,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:33,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52443505] [2024-10-31 22:17:33,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:33,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:33,233 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 22:17:33,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:33,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52443505] [2024-10-31 22:17:33,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52443505] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:33,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:33,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:17:33,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314788205] [2024-10-31 22:17:33,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:33,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:17:33,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:33,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:17:33,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:17:33,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:33,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 22:17:33,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:33,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:33,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:33,453 INFO L124 PetriNetUnfolderBase]: 793/1173 cut-off events. [2024-10-31 22:17:33,453 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-10-31 22:17:33,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2364 conditions, 1173 events. 793/1173 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5312 event pairs, 608 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 2338. Up to 1135 conditions per place. [2024-10-31 22:17:33,462 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 29 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-10-31 22:17:33,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 172 flow [2024-10-31 22:17:33,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:17:33,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:17:33,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-10-31 22:17:33,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2024-10-31 22:17:33,467 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 4 states and 68 transitions. [2024-10-31 22:17:33,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 172 flow [2024-10-31 22:17:33,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 142 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-10-31 22:17:33,468 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 84 flow [2024-10-31 22:17:33,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-10-31 22:17:33,470 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -8 predicate places. [2024-10-31 22:17:33,470 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 84 flow [2024-10-31 22:17:33,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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 22:17:33,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:33,471 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:17:33,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:17:33,471 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:33,471 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:33,472 INFO L85 PathProgramCache]: Analyzing trace with hash 952797355, now seen corresponding path program 1 times [2024-10-31 22:17:33,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:33,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602505869] [2024-10-31 22:17:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:33,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:33,549 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 22:17:33,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:33,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602505869] [2024-10-31 22:17:33,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602505869] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:33,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:33,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:17:33,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041722015] [2024-10-31 22:17:33,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:33,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:33,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:33,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:33,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:33,563 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:33,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 22:17:33,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:33,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:33,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:33,928 INFO L124 PetriNetUnfolderBase]: 1374/2050 cut-off events. [2024-10-31 22:17:33,928 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-10-31 22:17:33,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4114 conditions, 2050 events. 1374/2050 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10084 event pairs, 908 based on Foata normal form. 0/1694 useless extension candidates. Maximal degree in co-relation 2756. Up to 1347 conditions per place. [2024-10-31 22:17:33,941 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 65 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-10-31 22:17:33,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 306 flow [2024-10-31 22:17:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-10-31 22:17:33,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-10-31 22:17:33,943 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 84 flow. Second operand 5 states and 116 transitions. [2024-10-31 22:17:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 306 flow [2024-10-31 22:17:33,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 73 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:33,945 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 105 flow [2024-10-31 22:17:33,946 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2024-10-31 22:17:33,946 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2024-10-31 22:17:33,947 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 105 flow [2024-10-31 22:17:33,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 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 22:17:33,947 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:33,947 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:33,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:17:33,948 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:33,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:33,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1228269675, now seen corresponding path program 1 times [2024-10-31 22:17:33,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:33,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847054257] [2024-10-31 22:17:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:34,143 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 22:17:34,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:34,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847054257] [2024-10-31 22:17:34,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847054257] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:34,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55816600] [2024-10-31 22:17:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:34,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:34,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:34,147 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:34,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:17:34,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:34,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:17:34,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:34,315 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 22:17:34,315 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:34,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-31 22:17:34,390 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 22:17:34,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55816600] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:34,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:34,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:17:34,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045671930] [2024-10-31 22:17:34,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:34,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:17:34,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:17:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:17:34,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:17:34,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 105 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:34,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:34,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:17:34,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:35,108 INFO L124 PetriNetUnfolderBase]: 1583/2381 cut-off events. [2024-10-31 22:17:35,109 INFO L125 PetriNetUnfolderBase]: For 495/554 co-relation queries the response was YES. [2024-10-31 22:17:35,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 2381 events. 1583/2381 cut-off events. For 495/554 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 12067 event pairs, 841 based on Foata normal form. 0/2057 useless extension candidates. Maximal degree in co-relation 3615. Up to 987 conditions per place. [2024-10-31 22:17:35,124 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 78 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-10-31 22:17:35,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 91 transitions, 397 flow [2024-10-31 22:17:35,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:17:35,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:17:35,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-10-31 22:17:35,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.512987012987013 [2024-10-31 22:17:35,126 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 105 flow. Second operand 7 states and 158 transitions. [2024-10-31 22:17:35,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 91 transitions, 397 flow [2024-10-31 22:17:35,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 91 transitions, 392 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:35,130 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 141 flow [2024-10-31 22:17:35,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=141, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-10-31 22:17:35,131 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-10-31 22:17:35,131 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 141 flow [2024-10-31 22:17:35,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:35,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:35,131 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:35,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:17:35,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:17:35,332 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:35,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:35,333 INFO L85 PathProgramCache]: Analyzing trace with hash 809084184, now seen corresponding path program 1 times [2024-10-31 22:17:35,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:35,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856575734] [2024-10-31 22:17:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:35,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:35,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:35,437 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 22:17:35,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:35,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856575734] [2024-10-31 22:17:35,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856575734] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:35,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:35,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:17:35,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318929377] [2024-10-31 22:17:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:35,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:35,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:35,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:35,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:35,457 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:35,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 22:17:35,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:35,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:35,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:35,871 INFO L124 PetriNetUnfolderBase]: 1597/2360 cut-off events. [2024-10-31 22:17:35,871 INFO L125 PetriNetUnfolderBase]: For 2106/2237 co-relation queries the response was YES. [2024-10-31 22:17:35,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6009 conditions, 2360 events. 1597/2360 cut-off events. For 2106/2237 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10917 event pairs, 1152 based on Foata normal form. 0/2062 useless extension candidates. Maximal degree in co-relation 5089. Up to 1932 conditions per place. [2024-10-31 22:17:35,887 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 61 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-10-31 22:17:35,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 69 transitions, 345 flow [2024-10-31 22:17:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:35,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-10-31 22:17:35,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-10-31 22:17:35,890 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 141 flow. Second operand 5 states and 109 transitions. [2024-10-31 22:17:35,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 69 transitions, 345 flow [2024-10-31 22:17:35,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 331 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-10-31 22:17:35,894 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 154 flow [2024-10-31 22:17:35,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-10-31 22:17:35,895 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-10-31 22:17:35,896 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 154 flow [2024-10-31 22:17:35,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 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 22:17:35,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:35,896 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:35,896 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:17:35,897 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:35,900 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 133990468, now seen corresponding path program 1 times [2024-10-31 22:17:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:35,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089300554] [2024-10-31 22:17:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:35,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:36,002 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 22:17:36,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:36,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089300554] [2024-10-31 22:17:36,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089300554] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:36,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:36,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:17:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682856144] [2024-10-31 22:17:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:36,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:17:36,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:36,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:17:36,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:17:36,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:36,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 22:17:36,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:36,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:36,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:36,375 INFO L124 PetriNetUnfolderBase]: 1468/2133 cut-off events. [2024-10-31 22:17:36,376 INFO L125 PetriNetUnfolderBase]: For 2057/2277 co-relation queries the response was YES. [2024-10-31 22:17:36,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5737 conditions, 2133 events. 1468/2133 cut-off events. For 2057/2277 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 9754 event pairs, 1104 based on Foata normal form. 0/1872 useless extension candidates. Maximal degree in co-relation 5084. Up to 1890 conditions per place. [2024-10-31 22:17:36,392 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 54 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-10-31 22:17:36,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 332 flow [2024-10-31 22:17:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2024-10-31 22:17:36,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-10-31 22:17:36,394 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 154 flow. Second operand 5 states and 102 transitions. [2024-10-31 22:17:36,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 332 flow [2024-10-31 22:17:36,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 62 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:36,398 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 174 flow [2024-10-31 22:17:36,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-10-31 22:17:36,399 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-10-31 22:17:36,399 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 174 flow [2024-10-31 22:17:36,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 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 22:17:36,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:36,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:36,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:17:36,400 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:36,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash 747708802, now seen corresponding path program 1 times [2024-10-31 22:17:36,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:36,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091637639] [2024-10-31 22:17:36,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:36,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:36,614 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 22:17:36,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091637639] [2024-10-31 22:17:36,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091637639] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:36,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214580885] [2024-10-31 22:17:36,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:36,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:36,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:36,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:36,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:17:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:36,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:17:36,705 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:36,780 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 22:17:36,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:36,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-10-31 22:17:36,862 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 22:17:36,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214580885] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:36,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:36,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-31 22:17:36,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068965393] [2024-10-31 22:17:36,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:36,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-31 22:17:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-31 22:17:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:17:36,928 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:17:36,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 174 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 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 22:17:36,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:36,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:17:36,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:37,652 INFO L124 PetriNetUnfolderBase]: 1811/2718 cut-off events. [2024-10-31 22:17:37,652 INFO L125 PetriNetUnfolderBase]: For 2624/2898 co-relation queries the response was YES. [2024-10-31 22:17:37,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7479 conditions, 2718 events. 1811/2718 cut-off events. For 2624/2898 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13186 event pairs, 734 based on Foata normal form. 0/2518 useless extension candidates. Maximal degree in co-relation 6735. Up to 1389 conditions per place. [2024-10-31 22:17:37,670 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 79 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-10-31 22:17:37,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 92 transitions, 520 flow [2024-10-31 22:17:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:17:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:17:37,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-10-31 22:17:37,672 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-10-31 22:17:37,672 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 174 flow. Second operand 7 states and 150 transitions. [2024-10-31 22:17:37,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 92 transitions, 520 flow [2024-10-31 22:17:37,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 92 transitions, 515 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:37,679 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 210 flow [2024-10-31 22:17:37,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=210, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-10-31 22:17:37,680 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 14 predicate places. [2024-10-31 22:17:37,681 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 210 flow [2024-10-31 22:17:37,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 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 22:17:37,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:37,681 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:37,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:17:37,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:37,882 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:37,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:37,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1740092478, now seen corresponding path program 1 times [2024-10-31 22:17:37,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:37,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777425353] [2024-10-31 22:17:37,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:37,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:37,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:37,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777425353] [2024-10-31 22:17:37,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777425353] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:37,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397956044] [2024-10-31 22:17:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:37,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:37,992 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:37,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:17:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:38,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:17:38,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:38,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:38,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397956044] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:38,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:38,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-10-31 22:17:38,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25957560] [2024-10-31 22:17:38,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:38,245 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:17:38,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:38,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:17:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:17:38,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:38,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 210 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 22:17:38,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:38,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:38,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:39,294 INFO L124 PetriNetUnfolderBase]: 3628/5286 cut-off events. [2024-10-31 22:17:39,294 INFO L125 PetriNetUnfolderBase]: For 6900/7301 co-relation queries the response was YES. [2024-10-31 22:17:39,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16627 conditions, 5286 events. 3628/5286 cut-off events. For 6900/7301 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 27393 event pairs, 2002 based on Foata normal form. 86/5144 useless extension candidates. Maximal degree in co-relation 9553. Up to 2940 conditions per place. [2024-10-31 22:17:39,339 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 13 changer transitions 0/120 dead transitions. [2024-10-31 22:17:39,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 744 flow [2024-10-31 22:17:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:17:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:17:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-10-31 22:17:39,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-10-31 22:17:39,341 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 210 flow. Second operand 8 states and 165 transitions. [2024-10-31 22:17:39,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 744 flow [2024-10-31 22:17:39,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 723 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-10-31 22:17:39,355 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 296 flow [2024-10-31 22:17:39,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2024-10-31 22:17:39,356 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2024-10-31 22:17:39,356 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 296 flow [2024-10-31 22:17:39,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 22:17:39,357 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:39,357 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:39,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:17:39,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:17:39,558 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:39,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:39,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1281790510, now seen corresponding path program 1 times [2024-10-31 22:17:39,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173591350] [2024-10-31 22:17:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:39,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:39,813 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 22:17:39,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:39,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173591350] [2024-10-31 22:17:39,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173591350] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:39,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669080355] [2024-10-31 22:17:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:39,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:39,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:39,817 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:39,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:17:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:39,908 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-31 22:17:39,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:40,117 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 22:17:40,118 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:17:40,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669080355] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:40,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:17:40,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-10-31 22:17:40,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131210878] [2024-10-31 22:17:40,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:40,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:17:40,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:40,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:17:40,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:17:40,181 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:40,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 296 flow. Second operand has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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 22:17:40,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:40,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:40,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:41,066 INFO L124 PetriNetUnfolderBase]: 2977/4337 cut-off events. [2024-10-31 22:17:41,066 INFO L125 PetriNetUnfolderBase]: For 10587/11050 co-relation queries the response was YES. [2024-10-31 22:17:41,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15037 conditions, 4337 events. 2977/4337 cut-off events. For 10587/11050 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 21635 event pairs, 999 based on Foata normal form. 0/4148 useless extension candidates. Maximal degree in co-relation 8070. Up to 1920 conditions per place. [2024-10-31 22:17:41,105 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 91 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-10-31 22:17:41,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 816 flow [2024-10-31 22:17:41,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:17:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:17:41,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-10-31 22:17:41,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-10-31 22:17:41,107 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 296 flow. Second operand 6 states and 110 transitions. [2024-10-31 22:17:41,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 816 flow [2024-10-31 22:17:41,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 801 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-31 22:17:41,120 INFO L231 Difference]: Finished difference. Result has 71 places, 54 transitions, 307 flow [2024-10-31 22:17:41,121 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=307, PETRI_PLACES=71, PETRI_TRANSITIONS=54} [2024-10-31 22:17:41,121 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2024-10-31 22:17:41,121 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 54 transitions, 307 flow [2024-10-31 22:17:41,122 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.714285714285714) internal successors, (75), 7 states have internal predecessors, (75), 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 22:17:41,122 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:41,122 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:41,143 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-31 22:17:41,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-10-31 22:17:41,323 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:41,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:41,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1293148760, now seen corresponding path program 1 times [2024-10-31 22:17:41,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:41,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556268455] [2024-10-31 22:17:41,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:41,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:41,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:41,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556268455] [2024-10-31 22:17:41,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556268455] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:41,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714911734] [2024-10-31 22:17:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:41,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:41,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:41,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:41,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:17:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:41,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-31 22:17:41,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:41,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:41,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714911734] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:41,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:41,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-10-31 22:17:41,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840489771] [2024-10-31 22:17:41,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:41,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:17:41,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:41,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:17:41,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:17:41,858 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:41,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 54 transitions, 307 flow. Second operand has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 22:17:41,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:41,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:41,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:42,906 INFO L124 PetriNetUnfolderBase]: 2677/3909 cut-off events. [2024-10-31 22:17:42,907 INFO L125 PetriNetUnfolderBase]: For 8890/9310 co-relation queries the response was YES. [2024-10-31 22:17:42,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13915 conditions, 3909 events. 2677/3909 cut-off events. For 8890/9310 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18596 event pairs, 1549 based on Foata normal form. 54/3960 useless extension candidates. Maximal degree in co-relation 8743. Up to 2459 conditions per place. [2024-10-31 22:17:42,949 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 89 selfloop transitions, 13 changer transitions 0/105 dead transitions. [2024-10-31 22:17:42,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 105 transitions, 767 flow [2024-10-31 22:17:42,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:17:42,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:17:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-10-31 22:17:42,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-10-31 22:17:42,952 INFO L175 Difference]: Start difference. First operand has 71 places, 54 transitions, 307 flow. Second operand 8 states and 156 transitions. [2024-10-31 22:17:42,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 105 transitions, 767 flow [2024-10-31 22:17:42,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 105 transitions, 725 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:17:42,973 INFO L231 Difference]: Finished difference. Result has 76 places, 58 transitions, 363 flow [2024-10-31 22:17:42,974 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=76, PETRI_TRANSITIONS=58} [2024-10-31 22:17:42,974 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 30 predicate places. [2024-10-31 22:17:42,974 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 58 transitions, 363 flow [2024-10-31 22:17:42,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.2) internal successors, (168), 15 states have internal predecessors, (168), 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 22:17:42,975 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:42,975 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:42,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:17:43,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-10-31 22:17:43,180 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:43,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1332811884, now seen corresponding path program 2 times [2024-10-31 22:17:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:43,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460236618] [2024-10-31 22:17:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:43,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:43,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460236618] [2024-10-31 22:17:43,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460236618] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707030235] [2024-10-31 22:17:43,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:17:43,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:43,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:43,476 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:43,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:17:43,564 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:17:43,564 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:17:43,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-31 22:17:43,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:43,590 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 8 treesize of output 1 [2024-10-31 22:17:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:17:43,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:44,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:17:44,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707030235] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:44,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:44,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-31 22:17:44,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69354912] [2024-10-31 22:17:44,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:44,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-31 22:17:44,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:44,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-31 22:17:44,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-10-31 22:17:44,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:44,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 58 transitions, 363 flow. Second operand has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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 22:17:44,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:44,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:44,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:46,458 INFO L124 PetriNetUnfolderBase]: 2903/4192 cut-off events. [2024-10-31 22:17:46,458 INFO L125 PetriNetUnfolderBase]: For 10202/10699 co-relation queries the response was YES. [2024-10-31 22:17:46,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15392 conditions, 4192 events. 2903/4192 cut-off events. For 10202/10699 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 20544 event pairs, 499 based on Foata normal form. 72/4260 useless extension candidates. Maximal degree in co-relation 9881. Up to 828 conditions per place. [2024-10-31 22:17:46,495 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 172 selfloop transitions, 20 changer transitions 0/195 dead transitions. [2024-10-31 22:17:46,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 195 transitions, 1370 flow [2024-10-31 22:17:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:17:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:17:46,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 290 transitions. [2024-10-31 22:17:46,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-10-31 22:17:46,497 INFO L175 Difference]: Start difference. First operand has 76 places, 58 transitions, 363 flow. Second operand 14 states and 290 transitions. [2024-10-31 22:17:46,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 195 transitions, 1370 flow [2024-10-31 22:17:46,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 195 transitions, 1342 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-10-31 22:17:46,515 INFO L231 Difference]: Finished difference. Result has 86 places, 60 transitions, 415 flow [2024-10-31 22:17:46,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=415, PETRI_PLACES=86, PETRI_TRANSITIONS=60} [2024-10-31 22:17:46,516 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 40 predicate places. [2024-10-31 22:17:46,517 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 60 transitions, 415 flow [2024-10-31 22:17:46,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.944444444444445) internal successors, (197), 18 states have internal predecessors, (197), 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 22:17:46,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:46,517 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:46,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:17:46,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:46,722 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:46,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:46,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1125410770, now seen corresponding path program 2 times [2024-10-31 22:17:46,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:46,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970287995] [2024-10-31 22:17:46,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:46,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:46,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:17:46,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970287995] [2024-10-31 22:17:46,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970287995] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:46,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810847621] [2024-10-31 22:17:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:17:46,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:46,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:46,991 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:46,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:17:47,078 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:17:47,079 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:17:47,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:17:47,081 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:47,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:47,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-10-31 22:17:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:47,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810847621] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:47,493 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:47,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-10-31 22:17:47,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604299721] [2024-10-31 22:17:47,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:47,494 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-31 22:17:47,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:47,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-31 22:17:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2024-10-31 22:17:47,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 44 [2024-10-31 22:17:47,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 60 transitions, 415 flow. Second operand has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:47,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:47,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 44 [2024-10-31 22:17:47,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:49,647 INFO L124 PetriNetUnfolderBase]: 3482/4995 cut-off events. [2024-10-31 22:17:49,647 INFO L125 PetriNetUnfolderBase]: For 16484/17289 co-relation queries the response was YES. [2024-10-31 22:17:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 4995 events. 3482/4995 cut-off events. For 16484/17289 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 23288 event pairs, 557 based on Foata normal form. 234/5225 useless extension candidates. Maximal degree in co-relation 13568. Up to 909 conditions per place. [2024-10-31 22:17:49,750 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 162 selfloop transitions, 21 changer transitions 0/188 dead transitions. [2024-10-31 22:17:49,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 188 transitions, 1485 flow [2024-10-31 22:17:49,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:17:49,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:17:49,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 277 transitions. [2024-10-31 22:17:49,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4496753246753247 [2024-10-31 22:17:49,753 INFO L175 Difference]: Start difference. First operand has 86 places, 60 transitions, 415 flow. Second operand 14 states and 277 transitions. [2024-10-31 22:17:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 188 transitions, 1485 flow [2024-10-31 22:17:49,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1294 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-10-31 22:17:49,780 INFO L231 Difference]: Finished difference. Result has 90 places, 63 transitions, 427 flow [2024-10-31 22:17:49,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=90, PETRI_TRANSITIONS=63} [2024-10-31 22:17:49,782 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 44 predicate places. [2024-10-31 22:17:49,782 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 63 transitions, 427 flow [2024-10-31 22:17:49,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.2) internal successors, (224), 20 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:49,783 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:49,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:49,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-10-31 22:17:49,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-10-31 22:17:49,988 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:49,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:49,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1413948225, now seen corresponding path program 1 times [2024-10-31 22:17:49,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:49,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842398644] [2024-10-31 22:17:49,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:50,080 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 22:17:50,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:50,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842398644] [2024-10-31 22:17:50,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842398644] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:50,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:50,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:17:50,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114965926] [2024-10-31 22:17:50,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:50,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:17:50,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:50,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:17:50,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:17:50,083 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-31 22:17:50,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 63 transitions, 427 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 22:17:50,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:50,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-31 22:17:50,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:50,722 INFO L124 PetriNetUnfolderBase]: 2982/4507 cut-off events. [2024-10-31 22:17:50,722 INFO L125 PetriNetUnfolderBase]: For 15282/15967 co-relation queries the response was YES. [2024-10-31 22:17:50,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17499 conditions, 4507 events. 2982/4507 cut-off events. For 15282/15967 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 22101 event pairs, 744 based on Foata normal form. 29/4515 useless extension candidates. Maximal degree in co-relation 11749. Up to 3550 conditions per place. [2024-10-31 22:17:50,755 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 64 selfloop transitions, 4 changer transitions 8/84 dead transitions. [2024-10-31 22:17:50,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 84 transitions, 702 flow [2024-10-31 22:17:50,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:17:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:17:50,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-10-31 22:17:50,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-10-31 22:17:50,757 INFO L175 Difference]: Start difference. First operand has 90 places, 63 transitions, 427 flow. Second operand 3 states and 74 transitions. [2024-10-31 22:17:50,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 84 transitions, 702 flow [2024-10-31 22:17:50,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 84 transitions, 625 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-10-31 22:17:50,783 INFO L231 Difference]: Finished difference. Result has 83 places, 59 transitions, 343 flow [2024-10-31 22:17:50,783 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=59} [2024-10-31 22:17:50,784 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 37 predicate places. [2024-10-31 22:17:50,784 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 59 transitions, 343 flow [2024-10-31 22:17:50,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 22:17:50,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:50,785 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 22:17:50,785 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:17:50,785 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:50,785 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1719107638, now seen corresponding path program 1 times [2024-10-31 22:17:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:50,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732337924] [2024-10-31 22:17:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:50,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:50,912 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 22:17:50,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732337924] [2024-10-31 22:17:50,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732337924] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:50,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924339726] [2024-10-31 22:17:50,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:50,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:50,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:50,916 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:50,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:17:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:51,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:17:51,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:51,105 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 22:17:51,105 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:51,171 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 22:17:51,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924339726] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:51,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-31 22:17:51,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-10-31 22:17:51,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675271038] [2024-10-31 22:17:51,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:51,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:17:51,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:51,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:17:51,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:17:51,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-10-31 22:17:51,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 59 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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 22:17:51,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:51,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-10-31 22:17:51,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:51,981 INFO L124 PetriNetUnfolderBase]: 4798/6881 cut-off events. [2024-10-31 22:17:51,981 INFO L125 PetriNetUnfolderBase]: For 17135/17730 co-relation queries the response was YES. [2024-10-31 22:17:52,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25305 conditions, 6881 events. 4798/6881 cut-off events. For 17135/17730 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 34580 event pairs, 1232 based on Foata normal form. 50/6458 useless extension candidates. Maximal degree in co-relation 18143. Up to 2532 conditions per place. [2024-10-31 22:17:52,025 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 150 selfloop transitions, 21 changer transitions 0/175 dead transitions. [2024-10-31 22:17:52,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 175 transitions, 1394 flow [2024-10-31 22:17:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-31 22:17:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-31 22:17:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-10-31 22:17:52,027 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-10-31 22:17:52,027 INFO L175 Difference]: Start difference. First operand has 83 places, 59 transitions, 343 flow. Second operand 9 states and 165 transitions. [2024-10-31 22:17:52,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 175 transitions, 1394 flow [2024-10-31 22:17:52,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 175 transitions, 1250 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-10-31 22:17:52,087 INFO L231 Difference]: Finished difference. Result has 80 places, 71 transitions, 410 flow [2024-10-31 22:17:52,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=410, PETRI_PLACES=80, PETRI_TRANSITIONS=71} [2024-10-31 22:17:52,088 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-10-31 22:17:52,088 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 71 transitions, 410 flow [2024-10-31 22:17:52,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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 22:17:52,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:52,088 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 22:17:52,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:17:52,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:52,293 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:52,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:52,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1758632884, now seen corresponding path program 2 times [2024-10-31 22:17:52,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:52,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437383783] [2024-10-31 22:17:52,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:52,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:52,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:52,452 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 22:17:52,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437383783] [2024-10-31 22:17:52,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437383783] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:52,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597092962] [2024-10-31 22:17:52,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:17:52,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:52,456 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:52,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:17:52,556 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:17:52,557 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:17:52,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:17:52,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:52,634 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 22:17:52,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:52,720 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 22:17:52,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597092962] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:52,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:52,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-10-31 22:17:52,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738539902] [2024-10-31 22:17:52,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:52,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:17:52,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:17:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:17:52,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-10-31 22:17:52,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 410 flow. Second operand has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:52,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:52,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-10-31 22:17:52,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:54,073 INFO L124 PetriNetUnfolderBase]: 7451/10707 cut-off events. [2024-10-31 22:17:54,073 INFO L125 PetriNetUnfolderBase]: For 21066/21292 co-relation queries the response was YES. [2024-10-31 22:17:54,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37997 conditions, 10707 events. 7451/10707 cut-off events. For 21066/21292 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 56634 event pairs, 1049 based on Foata normal form. 40/10565 useless extension candidates. Maximal degree in co-relation 27722. Up to 2288 conditions per place. [2024-10-31 22:17:54,132 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 211 selfloop transitions, 59 changer transitions 0/274 dead transitions. [2024-10-31 22:17:54,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 274 transitions, 2127 flow [2024-10-31 22:17:54,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-31 22:17:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-31 22:17:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 229 transitions. [2024-10-31 22:17:54,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3717532467532468 [2024-10-31 22:17:54,134 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 410 flow. Second operand 14 states and 229 transitions. [2024-10-31 22:17:54,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 274 transitions, 2127 flow [2024-10-31 22:17:54,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 274 transitions, 2124 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:54,198 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 893 flow [2024-10-31 22:17:54,198 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-10-31 22:17:54,199 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 51 predicate places. [2024-10-31 22:17:54,199 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 893 flow [2024-10-31 22:17:54,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.642857142857142) internal successors, (149), 14 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:17:54,199 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:54,199 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 22:17:54,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:17:54,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:54,404 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-10-31 22:17:54,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash 643348074, now seen corresponding path program 3 times [2024-10-31 22:17:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:54,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569287736] [2024-10-31 22:17:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:54,533 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 22:17:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:54,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569287736] [2024-10-31 22:17:54,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569287736] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:54,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872478941] [2024-10-31 22:17:54,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-31 22:17:54,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:54,536 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:54,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1c816b76-d108-42ca-a717-c03fc173aacf/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-10-31 22:17:54,639 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-31 22:17:54,639 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:17:54,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-31 22:17:54,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:54,755 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 22:17:54,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:54,837 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 22:17:54,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872478941] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:54,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:54,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-10-31 22:17:54,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012005561] [2024-10-31 22:17:54,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:54,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:17:54,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:17:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:17:54,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-10-31 22:17:54,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 893 flow. Second operand has 15 states, 15 states have (on average 11.133333333333333) internal successors, (167), 15 states have internal predecessors, (167), 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 22:17:54,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:54,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-10-31 22:17:54,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand