./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-channel-sum.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_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/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_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/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_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/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 bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:09:09,766 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:09:09,882 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:09:09,889 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:09:09,891 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:09:09,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:09:09,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:09:09,941 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:09:09,942 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:09:09,942 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:09:09,944 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:09:09,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:09:09,945 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:09:09,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:09:09,950 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:09:09,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:09:09,951 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:09:09,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:09:09,952 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:09:09,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:09:09,952 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:09:09,957 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:09:09,957 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:09:09,958 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:09:09,958 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:09:09,958 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:09:09,959 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:09:09,959 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:09:09,959 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:09:09,960 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:09:09,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:09:09,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:09:09,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:09:09,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:09:09,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:09:09,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:09:09,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:09:09,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:09:09,966 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:09:09,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:09:09,967 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:09:09,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:09:09,967 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_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bc55f480d2dabcba35697f502078f181c178ae095f610e1cdbc5d03f14d18670 [2024-11-08 17:09:10,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:09:10,309 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:09:10,312 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:09:10,314 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:09:10,314 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:09:10,316 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c Unable to find full path for "g++" [2024-11-08 17:09:12,754 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:09:12,986 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:09:12,986 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-11-08 17:09:12,997 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/data/675bb7c26/b8f921a152dd4ac694cf80fda1b07591/FLAG06c396603 [2024-11-08 17:09:13,013 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/data/675bb7c26/b8f921a152dd4ac694cf80fda1b07591 [2024-11-08 17:09:13,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:09:13,018 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:09:13,020 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:09:13,020 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:09:13,027 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:09:13,028 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,030 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@248d28d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13, skipping insertion in model container [2024-11-08 17:09:13,030 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,060 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:09:13,330 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-08 17:09:13,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:09:13,349 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:09:13,390 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:09:13,416 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:09:13,417 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13 WrapperNode [2024-11-08 17:09:13,417 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:09:13,418 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:09:13,418 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:09:13,418 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:09:13,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,434 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,465 INFO L138 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 134 [2024-11-08 17:09:13,465 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:09:13,466 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:09:13,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:09:13,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:09:13,481 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,485 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,504 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-08 17:09:13,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,535 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,539 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:09:13,540 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:09:13,540 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:09:13,540 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:09:13,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (1/1) ... [2024-11-08 17:09:13,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:09:13,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:13,591 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:09:13,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:09:13,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:09:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:09:13,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:09:13,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:09:13,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:09:13,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:09:13,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:09:13,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:09:13,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:09:13,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:09:13,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:09:13,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:09:13,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:09:13,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:09:13,658 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-08 17:09:13,840 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:09:13,843 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:09:14,328 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:09:14,328 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:09:14,612 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:09:14,614 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 17:09:14,615 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:09:14 BoogieIcfgContainer [2024-11-08 17:09:14,616 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:09:14,619 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:09:14,620 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:09:14,625 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:09:14,625 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:09:13" (1/3) ... [2024-11-08 17:09:14,626 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380ad7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:09:14, skipping insertion in model container [2024-11-08 17:09:14,627 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:09:13" (2/3) ... [2024-11-08 17:09:14,627 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380ad7c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:09:14, skipping insertion in model container [2024-11-08 17:09:14,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:09:14" (3/3) ... [2024-11-08 17:09:14,629 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-11-08 17:09:14,653 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:09:14,653 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-08 17:09:14,653 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:09:14,738 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-08 17:09:14,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 56 transitions, 126 flow [2024-11-08 17:09:14,831 INFO L124 PetriNetUnfolderBase]: 7/54 cut-off events. [2024-11-08 17:09:14,833 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-08 17:09:14,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 54 events. 7/54 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 106 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-08 17:09:14,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 56 transitions, 126 flow [2024-11-08 17:09:14,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 53 transitions, 118 flow [2024-11-08 17:09:14,861 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:09:14,873 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;@388d6a31, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:09:14,874 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-08 17:09:14,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:09:14,887 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2024-11-08 17:09:14,887 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:09:14,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:14,888 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:14,889 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:14,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:14,899 INFO L85 PathProgramCache]: Analyzing trace with hash 823521285, now seen corresponding path program 1 times [2024-11-08 17:09:14,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:14,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810798186] [2024-11-08 17:09:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:14,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:15,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:15,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810798186] [2024-11-08 17:09:15,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810798186] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:15,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:15,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:09:15,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677285967] [2024-11-08 17:09:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:15,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:09:15,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:15,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:09:15,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:09:15,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 56 [2024-11-08 17:09:15,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:15,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:15,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 56 [2024-11-08 17:09:15,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:15,647 INFO L124 PetriNetUnfolderBase]: 256/510 cut-off events. [2024-11-08 17:09:15,647 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-08 17:09:15,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 897 conditions, 510 events. 256/510 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2446 event pairs, 167 based on Foata normal form. 1/446 useless extension candidates. Maximal degree in co-relation 815. Up to 356 conditions per place. [2024-11-08 17:09:15,660 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 24 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-11-08 17:09:15,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 49 transitions, 162 flow [2024-11-08 17:09:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:09:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:09:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-08 17:09:15,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-11-08 17:09:15,684 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 118 flow. Second operand 3 states and 107 transitions. [2024-11-08 17:09:15,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 49 transitions, 162 flow [2024-11-08 17:09:15,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 154 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:09:15,695 INFO L231 Difference]: Finished difference. Result has 48 places, 49 transitions, 106 flow [2024-11-08 17:09:15,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=48, PETRI_TRANSITIONS=49} [2024-11-08 17:09:15,706 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -5 predicate places. [2024-11-08 17:09:15,706 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 49 transitions, 106 flow [2024-11-08 17:09:15,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:15,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:15,707 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:15,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:09:15,708 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:15,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:15,709 INFO L85 PathProgramCache]: Analyzing trace with hash 823521286, now seen corresponding path program 1 times [2024-11-08 17:09:15,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:15,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437832072] [2024-11-08 17:09:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:15,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:16,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:16,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437832072] [2024-11-08 17:09:16,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437832072] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:16,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:16,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:09:16,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169707313] [2024-11-08 17:09:16,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:16,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:09:16,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:16,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:09:16,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:09:16,405 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-08 17:09:16,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 49 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:16,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:16,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-08 17:09:16,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:16,661 INFO L124 PetriNetUnfolderBase]: 257/515 cut-off events. [2024-11-08 17:09:16,662 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-08 17:09:16,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 895 conditions, 515 events. 257/515 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2465 event pairs, 167 based on Foata normal form. 0/447 useless extension candidates. Maximal degree in co-relation 858. Up to 364 conditions per place. [2024-11-08 17:09:16,670 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 31 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-08 17:09:16,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 54 transitions, 188 flow [2024-11-08 17:09:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:09:16,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:09:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-11-08 17:09:16,673 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5758928571428571 [2024-11-08 17:09:16,673 INFO L175 Difference]: Start difference. First operand has 48 places, 49 transitions, 106 flow. Second operand 4 states and 129 transitions. [2024-11-08 17:09:16,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 54 transitions, 188 flow [2024-11-08 17:09:16,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:09:16,677 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 131 flow [2024-11-08 17:09:16,677 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2024-11-08 17:09:16,678 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2024-11-08 17:09:16,678 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 131 flow [2024-11-08 17:09:16,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:16,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:16,679 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:16,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:09:16,680 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:16,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash 669857752, now seen corresponding path program 1 times [2024-11-08 17:09:16,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:16,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029659480] [2024-11-08 17:09:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:17,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:17,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029659480] [2024-11-08 17:09:17,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029659480] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:17,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53171930] [2024-11-08 17:09:17,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:17,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:17,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:17,222 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:17,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:09:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:17,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:09:17,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:17,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 17:09:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:17,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:18,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53171930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:09:18,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:09:18,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 11 [2024-11-08 17:09:18,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336733100] [2024-11-08 17:09:18,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:09:18,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:09:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:18,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:09:18,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:09:18,435 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-08 17:09:18,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 131 flow. Second operand has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:18,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:18,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-08 17:09:18,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:19,084 INFO L124 PetriNetUnfolderBase]: 258/520 cut-off events. [2024-11-08 17:09:19,085 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-08 17:09:19,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 520 events. 258/520 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2495 event pairs, 167 based on Foata normal form. 1/457 useless extension candidates. Maximal degree in co-relation 872. Up to 359 conditions per place. [2024-11-08 17:09:19,090 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 29 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-11-08 17:09:19,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 59 transitions, 231 flow [2024-11-08 17:09:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 17:09:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-08 17:09:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-11-08 17:09:19,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5066964285714286 [2024-11-08 17:09:19,094 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 131 flow. Second operand 8 states and 227 transitions. [2024-11-08 17:09:19,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 59 transitions, 231 flow [2024-11-08 17:09:19,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:09:19,100 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 166 flow [2024-11-08 17:09:19,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-11-08 17:09:19,103 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-11-08 17:09:19,103 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 166 flow [2024-11-08 17:09:19,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.833333333333332) internal successors, (298), 12 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:19,104 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:19,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:19,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 17:09:19,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:19,309 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:19,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1510990651, now seen corresponding path program 1 times [2024-11-08 17:09:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:19,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136595900] [2024-11-08 17:09:19,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:19,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136595900] [2024-11-08 17:09:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136595900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:19,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:19,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:09:19,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174652584] [2024-11-08 17:09:19,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:19,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:09:19,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:19,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:09:19,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:09:19,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-08 17:09:19,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:19,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:19,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-08 17:09:19,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:19,552 INFO L124 PetriNetUnfolderBase]: 324/697 cut-off events. [2024-11-08 17:09:19,552 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-08 17:09:19,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 697 events. 324/697 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3441 event pairs, 126 based on Foata normal form. 0/559 useless extension candidates. Maximal degree in co-relation 1235. Up to 338 conditions per place. [2024-11-08 17:09:19,558 INFO L140 encePairwiseOnDemand]: 48/56 looper letters, 43 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2024-11-08 17:09:19,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 296 flow [2024-11-08 17:09:19,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:09:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:09:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-08 17:09:19,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-08 17:09:19,560 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 166 flow. Second operand 3 states and 112 transitions. [2024-11-08 17:09:19,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 296 flow [2024-11-08 17:09:19,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 271 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-08 17:09:19,564 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 183 flow [2024-11-08 17:09:19,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=183, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-11-08 17:09:19,565 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-11-08 17:09:19,566 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 183 flow [2024-11-08 17:09:19,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:19,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:19,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:19,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 17:09:19,567 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:19,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -449242741, now seen corresponding path program 1 times [2024-11-08 17:09:19,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:19,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739853357] [2024-11-08 17:09:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:19,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:19,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739853357] [2024-11-08 17:09:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739853357] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:19,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:19,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:09:19,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659996941] [2024-11-08 17:09:19,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:19,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:09:19,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:19,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:09:19,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:09:19,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-08 17:09:19,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 183 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:19,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:19,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-08 17:09:19,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:19,847 INFO L124 PetriNetUnfolderBase]: 288/590 cut-off events. [2024-11-08 17:09:19,848 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2024-11-08 17:09:19,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1231 conditions, 590 events. 288/590 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2627 event pairs, 168 based on Foata normal form. 0/549 useless extension candidates. Maximal degree in co-relation 1201. Up to 431 conditions per place. [2024-11-08 17:09:19,852 INFO L140 encePairwiseOnDemand]: 51/56 looper letters, 28 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-11-08 17:09:19,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 243 flow [2024-11-08 17:09:19,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:09:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:09:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-11-08 17:09:19,855 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5401785714285714 [2024-11-08 17:09:19,855 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 183 flow. Second operand 4 states and 121 transitions. [2024-11-08 17:09:19,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 243 flow [2024-11-08 17:09:19,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 229 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:09:19,859 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 173 flow [2024-11-08 17:09:19,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-11-08 17:09:19,862 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2024-11-08 17:09:19,862 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 173 flow [2024-11-08 17:09:19,862 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:19,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:19,867 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:19,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 17:09:19,867 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:19,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:19,868 INFO L85 PathProgramCache]: Analyzing trace with hash -449242740, now seen corresponding path program 1 times [2024-11-08 17:09:19,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:19,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125332052] [2024-11-08 17:09:19,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:19,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:19,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:19,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125332052] [2024-11-08 17:09:19,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125332052] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:19,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:19,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:09:19,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757617911] [2024-11-08 17:09:19,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:19,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:09:19,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:09:19,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:09:20,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-08 17:09:20,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 173 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:20,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:20,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-08 17:09:20,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:20,226 INFO L124 PetriNetUnfolderBase]: 310/647 cut-off events. [2024-11-08 17:09:20,226 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-08 17:09:20,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 647 events. 310/647 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2975 event pairs, 191 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 1260. Up to 439 conditions per place. [2024-11-08 17:09:20,232 INFO L140 encePairwiseOnDemand]: 50/56 looper letters, 44 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-08 17:09:20,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 303 flow [2024-11-08 17:09:20,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:09:20,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:09:20,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-11-08 17:09:20,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-08 17:09:20,234 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 173 flow. Second operand 5 states and 170 transitions. [2024-11-08 17:09:20,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 303 flow [2024-11-08 17:09:20,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 297 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:09:20,238 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 189 flow [2024-11-08 17:09:20,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-11-08 17:09:20,239 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2024-11-08 17:09:20,239 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 189 flow [2024-11-08 17:09:20,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:20,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:20,240 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 17:09:20,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 17:09:20,240 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:20,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:20,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2002075270, now seen corresponding path program 1 times [2024-11-08 17:09:20,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:20,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687073107] [2024-11-08 17:09:20,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:20,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:20,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:09:20,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:20,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687073107] [2024-11-08 17:09:20,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687073107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:20,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:20,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:09:20,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908972321] [2024-11-08 17:09:20,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:20,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:09:20,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:09:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:09:20,337 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 56 [2024-11-08 17:09:20,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:20,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:20,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 56 [2024-11-08 17:09:20,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:20,545 INFO L124 PetriNetUnfolderBase]: 349/750 cut-off events. [2024-11-08 17:09:20,546 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-11-08 17:09:20,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1498 conditions, 750 events. 349/750 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3907 event pairs, 141 based on Foata normal form. 5/733 useless extension candidates. Maximal degree in co-relation 1463. Up to 467 conditions per place. [2024-11-08 17:09:20,553 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 49 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2024-11-08 17:09:20,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 329 flow [2024-11-08 17:09:20,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:09:20,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:09:20,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-11-08 17:09:20,555 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2024-11-08 17:09:20,556 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 189 flow. Second operand 3 states and 120 transitions. [2024-11-08 17:09:20,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 329 flow [2024-11-08 17:09:20,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 72 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:09:20,563 INFO L231 Difference]: Finished difference. Result has 60 places, 57 transitions, 196 flow [2024-11-08 17:09:20,563 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=60, PETRI_TRANSITIONS=57} [2024-11-08 17:09:20,564 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-11-08 17:09:20,564 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 57 transitions, 196 flow [2024-11-08 17:09:20,564 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:20,564 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:20,564 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 17:09:20,565 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 17:09:20,565 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:20,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2002075304, now seen corresponding path program 1 times [2024-11-08 17:09:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:20,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092528282] [2024-11-08 17:09:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:20,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:20,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:20,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092528282] [2024-11-08 17:09:20,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092528282] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:20,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043295321] [2024-11-08 17:09:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:20,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:20,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:20,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:20,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:09:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:21,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:09:21,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:21,321 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:09:21,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043295321] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:21,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:09:21,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2024-11-08 17:09:21,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88914322] [2024-11-08 17:09:21,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:21,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:09:21,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:21,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:09:21,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:09:21,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-08 17:09:21,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:21,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:21,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-08 17:09:21,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:21,835 INFO L124 PetriNetUnfolderBase]: 324/687 cut-off events. [2024-11-08 17:09:21,836 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-08 17:09:21,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1447 conditions, 687 events. 324/687 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3447 event pairs, 165 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 1409. Up to 373 conditions per place. [2024-11-08 17:09:21,842 INFO L140 encePairwiseOnDemand]: 49/56 looper letters, 34 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-11-08 17:09:21,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 62 transitions, 295 flow [2024-11-08 17:09:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:09:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:09:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-11-08 17:09:21,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-11-08 17:09:21,844 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 196 flow. Second operand 5 states and 148 transitions. [2024-11-08 17:09:21,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 62 transitions, 295 flow [2024-11-08 17:09:21,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 62 transitions, 293 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:09:21,847 INFO L231 Difference]: Finished difference. Result has 61 places, 55 transitions, 210 flow [2024-11-08 17:09:21,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=55} [2024-11-08 17:09:21,849 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 8 predicate places. [2024-11-08 17:09:21,849 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 55 transitions, 210 flow [2024-11-08 17:09:21,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 7 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:21,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:21,850 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:21,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:09:22,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:22,054 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:22,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:22,055 INFO L85 PathProgramCache]: Analyzing trace with hash -434643216, now seen corresponding path program 1 times [2024-11-08 17:09:22,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:22,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764431993] [2024-11-08 17:09:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:22,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:22,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:22,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:22,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764431993] [2024-11-08 17:09:22,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764431993] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:22,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:22,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 17:09:22,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302017612] [2024-11-08 17:09:22,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:22,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:09:22,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:09:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:09:22,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 56 [2024-11-08 17:09:22,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 55 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:22,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:22,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 56 [2024-11-08 17:09:22,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:22,413 INFO L124 PetriNetUnfolderBase]: 471/1005 cut-off events. [2024-11-08 17:09:22,414 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2024-11-08 17:09:22,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2213 conditions, 1005 events. 471/1005 cut-off events. For 309/309 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5134 event pairs, 240 based on Foata normal form. 4/975 useless extension candidates. Maximal degree in co-relation 2175. Up to 454 conditions per place. [2024-11-08 17:09:22,421 INFO L140 encePairwiseOnDemand]: 53/56 looper letters, 46 selfloop transitions, 2 changer transitions 4/73 dead transitions. [2024-11-08 17:09:22,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 370 flow [2024-11-08 17:09:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:09:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:09:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-08 17:09:22,423 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7380952380952381 [2024-11-08 17:09:22,423 INFO L175 Difference]: Start difference. First operand has 61 places, 55 transitions, 210 flow. Second operand 3 states and 124 transitions. [2024-11-08 17:09:22,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 370 flow [2024-11-08 17:09:22,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 73 transitions, 340 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:09:22,427 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 191 flow [2024-11-08 17:09:22,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-11-08 17:09:22,428 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2024-11-08 17:09:22,429 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 191 flow [2024-11-08 17:09:22,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:22,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:22,429 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:22,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-08 17:09:22,431 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:22,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:22,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1510562472, now seen corresponding path program 1 times [2024-11-08 17:09:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:22,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406868884] [2024-11-08 17:09:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:22,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:09:22,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:22,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406868884] [2024-11-08 17:09:22,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406868884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:22,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:22,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-08 17:09:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339954130] [2024-11-08 17:09:22,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:22,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 17:09:22,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:22,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 17:09:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-08 17:09:22,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 56 [2024-11-08 17:09:22,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:22,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:22,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 56 [2024-11-08 17:09:22,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:23,195 INFO L124 PetriNetUnfolderBase]: 623/1237 cut-off events. [2024-11-08 17:09:23,195 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2024-11-08 17:09:23,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2693 conditions, 1237 events. 623/1237 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6314 event pairs, 110 based on Foata normal form. 0/1213 useless extension candidates. Maximal degree in co-relation 2656. Up to 332 conditions per place. [2024-11-08 17:09:23,204 INFO L140 encePairwiseOnDemand]: 46/56 looper letters, 69 selfloop transitions, 12 changer transitions 7/105 dead transitions. [2024-11-08 17:09:23,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 105 transitions, 507 flow [2024-11-08 17:09:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:09:23,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:09:23,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 239 transitions. [2024-11-08 17:09:23,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6096938775510204 [2024-11-08 17:09:23,206 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 191 flow. Second operand 7 states and 239 transitions. [2024-11-08 17:09:23,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 105 transitions, 507 flow [2024-11-08 17:09:23,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 105 transitions, 491 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-08 17:09:23,211 INFO L231 Difference]: Finished difference. Result has 66 places, 58 transitions, 241 flow [2024-11-08 17:09:23,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=66, PETRI_TRANSITIONS=58} [2024-11-08 17:09:23,213 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2024-11-08 17:09:23,213 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 58 transitions, 241 flow [2024-11-08 17:09:23,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:23,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:23,214 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:23,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 17:09:23,214 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:23,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:23,215 INFO L85 PathProgramCache]: Analyzing trace with hash -34367714, now seen corresponding path program 1 times [2024-11-08 17:09:23,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:23,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752390334] [2024-11-08 17:09:23,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:23,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:23,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:09:23,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:23,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752390334] [2024-11-08 17:09:23,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752390334] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:23,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800769480] [2024-11-08 17:09:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:23,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:23,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:23,605 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:23,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:09:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:23,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-08 17:09:23,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:09:23,811 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 17:09:23,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800769480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:23,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 17:09:23,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2024-11-08 17:09:23,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351134310] [2024-11-08 17:09:23,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:23,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:09:23,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:23,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:09:23,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:09:23,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 56 [2024-11-08 17:09:23,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:23,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:23,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 56 [2024-11-08 17:09:23,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:24,326 INFO L124 PetriNetUnfolderBase]: 1157/2250 cut-off events. [2024-11-08 17:09:24,327 INFO L125 PetriNetUnfolderBase]: For 728/728 co-relation queries the response was YES. [2024-11-08 17:09:24,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5268 conditions, 2250 events. 1157/2250 cut-off events. For 728/728 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 11663 event pairs, 352 based on Foata normal form. 18/2159 useless extension candidates. Maximal degree in co-relation 5227. Up to 717 conditions per place. [2024-11-08 17:09:24,343 INFO L140 encePairwiseOnDemand]: 47/56 looper letters, 67 selfloop transitions, 15 changer transitions 1/98 dead transitions. [2024-11-08 17:09:24,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 543 flow [2024-11-08 17:09:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:09:24,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:09:24,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-08 17:09:24,345 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6919642857142857 [2024-11-08 17:09:24,345 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 241 flow. Second operand 4 states and 155 transitions. [2024-11-08 17:09:24,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 543 flow [2024-11-08 17:09:24,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 98 transitions, 539 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:09:24,349 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 337 flow [2024-11-08 17:09:24,349 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=337, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-11-08 17:09:24,350 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 17 predicate places. [2024-11-08 17:09:24,350 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 337 flow [2024-11-08 17:09:24,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:24,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:24,351 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:24,375 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:09:24,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 17:09:24,555 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:24,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1049435404, now seen corresponding path program 1 times [2024-11-08 17:09:24,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:24,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773743263] [2024-11-08 17:09:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:24,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:24,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:24,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 17:09:24,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:24,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773743263] [2024-11-08 17:09:24,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773743263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:24,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318904153] [2024-11-08 17:09:24,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:24,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:24,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:24,907 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:24,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:09:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:25,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-08 17:09:25,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:25,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:25,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318904153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:09:25,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:09:25,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-11-08 17:09:25,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368816172] [2024-11-08 17:09:25,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:09:25,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 17:09:25,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:25,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 17:09:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-11-08 17:09:26,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-08 17:09:26,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 337 flow. Second operand has 18 states, 18 states have (on average 22.5) internal successors, (405), 18 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:26,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:26,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-08 17:09:26,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:27,060 INFO L124 PetriNetUnfolderBase]: 1138/2259 cut-off events. [2024-11-08 17:09:27,060 INFO L125 PetriNetUnfolderBase]: For 1452/1508 co-relation queries the response was YES. [2024-11-08 17:09:27,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5807 conditions, 2259 events. 1138/2259 cut-off events. For 1452/1508 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 12385 event pairs, 791 based on Foata normal form. 12/2144 useless extension candidates. Maximal degree in co-relation 5301. Up to 1606 conditions per place. [2024-11-08 17:09:27,084 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 85 selfloop transitions, 17 changer transitions 4/122 dead transitions. [2024-11-08 17:09:27,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 122 transitions, 727 flow [2024-11-08 17:09:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-08 17:09:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-08 17:09:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 382 transitions. [2024-11-08 17:09:27,087 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-11-08 17:09:27,087 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 337 flow. Second operand 15 states and 382 transitions. [2024-11-08 17:09:27,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 122 transitions, 727 flow [2024-11-08 17:09:27,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 727 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:09:27,096 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 439 flow [2024-11-08 17:09:27,097 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=439, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-11-08 17:09:27,097 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 35 predicate places. [2024-11-08 17:09:27,098 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 439 flow [2024-11-08 17:09:27,098 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.5) internal successors, (405), 18 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:27,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:27,099 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:27,124 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:09:27,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:27,300 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:27,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:27,301 INFO L85 PathProgramCache]: Analyzing trace with hash -806512280, now seen corresponding path program 1 times [2024-11-08 17:09:27,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:27,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556904622] [2024-11-08 17:09:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:27,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:27,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:28,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556904622] [2024-11-08 17:09:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556904622] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867339192] [2024-11-08 17:09:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:28,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:28,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:28,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:28,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:09:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:28,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-08 17:09:28,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:28,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-08 17:09:28,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:28,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:29,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 61 treesize of output 55 [2024-11-08 17:09:29,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:09:29,698 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 78 treesize of output 68 [2024-11-08 17:09:30,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:30,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867339192] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:09:30,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:09:30,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 29 [2024-11-08 17:09:30,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746775964] [2024-11-08 17:09:30,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:09:30,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-08 17:09:30,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:30,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-08 17:09:30,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=681, Unknown=0, NotChecked=0, Total=870 [2024-11-08 17:09:30,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-08 17:09:30,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 439 flow. Second operand has 30 states, 30 states have (on average 21.7) internal successors, (651), 30 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:30,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:30,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-08 17:09:30,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:34,344 INFO L124 PetriNetUnfolderBase]: 1595/3081 cut-off events. [2024-11-08 17:09:34,345 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2024-11-08 17:09:34,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8469 conditions, 3081 events. 1595/3081 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 17558 event pairs, 256 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 7776. Up to 943 conditions per place. [2024-11-08 17:09:34,378 INFO L140 encePairwiseOnDemand]: 34/56 looper letters, 104 selfloop transitions, 53 changer transitions 131/298 dead transitions. [2024-11-08 17:09:34,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 298 transitions, 1919 flow [2024-11-08 17:09:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-08 17:09:34,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-08 17:09:34,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 893 transitions. [2024-11-08 17:09:34,383 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4690126050420168 [2024-11-08 17:09:34,383 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 439 flow. Second operand 34 states and 893 transitions. [2024-11-08 17:09:34,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 298 transitions, 1919 flow [2024-11-08 17:09:34,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 298 transitions, 1903 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-08 17:09:34,406 INFO L231 Difference]: Finished difference. Result has 130 places, 103 transitions, 828 flow [2024-11-08 17:09:34,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=828, PETRI_PLACES=130, PETRI_TRANSITIONS=103} [2024-11-08 17:09:34,410 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 77 predicate places. [2024-11-08 17:09:34,410 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 103 transitions, 828 flow [2024-11-08 17:09:34,411 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 21.7) internal successors, (651), 30 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:34,411 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:34,411 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:34,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:09:34,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:34,612 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:34,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 264330904, now seen corresponding path program 2 times [2024-11-08 17:09:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:34,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240736145] [2024-11-08 17:09:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:09:35,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:35,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240736145] [2024-11-08 17:09:35,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240736145] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:35,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104819852] [2024-11-08 17:09:35,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:09:35,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:35,274 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:35,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:09:35,389 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 17:09:35,389 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:09:35,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-08 17:09:35,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:35,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-08 17:09:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:09:36,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-08 17:09:36,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104819852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:09:36,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:09:36,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 19 [2024-11-08 17:09:36,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455700937] [2024-11-08 17:09:36,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:09:36,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 17:09:36,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:36,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 17:09:36,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-11-08 17:09:37,450 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 56 [2024-11-08 17:09:37,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 103 transitions, 828 flow. Second operand has 20 states, 20 states have (on average 19.85) internal successors, (397), 20 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:37,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:37,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 56 [2024-11-08 17:09:37,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:38,794 INFO L124 PetriNetUnfolderBase]: 1277/2524 cut-off events. [2024-11-08 17:09:38,794 INFO L125 PetriNetUnfolderBase]: For 5914/5914 co-relation queries the response was YES. [2024-11-08 17:09:38,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8551 conditions, 2524 events. 1277/2524 cut-off events. For 5914/5914 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 14135 event pairs, 105 based on Foata normal form. 52/2566 useless extension candidates. Maximal degree in co-relation 8466. Up to 542 conditions per place. [2024-11-08 17:09:38,827 INFO L140 encePairwiseOnDemand]: 45/56 looper letters, 89 selfloop transitions, 93 changer transitions 4/195 dead transitions. [2024-11-08 17:09:38,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 195 transitions, 1824 flow [2024-11-08 17:09:38,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:09:38,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 17:09:38,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 283 transitions. [2024-11-08 17:09:38,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4211309523809524 [2024-11-08 17:09:38,830 INFO L175 Difference]: Start difference. First operand has 130 places, 103 transitions, 828 flow. Second operand 12 states and 283 transitions. [2024-11-08 17:09:38,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 195 transitions, 1824 flow [2024-11-08 17:09:38,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 195 transitions, 1680 flow, removed 49 selfloop flow, removed 22 redundant places. [2024-11-08 17:09:38,859 INFO L231 Difference]: Finished difference. Result has 93 places, 142 transitions, 1292 flow [2024-11-08 17:09:38,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1292, PETRI_PLACES=93, PETRI_TRANSITIONS=142} [2024-11-08 17:09:38,860 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 40 predicate places. [2024-11-08 17:09:38,860 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 142 transitions, 1292 flow [2024-11-08 17:09:38,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.85) internal successors, (397), 20 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:38,861 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:38,861 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:38,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 17:09:39,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:39,066 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:39,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1591175086, now seen corresponding path program 2 times [2024-11-08 17:09:39,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:39,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546026380] [2024-11-08 17:09:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:39,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:40,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546026380] [2024-11-08 17:09:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546026380] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202806776] [2024-11-08 17:09:40,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:09:40,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:40,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:40,240 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:40,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:09:40,352 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:09:40,352 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:09:40,354 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:09:40,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:09:40,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:40,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:09:40,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 40 treesize of output 24 [2024-11-08 17:09:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:09:40,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202806776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:09:40,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:09:40,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 21 [2024-11-08 17:09:40,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633568262] [2024-11-08 17:09:40,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:09:40,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-08 17:09:40,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:40,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-08 17:09:40,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2024-11-08 17:09:41,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-08 17:09:41,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 142 transitions, 1292 flow. Second operand has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:41,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:41,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-08 17:09:41,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:43,525 INFO L124 PetriNetUnfolderBase]: 2466/4751 cut-off events. [2024-11-08 17:09:43,526 INFO L125 PetriNetUnfolderBase]: For 10725/10733 co-relation queries the response was YES. [2024-11-08 17:09:43,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 4751 events. 2466/4751 cut-off events. For 10725/10733 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 29269 event pairs, 550 based on Foata normal form. 17/4752 useless extension candidates. Maximal degree in co-relation 16005. Up to 1624 conditions per place. [2024-11-08 17:09:43,563 INFO L140 encePairwiseOnDemand]: 43/56 looper letters, 264 selfloop transitions, 33 changer transitions 29/335 dead transitions. [2024-11-08 17:09:43,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 335 transitions, 3478 flow [2024-11-08 17:09:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-08 17:09:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-08 17:09:43,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 471 transitions. [2024-11-08 17:09:43,566 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4947478991596639 [2024-11-08 17:09:43,566 INFO L175 Difference]: Start difference. First operand has 93 places, 142 transitions, 1292 flow. Second operand 17 states and 471 transitions. [2024-11-08 17:09:43,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 335 transitions, 3478 flow [2024-11-08 17:09:43,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 335 transitions, 3432 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-11-08 17:09:43,609 INFO L231 Difference]: Finished difference. Result has 109 places, 158 transitions, 1501 flow [2024-11-08 17:09:43,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1275, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1501, PETRI_PLACES=109, PETRI_TRANSITIONS=158} [2024-11-08 17:09:43,610 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 56 predicate places. [2024-11-08 17:09:43,611 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 158 transitions, 1501 flow [2024-11-08 17:09:43,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 23.0) internal successors, (506), 22 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:43,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:43,612 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:43,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:09:43,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-08 17:09:43,816 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:43,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash -459756664, now seen corresponding path program 3 times [2024-11-08 17:09:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:43,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107060607] [2024-11-08 17:09:43,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-08 17:09:44,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:44,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107060607] [2024-11-08 17:09:44,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107060607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:09:44,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:09:44,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:09:44,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393493688] [2024-11-08 17:09:44,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:09:44,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:09:44,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:44,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:09:44,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:09:44,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 56 [2024-11-08 17:09:44,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 158 transitions, 1501 flow. Second operand has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:44,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:44,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 56 [2024-11-08 17:09:44,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:09:45,381 INFO L124 PetriNetUnfolderBase]: 3538/6777 cut-off events. [2024-11-08 17:09:45,381 INFO L125 PetriNetUnfolderBase]: For 13325/13407 co-relation queries the response was YES. [2024-11-08 17:09:45,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22140 conditions, 6777 events. 3538/6777 cut-off events. For 13325/13407 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 44175 event pairs, 797 based on Foata normal form. 425/7146 useless extension candidates. Maximal degree in co-relation 19917. Up to 3184 conditions per place. [2024-11-08 17:09:45,444 INFO L140 encePairwiseOnDemand]: 52/56 looper letters, 165 selfloop transitions, 4 changer transitions 0/195 dead transitions. [2024-11-08 17:09:45,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 195 transitions, 2119 flow [2024-11-08 17:09:45,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:09:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:09:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 142 transitions. [2024-11-08 17:09:45,445 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-11-08 17:09:45,445 INFO L175 Difference]: Start difference. First operand has 109 places, 158 transitions, 1501 flow. Second operand 4 states and 142 transitions. [2024-11-08 17:09:45,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 195 transitions, 2119 flow [2024-11-08 17:09:45,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 195 transitions, 2080 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-08 17:09:45,483 INFO L231 Difference]: Finished difference. Result has 110 places, 158 transitions, 1484 flow [2024-11-08 17:09:45,484 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1461, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1484, PETRI_PLACES=110, PETRI_TRANSITIONS=158} [2024-11-08 17:09:45,486 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-11-08 17:09:45,486 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 158 transitions, 1484 flow [2024-11-08 17:09:45,487 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.25) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:45,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:09:45,489 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:09:45,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-08 17:09:45,490 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:09:45,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:09:45,491 INFO L85 PathProgramCache]: Analyzing trace with hash -2032783200, now seen corresponding path program 1 times [2024-11-08 17:09:45,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:09:45,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553263738] [2024-11-08 17:09:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:45,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:09:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:47,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:09:47,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553263738] [2024-11-08 17:09:47,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553263738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:09:47,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761814420] [2024-11-08 17:09:47,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:09:47,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:09:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:09:47,564 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:09:47,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:09:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:09:47,698 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 17:09:47,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:09:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:49,318 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:09:50,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:09:50,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-08 17:09:51,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:09:51,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761814420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:09:51,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:09:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 47 [2024-11-08 17:09:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804259404] [2024-11-08 17:09:51,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:09:51,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 17:09:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:09:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 17:09:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1916, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 17:09:53,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-08 17:09:53,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 158 transitions, 1484 flow. Second operand has 48 states, 48 states have (on average 21.541666666666668) internal successors, (1034), 48 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:09:53,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:09:53,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-08 17:09:53,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:10:40,569 INFO L124 PetriNetUnfolderBase]: 30824/61674 cut-off events. [2024-11-08 17:10:40,569 INFO L125 PetriNetUnfolderBase]: For 151665/151669 co-relation queries the response was YES. [2024-11-08 17:10:40,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208620 conditions, 61674 events. 30824/61674 cut-off events. For 151665/151669 co-relation queries the response was YES. Maximal size of possible extension queue 1197. Compared 593386 event pairs, 3849 based on Foata normal form. 549/62001 useless extension candidates. Maximal degree in co-relation 189740. Up to 10375 conditions per place. [2024-11-08 17:10:41,072 INFO L140 encePairwiseOnDemand]: 36/56 looper letters, 1342 selfloop transitions, 1400 changer transitions 946/3698 dead transitions. [2024-11-08 17:10:41,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 3698 transitions, 35095 flow [2024-11-08 17:10:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 297 states. [2024-11-08 17:10:41,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2024-11-08 17:10:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 8089 transitions. [2024-11-08 17:10:41,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48635161135161137 [2024-11-08 17:10:41,114 INFO L175 Difference]: Start difference. First operand has 110 places, 158 transitions, 1484 flow. Second operand 297 states and 8089 transitions. [2024-11-08 17:10:41,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 3698 transitions, 35095 flow [2024-11-08 17:10:41,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 3698 transitions, 35089 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-08 17:10:41,742 INFO L231 Difference]: Finished difference. Result has 549 places, 1625 transitions, 21464 flow [2024-11-08 17:10:41,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=1479, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=297, PETRI_FLOW=21464, PETRI_PLACES=549, PETRI_TRANSITIONS=1625} [2024-11-08 17:10:41,743 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 496 predicate places. [2024-11-08 17:10:41,743 INFO L471 AbstractCegarLoop]: Abstraction has has 549 places, 1625 transitions, 21464 flow [2024-11-08 17:10:41,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 21.541666666666668) internal successors, (1034), 48 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:10:41,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:10:41,745 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:10:41,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:10:41,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 17:10:41,946 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:10:41,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:10:41,947 INFO L85 PathProgramCache]: Analyzing trace with hash 2103989798, now seen corresponding path program 2 times [2024-11-08 17:10:41,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:10:41,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080897785] [2024-11-08 17:10:41,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:10:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:10:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:10:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:10:44,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:10:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080897785] [2024-11-08 17:10:44,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080897785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:10:44,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359074536] [2024-11-08 17:10:44,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:10:44,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:10:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:10:44,033 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:10:44,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:10:44,158 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:10:44,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:10:44,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 17:10:44,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:10:44,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-08 17:10:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:10:45,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:10:46,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 105 [2024-11-08 17:10:46,884 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:10:46,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 208 [2024-11-08 17:10:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:10:48,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359074536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:10:48,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:10:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 47 [2024-11-08 17:10:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611926360] [2024-11-08 17:10:48,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:10:48,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 17:10:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:10:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 17:10:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1981, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 17:10:50,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-08 17:10:50,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 1625 transitions, 21464 flow. Second operand has 48 states, 48 states have (on average 21.541666666666668) internal successors, (1034), 48 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:10:50,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:10:50,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-08 17:10:50,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:11:36,812 INFO L124 PetriNetUnfolderBase]: 15312/30482 cut-off events. [2024-11-08 17:11:36,812 INFO L125 PetriNetUnfolderBase]: For 1405150/1405154 co-relation queries the response was YES. [2024-11-08 17:11:37,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198417 conditions, 30482 events. 15312/30482 cut-off events. For 1405150/1405154 co-relation queries the response was YES. Maximal size of possible extension queue 714. Compared 266069 event pairs, 2205 based on Foata normal form. 285/30635 useless extension candidates. Maximal degree in co-relation 196246. Up to 6537 conditions per place. [2024-11-08 17:11:37,897 INFO L140 encePairwiseOnDemand]: 36/56 looper letters, 767 selfloop transitions, 983 changer transitions 375/2135 dead transitions. [2024-11-08 17:11:37,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 2135 transitions, 33246 flow [2024-11-08 17:11:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2024-11-08 17:11:37,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2024-11-08 17:11:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 4115 transitions. [2024-11-08 17:11:37,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4564108251996451 [2024-11-08 17:11:37,924 INFO L175 Difference]: Start difference. First operand has 549 places, 1625 transitions, 21464 flow. Second operand 161 states and 4115 transitions. [2024-11-08 17:11:37,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 2135 transitions, 33246 flow [2024-11-08 17:11:48,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 2135 transitions, 26086 flow, removed 3414 selfloop flow, removed 102 redundant places. [2024-11-08 17:11:48,868 INFO L231 Difference]: Finished difference. Result has 543 places, 1245 transitions, 17301 flow [2024-11-08 17:11:48,869 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=799, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=534, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=161, PETRI_FLOW=17301, PETRI_PLACES=543, PETRI_TRANSITIONS=1245} [2024-11-08 17:11:48,870 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 490 predicate places. [2024-11-08 17:11:48,870 INFO L471 AbstractCegarLoop]: Abstraction has has 543 places, 1245 transitions, 17301 flow [2024-11-08 17:11:48,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 21.541666666666668) internal successors, (1034), 48 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:11:48,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:11:48,871 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:11:48,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-08 17:11:49,071 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 17:11:49,071 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:11:49,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:11:49,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1515119028, now seen corresponding path program 3 times [2024-11-08 17:11:49,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:11:49,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740102931] [2024-11-08 17:11:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:11:49,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:11:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:11:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:11:50,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:11:50,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740102931] [2024-11-08 17:11:50,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740102931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:11:50,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977989360] [2024-11-08 17:11:50,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:11:50,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:11:50,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:11:50,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:11:50,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:11:51,085 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-08 17:11:51,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:11:51,088 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-08 17:11:51,092 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:11:51,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-08 17:11:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:11:52,187 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:11:53,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 117 treesize of output 105 [2024-11-08 17:11:53,622 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:11:53,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 237 treesize of output 208 [2024-11-08 17:11:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:11:55,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977989360] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:11:55,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:11:55,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 47 [2024-11-08 17:11:55,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091011578] [2024-11-08 17:11:55,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:11:55,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-08 17:11:55,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:11:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-08 17:11:55,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1963, Unknown=0, NotChecked=0, Total=2256 [2024-11-08 17:11:58,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-08 17:11:58,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 1245 transitions, 17301 flow. Second operand has 48 states, 48 states have (on average 21.541666666666668) internal successors, (1034), 48 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:11:58,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:11:58,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-08 17:11:58,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:12:35,155 INFO L124 PetriNetUnfolderBase]: 17854/34869 cut-off events. [2024-11-08 17:12:35,155 INFO L125 PetriNetUnfolderBase]: For 793564/793564 co-relation queries the response was YES. [2024-11-08 17:12:36,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202352 conditions, 34869 events. 17854/34869 cut-off events. For 793564/793564 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 310176 event pairs, 2654 based on Foata normal form. 49/34751 useless extension candidates. Maximal degree in co-relation 201844. Up to 10965 conditions per place. [2024-11-08 17:12:36,168 INFO L140 encePairwiseOnDemand]: 37/56 looper letters, 1104 selfloop transitions, 1083 changer transitions 259/2456 dead transitions. [2024-11-08 17:12:36,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 648 places, 2456 transitions, 37346 flow [2024-11-08 17:12:36,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2024-11-08 17:12:36,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2024-11-08 17:12:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 3682 transitions. [2024-11-08 17:12:36,178 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44727891156462585 [2024-11-08 17:12:36,178 INFO L175 Difference]: Start difference. First operand has 543 places, 1245 transitions, 17301 flow. Second operand 147 states and 3682 transitions. [2024-11-08 17:12:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 648 places, 2456 transitions, 37346 flow [2024-11-08 17:12:46,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 2456 transitions, 34120 flow, removed 1286 selfloop flow, removed 82 redundant places. [2024-11-08 17:12:46,243 INFO L231 Difference]: Finished difference. Result has 606 places, 1662 transitions, 25046 flow [2024-11-08 17:12:46,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=56, PETRI_DIFFERENCE_MINUEND_FLOW=15772, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=697, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=147, PETRI_FLOW=25046, PETRI_PLACES=606, PETRI_TRANSITIONS=1662} [2024-11-08 17:12:46,245 INFO L277 CegarLoopForPetriNet]: 53 programPoint places, 553 predicate places. [2024-11-08 17:12:46,246 INFO L471 AbstractCegarLoop]: Abstraction has has 606 places, 1662 transitions, 25046 flow [2024-11-08 17:12:46,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 21.541666666666668) internal successors, (1034), 48 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:12:46,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:12:46,247 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:12:46,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-08 17:12:46,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:12:46,451 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-08 17:12:46,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:12:46,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2134211406, now seen corresponding path program 4 times [2024-11-08 17:12:46,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:12:46,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446955005] [2024-11-08 17:12:46,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:12:46,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:12:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:12:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:12:48,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:12:48,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446955005] [2024-11-08 17:12:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446955005] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:12:48,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718217481] [2024-11-08 17:12:48,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 17:12:48,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:12:48,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:12:48,146 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:12:48,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1b8ec93-f786-4186-bb95-d3ff2cbef5f1/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:12:48,246 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 17:12:48,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:12:48,249 INFO L255 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-08 17:12:48,251 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:12:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:12:49,475 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:12:50,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-08 17:12:50,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-11-08 17:12:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:12:50,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718217481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:12:50,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:12:50,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 49 [2024-11-08 17:12:50,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36466791] [2024-11-08 17:12:50,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:12:50,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-08 17:12:50,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:12:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-08 17:12:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=2144, Unknown=0, NotChecked=0, Total=2450 [2024-11-08 17:12:53,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 56 [2024-11-08 17:12:53,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 1662 transitions, 25046 flow. Second operand has 50 states, 50 states have (on average 21.44) internal successors, (1072), 50 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 17:12:53,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:12:53,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 56 [2024-11-08 17:12:53,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand