./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 18:53:22,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 18:53:22,346 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 18:53:22,356 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 18:53:22,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 18:53:22,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 18:53:22,407 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 18:53:22,407 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 18:53:22,409 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 18:53:22,410 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 18:53:22,411 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 18:53:22,411 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 18:53:22,412 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 18:53:22,413 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 18:53:22,416 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 18:53:22,416 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 18:53:22,417 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 18:53:22,417 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 18:53:22,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 18:53:22,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 18:53:22,419 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 18:53:22,421 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 18:53:22,422 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 18:53:22,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 18:53:22,423 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 18:53:22,423 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 18:53:22,424 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 18:53:22,424 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 18:53:22,427 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 18:53:22,427 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 18:53:22,429 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 18:53:22,429 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 18:53:22,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 18:53:22,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:53:22,432 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 18:53:22,433 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 18:53:22,433 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 18:53:22,433 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 18:53:22,434 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 18:53:22,434 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 18:53:22,435 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 18:53:22,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 18:53:22,436 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_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-11-08 18:53:22,763 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 18:53:22,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 18:53:22,803 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 18:53:22,805 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 18:53:22,809 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 18:53:22,812 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c Unable to find full path for "g++" [2024-11-08 18:53:24,936 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 18:53:25,171 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 18:53:25,172 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-11-08 18:53:25,184 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/data/245418cbf/5a21da452ac642c4a8796dde517c8ade/FLAGda0871206 [2024-11-08 18:53:25,200 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/data/245418cbf/5a21da452ac642c4a8796dde517c8ade [2024-11-08 18:53:25,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 18:53:25,204 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 18:53:25,206 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 18:53:25,206 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 18:53:25,212 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 18:53:25,213 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,217 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c471527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25, skipping insertion in model container [2024-11-08 18:53:25,217 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,254 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 18:53:25,474 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 18:53:25,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:53:25,490 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 18:53:25,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 18:53:25,547 INFO L204 MainTranslator]: Completed translation [2024-11-08 18:53:25,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25 WrapperNode [2024-11-08 18:53:25,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 18:53:25,549 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 18:53:25,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 18:53:25,550 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 18:53:25,556 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,606 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 331 [2024-11-08 18:53:25,606 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 18:53:25,607 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 18:53:25,607 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 18:53:25,607 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 18:53:25,619 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,619 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,624 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,644 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-08 18:53:25,644 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,662 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,671 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 18:53:25,673 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 18:53:25,673 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 18:53:25,673 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 18:53:25,674 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (1/1) ... [2024-11-08 18:53:25,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 18:53:25,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:53:25,712 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 18:53:25,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 18:53:25,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 18:53:25,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 18:53:25,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 18:53:25,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 18:53:25,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 18:53:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 18:53:25,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 18:53:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 18:53:25,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 18:53:25,754 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 18:53:25,754 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 18:53:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-08 18:53:25,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-08 18:53:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 18:53:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 18:53:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-08 18:53:25,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-08 18:53:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 18:53:25,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 18:53:25,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 18:53:25,758 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 18:53:25,889 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 18:53:25,891 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 18:53:26,474 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 18:53:26,474 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 18:53:27,024 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 18:53:27,024 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 18:53:27,025 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:53:27 BoogieIcfgContainer [2024-11-08 18:53:27,025 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 18:53:27,028 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 18:53:27,028 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 18:53:27,031 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 18:53:27,032 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 06:53:25" (1/3) ... [2024-11-08 18:53:27,032 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e96809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:53:27, skipping insertion in model container [2024-11-08 18:53:27,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 06:53:25" (2/3) ... [2024-11-08 18:53:27,033 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62e96809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 06:53:27, skipping insertion in model container [2024-11-08 18:53:27,033 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 06:53:27" (3/3) ... [2024-11-08 18:53:27,035 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-11-08 18:53:27,082 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 18:53:27,082 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-08 18:53:27,082 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 18:53:27,222 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-08 18:53:27,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 96 transitions, 220 flow [2024-11-08 18:53:27,332 INFO L124 PetriNetUnfolderBase]: 14/92 cut-off events. [2024-11-08 18:53:27,333 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-08 18:53:27,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 92 events. 14/92 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 231 event pairs, 0 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 76. Up to 2 conditions per place. [2024-11-08 18:53:27,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 96 transitions, 220 flow [2024-11-08 18:53:27,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 91 transitions, 206 flow [2024-11-08 18:53:27,357 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 18:53:27,370 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@421343dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 18:53:27,370 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-08 18:53:27,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 18:53:27,377 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 18:53:27,378 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:53:27,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:27,379 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:53:27,379 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:27,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash 32080559, now seen corresponding path program 1 times [2024-11-08 18:53:27,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:27,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671167057] [2024-11-08 18:53:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:27,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:27,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:27,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671167057] [2024-11-08 18:53:27,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671167057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:27,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:27,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 18:53:27,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503060301] [2024-11-08 18:53:27,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:27,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 18:53:27,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:27,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 18:53:27,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 18:53:27,762 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-08 18:53:27,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 91 transitions, 206 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:27,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:27,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-08 18:53:27,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:30,497 INFO L124 PetriNetUnfolderBase]: 9392/14178 cut-off events. [2024-11-08 18:53:30,498 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-08 18:53:30,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27045 conditions, 14178 events. 9392/14178 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 118016 event pairs, 8782 based on Foata normal form. 1/6822 useless extension candidates. Maximal degree in co-relation 25434. Up to 12043 conditions per place. [2024-11-08 18:53:30,686 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 41 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2024-11-08 18:53:30,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 84 transitions, 278 flow [2024-11-08 18:53:30,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 18:53:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 18:53:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 187 transitions. [2024-11-08 18:53:30,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6493055555555556 [2024-11-08 18:53:30,701 INFO L175 Difference]: Start difference. First operand has 90 places, 91 transitions, 206 flow. Second operand 3 states and 187 transitions. [2024-11-08 18:53:30,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 84 transitions, 278 flow [2024-11-08 18:53:30,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 262 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-08 18:53:30,746 INFO L231 Difference]: Finished difference. Result has 77 places, 84 transitions, 180 flow [2024-11-08 18:53:30,749 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=84} [2024-11-08 18:53:30,753 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -13 predicate places. [2024-11-08 18:53:30,753 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 84 transitions, 180 flow [2024-11-08 18:53:30,754 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:30,754 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:30,754 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 18:53:30,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 18:53:30,755 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:30,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:30,756 INFO L85 PathProgramCache]: Analyzing trace with hash 32080560, now seen corresponding path program 1 times [2024-11-08 18:53:30,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:30,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711097884] [2024-11-08 18:53:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:31,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:31,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711097884] [2024-11-08 18:53:31,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711097884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:31,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:31,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:53:31,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617100137] [2024-11-08 18:53:31,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:31,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:53:31,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:31,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:53:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:53:31,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-08 18:53:31,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:31,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:31,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-08 18:53:31,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:33,623 INFO L124 PetriNetUnfolderBase]: 9394/14185 cut-off events. [2024-11-08 18:53:33,624 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:53:33,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26562 conditions, 14185 events. 9394/14185 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 117817 event pairs, 8782 based on Foata normal form. 0/6820 useless extension candidates. Maximal degree in co-relation 26499. Up to 12066 conditions per place. [2024-11-08 18:53:33,777 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 57 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-08 18:53:33,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 318 flow [2024-11-08 18:53:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:53:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:53:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2024-11-08 18:53:33,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-08 18:53:33,781 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 180 flow. Second operand 4 states and 211 transitions. [2024-11-08 18:53:33,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 318 flow [2024-11-08 18:53:33,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 91 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:53:33,785 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 208 flow [2024-11-08 18:53:33,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-11-08 18:53:33,786 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -10 predicate places. [2024-11-08 18:53:33,786 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 208 flow [2024-11-08 18:53:33,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.8) internal successors, (189), 5 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:33,787 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:33,787 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 18:53:33,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 18:53:33,788 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:33,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:33,789 INFO L85 PathProgramCache]: Analyzing trace with hash 764253206, now seen corresponding path program 1 times [2024-11-08 18:53:33,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:33,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440322515] [2024-11-08 18:53:33,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:33,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:33,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:34,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440322515] [2024-11-08 18:53:34,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440322515] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:34,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:34,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:53:34,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592405045] [2024-11-08 18:53:34,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:34,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:53:34,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:53:34,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:53:34,304 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-08 18:53:34,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 208 flow. Second operand has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:34,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:34,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-08 18:53:34,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:36,523 INFO L124 PetriNetUnfolderBase]: 9396/14192 cut-off events. [2024-11-08 18:53:36,523 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 18:53:36,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26589 conditions, 14192 events. 9396/14192 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 117822 event pairs, 8782 based on Foata normal form. 0/6827 useless extension candidates. Maximal degree in co-relation 26550. Up to 12065 conditions per place. [2024-11-08 18:53:36,650 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 60 selfloop transitions, 9 changer transitions 0/98 dead transitions. [2024-11-08 18:53:36,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 98 transitions, 366 flow [2024-11-08 18:53:36,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:53:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:53:36,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 255 transitions. [2024-11-08 18:53:36,653 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-11-08 18:53:36,653 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 208 flow. Second operand 5 states and 255 transitions. [2024-11-08 18:53:36,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 98 transitions, 366 flow [2024-11-08 18:53:36,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 98 transitions, 366 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 18:53:36,659 INFO L231 Difference]: Finished difference. Result has 86 places, 92 transitions, 254 flow [2024-11-08 18:53:36,660 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=86, PETRI_TRANSITIONS=92} [2024-11-08 18:53:36,661 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -4 predicate places. [2024-11-08 18:53:36,661 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 92 transitions, 254 flow [2024-11-08 18:53:36,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.0) internal successors, (228), 6 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:36,662 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:36,662 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 18:53:36,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 18:53:36,663 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:36,663 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:36,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2064705710, now seen corresponding path program 1 times [2024-11-08 18:53:36,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:36,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996795651] [2024-11-08 18:53:36,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:36,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:36,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:37,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:37,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996795651] [2024-11-08 18:53:37,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996795651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:53:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741214493] [2024-11-08 18:53:37,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:37,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:53:37,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:53:37,037 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:53:37,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 18:53:37,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:37,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:53:37,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:53:37,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 18:53:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:37,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:53:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:37,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741214493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:53:37,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:53:37,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 18:53:37,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80676611] [2024-11-08 18:53:37,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:53:37,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 18:53:37,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:37,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 18:53:37,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-08 18:53:38,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-08 18:53:38,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 92 transitions, 254 flow. Second operand has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:38,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:38,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-08 18:53:38,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:41,073 INFO L124 PetriNetUnfolderBase]: 9395/14190 cut-off events. [2024-11-08 18:53:41,073 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-08 18:53:41,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26607 conditions, 14190 events. 9395/14190 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 117789 event pairs, 8782 based on Foata normal form. 0/6829 useless extension candidates. Maximal degree in co-relation 26563. Up to 12060 conditions per place. [2024-11-08 18:53:41,274 INFO L140 encePairwiseOnDemand]: 84/96 looper letters, 48 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-11-08 18:53:41,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 93 transitions, 382 flow [2024-11-08 18:53:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:53:41,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:53:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 321 transitions. [2024-11-08 18:53:41,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2024-11-08 18:53:41,280 INFO L175 Difference]: Start difference. First operand has 86 places, 92 transitions, 254 flow. Second operand 7 states and 321 transitions. [2024-11-08 18:53:41,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 93 transitions, 382 flow [2024-11-08 18:53:41,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 93 transitions, 375 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-08 18:53:41,288 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 279 flow [2024-11-08 18:53:41,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2024-11-08 18:53:41,293 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 0 predicate places. [2024-11-08 18:53:41,293 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 279 flow [2024-11-08 18:53:41,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:41,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:41,294 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:53:41,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 18:53:41,495 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:53:41,496 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:41,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash 5416655, now seen corresponding path program 1 times [2024-11-08 18:53:41,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:41,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851853237] [2024-11-08 18:53:41,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:41,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:41,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851853237] [2024-11-08 18:53:41,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851853237] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:41,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:41,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 18:53:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530504534] [2024-11-08 18:53:41,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:41,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:53:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:41,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:53:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:53:42,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-08 18:53:42,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 91 transitions, 279 flow. Second operand has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:42,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:42,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-08 18:53:42,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:44,114 INFO L124 PetriNetUnfolderBase]: 9395/14193 cut-off events. [2024-11-08 18:53:44,115 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-08 18:53:44,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26626 conditions, 14193 events. 9395/14193 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 118209 event pairs, 8782 based on Foata normal form. 2/6839 useless extension candidates. Maximal degree in co-relation 26607. Up to 12068 conditions per place. [2024-11-08 18:53:44,308 INFO L140 encePairwiseOnDemand]: 85/96 looper letters, 57 selfloop transitions, 10 changer transitions 0/96 dead transitions. [2024-11-08 18:53:44,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 96 transitions, 417 flow [2024-11-08 18:53:44,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:53:44,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:53:44,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 251 transitions. [2024-11-08 18:53:44,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-11-08 18:53:44,315 INFO L175 Difference]: Start difference. First operand has 90 places, 91 transitions, 279 flow. Second operand 5 states and 251 transitions. [2024-11-08 18:53:44,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 96 transitions, 417 flow [2024-11-08 18:53:44,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 96 transitions, 378 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-08 18:53:44,323 INFO L231 Difference]: Finished difference. Result has 89 places, 92 transitions, 278 flow [2024-11-08 18:53:44,326 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=89, PETRI_TRANSITIONS=92} [2024-11-08 18:53:44,327 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -1 predicate places. [2024-11-08 18:53:44,329 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 92 transitions, 278 flow [2024-11-08 18:53:44,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.333333333333336) internal successors, (230), 6 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:44,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:44,330 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 18:53:44,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 18:53:44,330 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:44,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:44,331 INFO L85 PathProgramCache]: Analyzing trace with hash 246653209, now seen corresponding path program 1 times [2024-11-08 18:53:44,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:44,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631028677] [2024-11-08 18:53:44,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:44,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631028677] [2024-11-08 18:53:44,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631028677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:53:44,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534908690] [2024-11-08 18:53:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:44,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:53:44,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:53:44,754 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:53:44,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 18:53:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:44,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:53:44,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:53:44,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:53:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:45,083 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:53:45,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:45,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534908690] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:53:45,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:53:45,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 18:53:45,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076107889] [2024-11-08 18:53:45,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:53:45,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:53:45,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:45,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:53:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:53:45,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-08 18:53:45,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 92 transitions, 278 flow. Second operand has 14 states, 14 states have (on average 38.785714285714285) internal successors, (543), 14 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:45,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:45,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-08 18:53:45,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:47,246 INFO L124 PetriNetUnfolderBase]: 9398/14205 cut-off events. [2024-11-08 18:53:47,246 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-11-08 18:53:47,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26658 conditions, 14205 events. 9398/14205 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 117746 event pairs, 8782 based on Foata normal form. 0/6847 useless extension candidates. Maximal degree in co-relation 26580. Up to 12056 conditions per place. [2024-11-08 18:53:47,367 INFO L140 encePairwiseOnDemand]: 85/96 looper letters, 55 selfloop transitions, 25 changer transitions 0/109 dead transitions. [2024-11-08 18:53:47,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 109 transitions, 497 flow [2024-11-08 18:53:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:53:47,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:53:47,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 449 transitions. [2024-11-08 18:53:47,370 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46770833333333334 [2024-11-08 18:53:47,370 INFO L175 Difference]: Start difference. First operand has 89 places, 92 transitions, 278 flow. Second operand 10 states and 449 transitions. [2024-11-08 18:53:47,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 109 transitions, 497 flow [2024-11-08 18:53:47,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:53:47,374 INFO L231 Difference]: Finished difference. Result has 95 places, 99 transitions, 356 flow [2024-11-08 18:53:47,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=356, PETRI_PLACES=95, PETRI_TRANSITIONS=99} [2024-11-08 18:53:47,375 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-08 18:53:47,375 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 99 transitions, 356 flow [2024-11-08 18:53:47,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.785714285714285) internal successors, (543), 14 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:47,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:47,376 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:53:47,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-08 18:53:47,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:53:47,580 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:47,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:47,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1840116074, now seen corresponding path program 1 times [2024-11-08 18:53:47,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:47,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001008632] [2024-11-08 18:53:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:47,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:47,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:47,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001008632] [2024-11-08 18:53:47,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001008632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:53:47,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331350851] [2024-11-08 18:53:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:47,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:53:47,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:53:47,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:53:47,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 18:53:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:48,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:53:48,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:53:48,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 18:53:48,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:48,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:53:48,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:48,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331350851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:53:48,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:53:48,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2024-11-08 18:53:48,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238581367] [2024-11-08 18:53:48,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:53:48,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 18:53:48,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:48,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 18:53:48,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-08 18:53:48,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-08 18:53:48,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 99 transitions, 356 flow. Second operand has 14 states, 14 states have (on average 39.07142857142857) internal successors, (547), 14 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:48,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:48,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-08 18:53:48,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:50,933 INFO L124 PetriNetUnfolderBase]: 9400/14212 cut-off events. [2024-11-08 18:53:50,933 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-08 18:53:50,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26704 conditions, 14212 events. 9400/14212 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 1564. Compared 117832 event pairs, 8782 based on Foata normal form. 0/6855 useless extension candidates. Maximal degree in co-relation 26593. Up to 12058 conditions per place. [2024-11-08 18:53:51,060 INFO L140 encePairwiseOnDemand]: 85/96 looper letters, 54 selfloop transitions, 29 changer transitions 0/112 dead transitions. [2024-11-08 18:53:51,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 112 transitions, 570 flow [2024-11-08 18:53:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-08 18:53:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-08 18:53:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 446 transitions. [2024-11-08 18:53:51,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46458333333333335 [2024-11-08 18:53:51,063 INFO L175 Difference]: Start difference. First operand has 95 places, 99 transitions, 356 flow. Second operand 10 states and 446 transitions. [2024-11-08 18:53:51,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 112 transitions, 570 flow [2024-11-08 18:53:51,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 112 transitions, 499 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-08 18:53:51,067 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 371 flow [2024-11-08 18:53:51,067 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2024-11-08 18:53:51,068 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-08 18:53:51,068 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 371 flow [2024-11-08 18:53:51,068 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.07142857142857) internal successors, (547), 14 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:51,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:51,069 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:53:51,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-08 18:53:51,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:53:51,273 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:51,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:51,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1597771554, now seen corresponding path program 1 times [2024-11-08 18:53:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:51,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741055326] [2024-11-08 18:53:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:51,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:51,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:51,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741055326] [2024-11-08 18:53:51,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741055326] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:51,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:51,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 18:53:51,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802733130] [2024-11-08 18:53:51,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:51,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:53:51,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:51,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:53:51,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:53:51,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 96 [2024-11-08 18:53:51,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 371 flow. Second operand has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:51,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:51,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 96 [2024-11-08 18:53:51,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:52,793 INFO L124 PetriNetUnfolderBase]: 10402/15925 cut-off events. [2024-11-08 18:53:52,793 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-11-08 18:53:52,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29900 conditions, 15925 events. 10402/15925 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 1610. Compared 135006 event pairs, 9699 based on Foata normal form. 346/8308 useless extension candidates. Maximal degree in co-relation 26602. Up to 12085 conditions per place. [2024-11-08 18:53:52,881 INFO L140 encePairwiseOnDemand]: 84/96 looper letters, 111 selfloop transitions, 4 changer transitions 0/153 dead transitions. [2024-11-08 18:53:52,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 153 transitions, 783 flow [2024-11-08 18:53:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:53:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:53:52,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 310 transitions. [2024-11-08 18:53:52,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-08 18:53:52,883 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 371 flow. Second operand 5 states and 310 transitions. [2024-11-08 18:53:52,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 153 transitions, 783 flow [2024-11-08 18:53:52,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 688 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-08 18:53:52,886 INFO L231 Difference]: Finished difference. Result has 95 places, 104 transitions, 346 flow [2024-11-08 18:53:52,887 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=346, PETRI_PLACES=95, PETRI_TRANSITIONS=104} [2024-11-08 18:53:52,888 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-08 18:53:52,888 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 104 transitions, 346 flow [2024-11-08 18:53:52,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:52,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:52,889 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:53:52,889 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 18:53:52,889 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:52,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash -2034910966, now seen corresponding path program 1 times [2024-11-08 18:53:52,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:52,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452548510] [2024-11-08 18:53:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:52,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:52,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:53,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:53,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452548510] [2024-11-08 18:53:53,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452548510] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:53,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:53,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:53:53,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178727941] [2024-11-08 18:53:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:53,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:53:53,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:53:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:53:53,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-08 18:53:53,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 104 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:53,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:53,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-08 18:53:53,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:54,034 INFO L124 PetriNetUnfolderBase]: 7723/11926 cut-off events. [2024-11-08 18:53:54,034 INFO L125 PetriNetUnfolderBase]: For 879/879 co-relation queries the response was YES. [2024-11-08 18:53:54,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25232 conditions, 11926 events. 7723/11926 cut-off events. For 879/879 co-relation queries the response was YES. Maximal size of possible extension queue 1186. Compared 98246 event pairs, 7188 based on Foata normal form. 0/6298 useless extension candidates. Maximal degree in co-relation 22468. Up to 10017 conditions per place. [2024-11-08 18:53:54,114 INFO L140 encePairwiseOnDemand]: 92/96 looper letters, 52 selfloop transitions, 6 changer transitions 0/102 dead transitions. [2024-11-08 18:53:54,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 102 transitions, 456 flow [2024-11-08 18:53:54,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 18:53:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 18:53:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 227 transitions. [2024-11-08 18:53:54,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5911458333333334 [2024-11-08 18:53:54,117 INFO L175 Difference]: Start difference. First operand has 95 places, 104 transitions, 346 flow. Second operand 4 states and 227 transitions. [2024-11-08 18:53:54,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 102 transitions, 456 flow [2024-11-08 18:53:54,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 102 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:53:54,120 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 350 flow [2024-11-08 18:53:54,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-11-08 18:53:54,121 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-08 18:53:54,121 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 350 flow [2024-11-08 18:53:54,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.0) internal successors, (192), 4 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:54,122 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:54,122 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:53:54,122 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 18:53:54,122 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:54,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash -2034910965, now seen corresponding path program 1 times [2024-11-08 18:53:54,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:54,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112455610] [2024-11-08 18:53:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:53:54,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:54,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112455610] [2024-11-08 18:53:54,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112455610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:54,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:54,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:53:54,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566648097] [2024-11-08 18:53:54,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:54,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 18:53:54,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 18:53:54,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 18:53:54,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 96 [2024-11-08 18:53:54,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:54,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:54,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 96 [2024-11-08 18:53:54,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:53:55,444 INFO L124 PetriNetUnfolderBase]: 8799/14010 cut-off events. [2024-11-08 18:53:55,444 INFO L125 PetriNetUnfolderBase]: For 1018/1018 co-relation queries the response was YES. [2024-11-08 18:53:55,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29474 conditions, 14010 events. 8799/14010 cut-off events. For 1018/1018 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 119854 event pairs, 8149 based on Foata normal form. 280/7941 useless extension candidates. Maximal degree in co-relation 26153. Up to 10076 conditions per place. [2024-11-08 18:53:55,527 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 96 selfloop transitions, 8 changer transitions 0/142 dead transitions. [2024-11-08 18:53:55,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 142 transitions, 688 flow [2024-11-08 18:53:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:53:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:53:55,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 306 transitions. [2024-11-08 18:53:55,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-11-08 18:53:55,529 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 350 flow. Second operand 5 states and 306 transitions. [2024-11-08 18:53:55,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 142 transitions, 688 flow [2024-11-08 18:53:55,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 142 transitions, 676 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 18:53:55,536 INFO L231 Difference]: Finished difference. Result has 100 places, 106 transitions, 406 flow [2024-11-08 18:53:55,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=100, PETRI_TRANSITIONS=106} [2024-11-08 18:53:55,537 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 10 predicate places. [2024-11-08 18:53:55,537 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 106 transitions, 406 flow [2024-11-08 18:53:55,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 45.75) internal successors, (183), 4 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:55,538 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:53:55,538 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:53:55,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 18:53:55,538 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:53:55,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:53:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2109116607, now seen corresponding path program 1 times [2024-11-08 18:53:55,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:53:55,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322560752] [2024-11-08 18:53:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:53:55,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:53:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:53:55,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:53:55,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:53:55,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322560752] [2024-11-08 18:53:55,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322560752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:53:55,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:53:55,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:53:55,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370861330] [2024-11-08 18:53:55,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:53:55,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:53:55,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:53:55,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:53:55,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:53:55,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 96 [2024-11-08 18:53:55,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 106 transitions, 406 flow. Second operand has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:53:55,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:53:55,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 96 [2024-11-08 18:53:55,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:54:00,570 INFO L124 PetriNetUnfolderBase]: 29313/43467 cut-off events. [2024-11-08 18:54:00,570 INFO L125 PetriNetUnfolderBase]: For 4534/6454 co-relation queries the response was YES. [2024-11-08 18:54:00,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102703 conditions, 43467 events. 29313/43467 cut-off events. For 4534/6454 co-relation queries the response was YES. Maximal size of possible extension queue 3214. Compared 372207 event pairs, 12957 based on Foata normal form. 628/27584 useless extension candidates. Maximal degree in co-relation 88590. Up to 17403 conditions per place. [2024-11-08 18:54:00,993 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 140 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2024-11-08 18:54:00,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 188 transitions, 964 flow [2024-11-08 18:54:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:54:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:54:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 408 transitions. [2024-11-08 18:54:00,996 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-08 18:54:00,996 INFO L175 Difference]: Start difference. First operand has 100 places, 106 transitions, 406 flow. Second operand 7 states and 408 transitions. [2024-11-08 18:54:00,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 188 transitions, 964 flow [2024-11-08 18:54:01,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 188 transitions, 960 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:54:01,013 INFO L231 Difference]: Finished difference. Result has 109 places, 109 transitions, 469 flow [2024-11-08 18:54:01,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=109, PETRI_TRANSITIONS=109} [2024-11-08 18:54:01,014 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 19 predicate places. [2024-11-08 18:54:01,014 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 109 transitions, 469 flow [2024-11-08 18:54:01,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:01,014 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:54:01,014 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:54:01,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 18:54:01,015 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:54:01,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:54:01,015 INFO L85 PathProgramCache]: Analyzing trace with hash 669687656, now seen corresponding path program 1 times [2024-11-08 18:54:01,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:54:01,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670697751] [2024-11-08 18:54:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:01,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:54:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:01,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:01,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:54:01,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670697751] [2024-11-08 18:54:01,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670697751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:54:01,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:54:01,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 18:54:01,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627860635] [2024-11-08 18:54:01,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:54:01,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 18:54:01,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:54:01,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 18:54:01,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-08 18:54:01,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 96 [2024-11-08 18:54:01,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 109 transitions, 469 flow. Second operand has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:01,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:54:01,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 96 [2024-11-08 18:54:01,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:54:09,354 INFO L124 PetriNetUnfolderBase]: 44701/64296 cut-off events. [2024-11-08 18:54:09,355 INFO L125 PetriNetUnfolderBase]: For 14965/21721 co-relation queries the response was YES. [2024-11-08 18:54:09,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156818 conditions, 64296 events. 44701/64296 cut-off events. For 14965/21721 co-relation queries the response was YES. Maximal size of possible extension queue 4438. Compared 534624 event pairs, 21491 based on Foata normal form. 317/41578 useless extension candidates. Maximal degree in co-relation 145073. Up to 30168 conditions per place. [2024-11-08 18:54:09,967 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 131 selfloop transitions, 14 changer transitions 0/180 dead transitions. [2024-11-08 18:54:09,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 180 transitions, 977 flow [2024-11-08 18:54:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 18:54:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 18:54:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 397 transitions. [2024-11-08 18:54:09,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5907738095238095 [2024-11-08 18:54:09,970 INFO L175 Difference]: Start difference. First operand has 109 places, 109 transitions, 469 flow. Second operand 7 states and 397 transitions. [2024-11-08 18:54:09,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 180 transitions, 977 flow [2024-11-08 18:54:09,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 180 transitions, 974 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 18:54:09,995 INFO L231 Difference]: Finished difference. Result has 117 places, 111 transitions, 521 flow [2024-11-08 18:54:09,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=521, PETRI_PLACES=117, PETRI_TRANSITIONS=111} [2024-11-08 18:54:09,996 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 27 predicate places. [2024-11-08 18:54:09,996 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 111 transitions, 521 flow [2024-11-08 18:54:09,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.666666666666664) internal successors, (250), 6 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:09,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:54:09,997 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:54:09,997 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-08 18:54:09,997 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:54:09,998 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:54:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash 495656287, now seen corresponding path program 1 times [2024-11-08 18:54:09,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:54:09,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290131387] [2024-11-08 18:54:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:09,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:54:10,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:10,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:54:10,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290131387] [2024-11-08 18:54:10,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290131387] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:54:10,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925059602] [2024-11-08 18:54:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:10,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:54:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:54:10,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:54:10,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 18:54:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:10,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:54:10,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:54:10,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:10,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:54:10,812 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 29 treesize of output 25 [2024-11-08 18:54:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:10,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925059602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:54:10,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:54:10,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-08 18:54:10,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626641266] [2024-11-08 18:54:10,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:54:10,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:54:10,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:54:10,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:54:10,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:54:11,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2024-11-08 18:54:11,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 111 transitions, 521 flow. Second operand has 13 states, 13 states have (on average 50.76923076923077) internal successors, (660), 13 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:11,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:54:11,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2024-11-08 18:54:11,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:54:15,902 INFO L124 PetriNetUnfolderBase]: 24002/37516 cut-off events. [2024-11-08 18:54:15,902 INFO L125 PetriNetUnfolderBase]: For 12742/12742 co-relation queries the response was YES. [2024-11-08 18:54:16,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91711 conditions, 37516 events. 24002/37516 cut-off events. For 12742/12742 co-relation queries the response was YES. Maximal size of possible extension queue 2630. Compared 328950 event pairs, 10607 based on Foata normal form. 0/24631 useless extension candidates. Maximal degree in co-relation 83957. Up to 15355 conditions per place. [2024-11-08 18:54:16,352 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 99 selfloop transitions, 18 changer transitions 0/166 dead transitions. [2024-11-08 18:54:16,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 166 transitions, 923 flow [2024-11-08 18:54:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:54:16,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:54:16,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2024-11-08 18:54:16,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6892361111111112 [2024-11-08 18:54:16,354 INFO L175 Difference]: Start difference. First operand has 117 places, 111 transitions, 521 flow. Second operand 6 states and 397 transitions. [2024-11-08 18:54:16,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 166 transitions, 923 flow [2024-11-08 18:54:16,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 166 transitions, 908 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:54:16,380 INFO L231 Difference]: Finished difference. Result has 120 places, 111 transitions, 550 flow [2024-11-08 18:54:16,380 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=550, PETRI_PLACES=120, PETRI_TRANSITIONS=111} [2024-11-08 18:54:16,381 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 30 predicate places. [2024-11-08 18:54:16,381 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 111 transitions, 550 flow [2024-11-08 18:54:16,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 50.76923076923077) internal successors, (660), 13 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:16,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:54:16,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:54:16,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 18:54:16,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 18:54:16,582 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:54:16,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:54:16,582 INFO L85 PathProgramCache]: Analyzing trace with hash 495656284, now seen corresponding path program 1 times [2024-11-08 18:54:16,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:54:16,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881983192] [2024-11-08 18:54:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:16,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:54:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:16,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:54:16,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881983192] [2024-11-08 18:54:16,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881983192] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:54:16,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 18:54:16,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 18:54:16,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693938589] [2024-11-08 18:54:16,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:54:16,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 18:54:16,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:54:16,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 18:54:16,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 18:54:16,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-08 18:54:16,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 111 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:16,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:54:16,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-08 18:54:16,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:54:19,965 INFO L124 PetriNetUnfolderBase]: 16048/24955 cut-off events. [2024-11-08 18:54:19,966 INFO L125 PetriNetUnfolderBase]: For 13075/13075 co-relation queries the response was YES. [2024-11-08 18:54:20,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61676 conditions, 24955 events. 16048/24955 cut-off events. For 13075/13075 co-relation queries the response was YES. Maximal size of possible extension queue 1653. Compared 212964 event pairs, 13987 based on Foata normal form. 0/17363 useless extension candidates. Maximal degree in co-relation 53971. Up to 20833 conditions per place. [2024-11-08 18:54:20,174 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 50 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-11-08 18:54:20,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 109 transitions, 662 flow [2024-11-08 18:54:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 18:54:20,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 18:54:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 271 transitions. [2024-11-08 18:54:20,175 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5645833333333333 [2024-11-08 18:54:20,175 INFO L175 Difference]: Start difference. First operand has 120 places, 111 transitions, 550 flow. Second operand 5 states and 271 transitions. [2024-11-08 18:54:20,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 109 transitions, 662 flow [2024-11-08 18:54:20,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 109 transitions, 623 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 18:54:20,183 INFO L231 Difference]: Finished difference. Result has 118 places, 109 transitions, 523 flow [2024-11-08 18:54:20,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=523, PETRI_PLACES=118, PETRI_TRANSITIONS=109} [2024-11-08 18:54:20,184 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 28 predicate places. [2024-11-08 18:54:20,184 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 109 transitions, 523 flow [2024-11-08 18:54:20,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:20,185 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:54:20,185 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 18:54:20,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-08 18:54:20,185 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:54:20,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:54:20,185 INFO L85 PathProgramCache]: Analyzing trace with hash 495656285, now seen corresponding path program 1 times [2024-11-08 18:54:20,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:54:20,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005225398] [2024-11-08 18:54:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:54:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:54:20,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:54:20,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005225398] [2024-11-08 18:54:20,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005225398] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:54:20,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553317880] [2024-11-08 18:54:20,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:20,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:54:20,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:54:20,702 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:54:20,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 18:54:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:20,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-08 18:54:20,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:54:20,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:54:21,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 18:54:21,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 18:54:21,092 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-08 18:54:21,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-08 18:54:21,162 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:54:21,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-08 18:54:21,181 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:54:21,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:54:21,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:54:21,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:54:22,085 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 125 treesize of output 121 [2024-11-08 18:54:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 18:54:22,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553317880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:54:22,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:54:22,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2024-11-08 18:54:22,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667261406] [2024-11-08 18:54:22,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:54:22,800 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 18:54:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:54:22,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 18:54:22,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2024-11-08 18:54:23,203 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 96 [2024-11-08 18:54:23,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 109 transitions, 523 flow. Second operand has 20 states, 20 states have (on average 36.25) internal successors, (725), 20 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:23,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:54:23,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 96 [2024-11-08 18:54:23,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:54:24,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-11-08 18:54:35,904 INFO L124 PetriNetUnfolderBase]: 20860/34811 cut-off events. [2024-11-08 18:54:35,904 INFO L125 PetriNetUnfolderBase]: For 16403/16403 co-relation queries the response was YES. [2024-11-08 18:54:36,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79944 conditions, 34811 events. 20860/34811 cut-off events. For 16403/16403 co-relation queries the response was YES. Maximal size of possible extension queue 1880. Compared 314861 event pairs, 10961 based on Foata normal form. 1810/27821 useless extension candidates. Maximal degree in co-relation 41968. Up to 11601 conditions per place. [2024-11-08 18:54:36,255 INFO L140 encePairwiseOnDemand]: 80/96 looper letters, 165 selfloop transitions, 55 changer transitions 0/251 dead transitions. [2024-11-08 18:54:36,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 251 transitions, 1540 flow [2024-11-08 18:54:36,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-08 18:54:36,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-08 18:54:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1050 transitions. [2024-11-08 18:54:36,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-08 18:54:36,260 INFO L175 Difference]: Start difference. First operand has 118 places, 109 transitions, 523 flow. Second operand 25 states and 1050 transitions. [2024-11-08 18:54:36,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 251 transitions, 1540 flow [2024-11-08 18:54:36,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 251 transitions, 1518 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 18:54:36,285 INFO L231 Difference]: Finished difference. Result has 148 places, 141 transitions, 945 flow [2024-11-08 18:54:36,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=945, PETRI_PLACES=148, PETRI_TRANSITIONS=141} [2024-11-08 18:54:36,286 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 58 predicate places. [2024-11-08 18:54:36,287 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 141 transitions, 945 flow [2024-11-08 18:54:36,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 36.25) internal successors, (725), 20 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:36,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:54:36,290 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] [2024-11-08 18:54:36,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 18:54:36,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 18:54:36,491 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:54:36,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:54:36,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1410206743, now seen corresponding path program 1 times [2024-11-08 18:54:36,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:54:36,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178147708] [2024-11-08 18:54:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:36,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:54:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:36,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:54:36,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178147708] [2024-11-08 18:54:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178147708] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:54:36,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006156297] [2024-11-08 18:54:36,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:36,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:54:36,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:54:36,935 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:54:36,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 18:54:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:37,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-08 18:54:37,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:54:37,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 18:54:37,244 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 18:54:37,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-08 18:54:37,264 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 18:54:37,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 18:54:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:37,408 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 18:54:37,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006156297] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 18:54:37,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 18:54:37,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 10 [2024-11-08 18:54:37,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005379697] [2024-11-08 18:54:37,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 18:54:37,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 18:54:37,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:54:37,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 18:54:37,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-08 18:54:37,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2024-11-08 18:54:37,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 141 transitions, 945 flow. Second operand has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:37,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:54:37,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2024-11-08 18:54:37,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 18:54:40,845 INFO L124 PetriNetUnfolderBase]: 14366/23219 cut-off events. [2024-11-08 18:54:40,846 INFO L125 PetriNetUnfolderBase]: For 20044/20044 co-relation queries the response was YES. [2024-11-08 18:54:41,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58179 conditions, 23219 events. 14366/23219 cut-off events. For 20044/20044 co-relation queries the response was YES. Maximal size of possible extension queue 1267. Compared 198942 event pairs, 10923 based on Foata normal form. 0/18092 useless extension candidates. Maximal degree in co-relation 57999. Up to 18511 conditions per place. [2024-11-08 18:54:41,337 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 59 selfloop transitions, 34 changer transitions 0/139 dead transitions. [2024-11-08 18:54:41,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 139 transitions, 1123 flow [2024-11-08 18:54:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 18:54:41,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 18:54:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 283 transitions. [2024-11-08 18:54:41,339 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4913194444444444 [2024-11-08 18:54:41,339 INFO L175 Difference]: Start difference. First operand has 148 places, 141 transitions, 945 flow. Second operand 6 states and 283 transitions. [2024-11-08 18:54:41,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 139 transitions, 1123 flow [2024-11-08 18:54:41,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 139 transitions, 1101 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-08 18:54:41,372 INFO L231 Difference]: Finished difference. Result has 148 places, 139 transitions, 983 flow [2024-11-08 18:54:41,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=983, PETRI_PLACES=148, PETRI_TRANSITIONS=139} [2024-11-08 18:54:41,373 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 58 predicate places. [2024-11-08 18:54:41,373 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 139 transitions, 983 flow [2024-11-08 18:54:41,374 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 42.142857142857146) internal successors, (295), 7 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:41,374 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 18:54:41,374 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] [2024-11-08 18:54:41,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 18:54:41,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:54:41,575 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-08 18:54:41,575 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 18:54:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1410206745, now seen corresponding path program 1 times [2024-11-08 18:54:41,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 18:54:41,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526310902] [2024-11-08 18:54:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:41,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 18:54:41,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:41,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 18:54:41,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526310902] [2024-11-08 18:54:41,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526310902] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 18:54:41,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120974456] [2024-11-08 18:54:41,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 18:54:41,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 18:54:41,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 18:54:41,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 18:54:41,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_08abca3c-fd00-4c47-8a1b-6f1e3c84709c/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 18:54:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 18:54:41,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 18:54:41,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 18:54:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:42,156 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 18:54:42,254 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 29 treesize of output 25 [2024-11-08 18:54:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 18:54:42,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120974456] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 18:54:42,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 18:54:42,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-08 18:54:42,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686133009] [2024-11-08 18:54:42,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 18:54:42,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 18:54:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 18:54:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 18:54:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-08 18:54:42,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 96 [2024-11-08 18:54:42,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 139 transitions, 983 flow. Second operand has 13 states, 13 states have (on average 51.23076923076923) internal successors, (666), 13 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 18:54:42,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 18:54:42,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 96 [2024-11-08 18:54:42,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand