./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-simple-array-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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/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_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/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_99ef50a9-043e-4b56-bf12-22be2b1754e8/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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 17:17:50,246 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 17:17:50,341 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 17:17:50,347 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 17:17:50,347 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 17:17:50,393 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 17:17:50,395 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 17:17:50,396 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 17:17:50,397 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 17:17:50,399 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 17:17:50,399 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 17:17:50,400 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 17:17:50,400 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 17:17:50,401 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 17:17:50,402 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 17:17:50,403 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 17:17:50,405 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 17:17:50,405 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 17:17:50,405 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 17:17:50,406 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 17:17:50,406 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 17:17:50,410 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 17:17:50,411 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 17:17:50,411 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 17:17:50,411 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 17:17:50,411 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 17:17:50,412 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 17:17:50,412 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 17:17:50,412 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 17:17:50,413 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 17:17:50,413 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 17:17:50,413 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 17:17:50,414 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 17:17:50,416 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:17:50,418 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 17:17:50,418 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 17:17:50,419 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 17:17:50,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 17:17:50,419 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 17:17:50,419 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 17:17:50,420 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 17:17:50,420 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 17:17:50,420 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_99ef50a9-043e-4b56-bf12-22be2b1754e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2024-11-08 17:17:50,717 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 17:17:50,746 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 17:17:50,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 17:17:50,750 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 17:17:50,751 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 17:17:50,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c Unable to find full path for "g++" [2024-11-08 17:17:52,964 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 17:17:53,195 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 17:17:53,196 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-08 17:17:53,208 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/data/fe318e67d/58619b6ed368499380546d47ab9618e6/FLAG73352125f [2024-11-08 17:17:53,525 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/data/fe318e67d/58619b6ed368499380546d47ab9618e6 [2024-11-08 17:17:53,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 17:17:53,528 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 17:17:53,530 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 17:17:53,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 17:17:53,536 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 17:17:53,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,537 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4533a2ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53, skipping insertion in model container [2024-11-08 17:17:53,537 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,565 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 17:17:53,791 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 17:17:53,793 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:17:53,805 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 17:17:53,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 17:17:53,853 INFO L204 MainTranslator]: Completed translation [2024-11-08 17:17:53,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53 WrapperNode [2024-11-08 17:17:53,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 17:17:53,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 17:17:53,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 17:17:53,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 17:17:53,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,872 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,896 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 109 [2024-11-08 17:17:53,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 17:17:53,897 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 17:17:53,901 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 17:17:53,901 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 17:17:53,915 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,923 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,953 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-08 17:17:53,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,967 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,974 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,982 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:53,986 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 17:17:53,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 17:17:53,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 17:17:53,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 17:17:53,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (1/1) ... [2024-11-08 17:17:54,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 17:17:54,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:17:54,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 17:17:54,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 17:17:54,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 17:17:54,060 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 17:17:54,060 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 17:17:54,061 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 17:17:54,062 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 17:17:54,062 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 17:17:54,062 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 17:17:54,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 17:17:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 17:17:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 17:17:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 17:17:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 17:17:54,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 17:17:54,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 17:17:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 17:17:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 17:17:54,068 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 17:17:54,184 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 17:17:54,186 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 17:17:54,570 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 17:17:54,570 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 17:17:54,838 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 17:17:54,838 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-08 17:17:54,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:17:54 BoogieIcfgContainer [2024-11-08 17:17:54,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 17:17:54,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 17:17:54,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 17:17:54,845 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 17:17:54,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 05:17:53" (1/3) ... [2024-11-08 17:17:54,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aafa8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:17:54, skipping insertion in model container [2024-11-08 17:17:54,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 05:17:53" (2/3) ... [2024-11-08 17:17:54,846 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aafa8fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 05:17:54, skipping insertion in model container [2024-11-08 17:17:54,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 05:17:54" (3/3) ... [2024-11-08 17:17:54,848 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-11-08 17:17:54,866 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 17:17:54,867 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-08 17:17:54,867 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 17:17:54,938 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 17:17:54,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 72 transitions, 165 flow [2024-11-08 17:17:55,022 INFO L124 PetriNetUnfolderBase]: 11/69 cut-off events. [2024-11-08 17:17:55,023 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 17:17:55,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 69 events. 11/69 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 157 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 50. Up to 3 conditions per place. [2024-11-08 17:17:55,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 72 transitions, 165 flow [2024-11-08 17:17:55,033 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 68 transitions, 154 flow [2024-11-08 17:17:55,043 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 17:17:55,054 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;@22be535b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 17:17:55,054 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-08 17:17:55,059 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 17:17:55,059 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 17:17:55,059 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 17:17:55,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:17:55,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:17:55,061 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:17:55,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:17:55,066 INFO L85 PathProgramCache]: Analyzing trace with hash 15269111, now seen corresponding path program 1 times [2024-11-08 17:17:55,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:17:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063451334] [2024-11-08 17:17:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:17:55,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:17:55,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:17:55,401 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 17:17:55,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:17:55,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063451334] [2024-11-08 17:17:55,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063451334] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:17:55,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:17:55,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 17:17:55,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326678791] [2024-11-08 17:17:55,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:17:55,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 17:17:55,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:17:55,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 17:17:55,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 17:17:55,462 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:17:55,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 17:17:55,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:17:55,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:17:55,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:17:56,062 INFO L124 PetriNetUnfolderBase]: 2125/3537 cut-off events. [2024-11-08 17:17:56,063 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2024-11-08 17:17:56,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6525 conditions, 3537 events. 2125/3537 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23684 event pairs, 1627 based on Foata normal form. 1/2318 useless extension candidates. Maximal degree in co-relation 6080. Up to 2795 conditions per place. [2024-11-08 17:17:56,101 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 36 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2024-11-08 17:17:56,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 222 flow [2024-11-08 17:17:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 17:17:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 17:17:56,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-11-08 17:17:56,116 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6064814814814815 [2024-11-08 17:17:56,118 INFO L175 Difference]: Start difference. First operand has 67 places, 68 transitions, 154 flow. Second operand 3 states and 131 transitions. [2024-11-08 17:17:56,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 222 flow [2024-11-08 17:17:56,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 64 transitions, 210 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 17:17:56,128 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 138 flow [2024-11-08 17:17:56,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2024-11-08 17:17:56,134 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -8 predicate places. [2024-11-08 17:17:56,134 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 138 flow [2024-11-08 17:17:56,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 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 17:17:56,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:17:56,135 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 17:17:56,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 17:17:56,136 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:17:56,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:17:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 15269112, now seen corresponding path program 1 times [2024-11-08 17:17:56,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:17:56,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178485558] [2024-11-08 17:17:56,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:17:56,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:17:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:17:56,667 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 17:17:56,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:17:56,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178485558] [2024-11-08 17:17:56,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178485558] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:17:56,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:17:56,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:17:56,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116809537] [2024-11-08 17:17:56,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:17:56,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:17:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:17:56,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:17:56,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:17:56,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-08 17:17:56,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 17:17:56,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:17:56,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-08 17:17:56,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:17:57,293 INFO L124 PetriNetUnfolderBase]: 2126/3542 cut-off events. [2024-11-08 17:17:57,293 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-08 17:17:57,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6421 conditions, 3542 events. 2126/3542 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23711 event pairs, 1627 based on Foata normal form. 0/2317 useless extension candidates. Maximal degree in co-relation 6376. Up to 2810 conditions per place. [2024-11-08 17:17:57,322 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 47 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-11-08 17:17:57,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 69 transitions, 250 flow [2024-11-08 17:17:57,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:17:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:17:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 149 transitions. [2024-11-08 17:17:57,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173611111111112 [2024-11-08 17:17:57,326 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 138 flow. Second operand 4 states and 149 transitions. [2024-11-08 17:17:57,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 69 transitions, 250 flow [2024-11-08 17:17:57,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 69 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:17:57,331 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 163 flow [2024-11-08 17:17:57,331 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2024-11-08 17:17:57,332 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, -5 predicate places. [2024-11-08 17:17:57,333 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 163 flow [2024-11-08 17:17:57,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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 17:17:57,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:17:57,334 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-08 17:17:57,335 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 17:17:57,336 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:17:57,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:17:57,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1787274841, now seen corresponding path program 1 times [2024-11-08 17:17:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:17:57,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166740930] [2024-11-08 17:17:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:17:57,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:17:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:17:57,526 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 17:17:57,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:17:57,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166740930] [2024-11-08 17:17:57,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166740930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:17:57,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:17:57,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:17:57,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557937686] [2024-11-08 17:17:57,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:17:57,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:17:57,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:17:57,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:17:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:17:57,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-11-08 17:17:57,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 17:17:57,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:17:57,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-11-08 17:17:57,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:17:58,541 INFO L124 PetriNetUnfolderBase]: 4248/7072 cut-off events. [2024-11-08 17:17:58,541 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2024-11-08 17:17:58,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12822 conditions, 7072 events. 4248/7072 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 51343 event pairs, 3254 based on Foata normal form. 0/4695 useless extension candidates. Maximal degree in co-relation 6418. Up to 2807 conditions per place. [2024-11-08 17:17:58,645 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 79 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2024-11-08 17:17:58,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 423 flow [2024-11-08 17:17:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:17:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:17:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 218 transitions. [2024-11-08 17:17:58,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-11-08 17:17:58,648 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 163 flow. Second operand 5 states and 218 transitions. [2024-11-08 17:17:58,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 423 flow [2024-11-08 17:17:58,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 107 transitions, 420 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-08 17:17:58,651 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 209 flow [2024-11-08 17:17:58,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=209, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-11-08 17:17:58,652 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 0 predicate places. [2024-11-08 17:17:58,652 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 209 flow [2024-11-08 17:17:58,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 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 17:17:58,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:17:58,653 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 17:17:58,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-08 17:17:58,653 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:17:58,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:17:58,654 INFO L85 PathProgramCache]: Analyzing trace with hash -383925008, now seen corresponding path program 1 times [2024-11-08 17:17:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:17:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345738212] [2024-11-08 17:17:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:17:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:17:58,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:17:59,051 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 17:17:59,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:17:59,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345738212] [2024-11-08 17:17:59,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345738212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:17:59,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611269706] [2024-11-08 17:17:59,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:17:59,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:17:59,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:17:59,056 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:17:59,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 17:17:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:17:59,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 17:17:59,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:17:59,239 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 17:17:59,657 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 17:17:59,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:17:59,832 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 17:17:59,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611269706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:17:59,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:17:59,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-08 17:17:59,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949667015] [2024-11-08 17:17:59,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:17:59,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-08 17:17:59,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:17:59,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-08 17:17:59,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-08 17:17:59,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-08 17:17:59,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 209 flow. Second operand has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 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 17:17:59,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:17:59,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-08 17:17:59,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:00,946 INFO L124 PetriNetUnfolderBase]: 4247/7070 cut-off events. [2024-11-08 17:18:00,947 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2024-11-08 17:18:00,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12841 conditions, 7070 events. 4247/7070 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 51420 event pairs, 3254 based on Foata normal form. 1/4635 useless extension candidates. Maximal degree in co-relation 6426. Up to 5599 conditions per place. [2024-11-08 17:18:01,003 INFO L140 encePairwiseOnDemand]: 63/72 looper letters, 40 selfloop transitions, 13 changer transitions 0/71 dead transitions. [2024-11-08 17:18:01,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 71 transitions, 309 flow [2024-11-08 17:18:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:18:01,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:18:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 219 transitions. [2024-11-08 17:18:01,005 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-11-08 17:18:01,005 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 209 flow. Second operand 7 states and 219 transitions. [2024-11-08 17:18:01,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 71 transitions, 309 flow [2024-11-08 17:18:01,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 309 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:18:01,010 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 227 flow [2024-11-08 17:18:01,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-11-08 17:18:01,012 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2024-11-08 17:18:01,012 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 227 flow [2024-11-08 17:18:01,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 25.75) internal successors, (309), 12 states have internal predecessors, (309), 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 17:18:01,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:01,013 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:01,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 17:18:01,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:01,218 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:01,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 413814865, now seen corresponding path program 1 times [2024-11-08 17:18:01,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:01,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622990894] [2024-11-08 17:18:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:01,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:01,480 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 17:18:01,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622990894] [2024-11-08 17:18:01,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622990894] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:01,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727658254] [2024-11-08 17:18:01,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:01,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:01,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:01,484 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:01,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 17:18:01,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:01,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-08 17:18:01,562 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:01,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:18:01,779 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:18:01,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 17:18:01,822 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 17:18:01,822 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:01,945 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 17:18:01,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727658254] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:01,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-08 17:18:01,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 3] total 11 [2024-11-08 17:18:01,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089857225] [2024-11-08 17:18:01,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:18:01,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:18:01,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:01,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:18:01,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:18:02,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:18:02,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 227 flow. Second operand has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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 17:18:02,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:02,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:18:02,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:03,418 INFO L124 PetriNetUnfolderBase]: 6367/10592 cut-off events. [2024-11-08 17:18:03,418 INFO L125 PetriNetUnfolderBase]: For 161/161 co-relation queries the response was YES. [2024-11-08 17:18:03,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19224 conditions, 10592 events. 6367/10592 cut-off events. For 161/161 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 82967 event pairs, 4881 based on Foata normal form. 1/6993 useless extension candidates. Maximal degree in co-relation 12804. Up to 5595 conditions per place. [2024-11-08 17:18:03,492 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 71 selfloop transitions, 6 changer transitions 0/104 dead transitions. [2024-11-08 17:18:03,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 104 transitions, 460 flow [2024-11-08 17:18:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:18:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:18:03,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 228 transitions. [2024-11-08 17:18:03,494 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-08 17:18:03,495 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 227 flow. Second operand 5 states and 228 transitions. [2024-11-08 17:18:03,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 104 transitions, 460 flow [2024-11-08 17:18:03,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 104 transitions, 423 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-08 17:18:03,500 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 214 flow [2024-11-08 17:18:03,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-11-08 17:18:03,502 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2024-11-08 17:18:03,502 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 214 flow [2024-11-08 17:18:03,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.2) internal successors, (156), 5 states have internal predecessors, (156), 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 17:18:03,503 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:03,503 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:03,524 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 17:18:03,707 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:03,708 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:03,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:03,708 INFO L85 PathProgramCache]: Analyzing trace with hash 158268407, now seen corresponding path program 1 times [2024-11-08 17:18:03,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:03,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114462269] [2024-11-08 17:18:03,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:03,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:03,793 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 17:18:03,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:03,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114462269] [2024-11-08 17:18:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114462269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:18:03,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:18:03,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:18:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451827172] [2024-11-08 17:18:03,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:18:03,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:18:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:18:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:18:03,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-11-08 17:18:03,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 17:18:03,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:03,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-11-08 17:18:03,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:04,822 INFO L124 PetriNetUnfolderBase]: 4837/8015 cut-off events. [2024-11-08 17:18:04,823 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2024-11-08 17:18:04,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14726 conditions, 8015 events. 4837/8015 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 56573 event pairs, 2869 based on Foata normal form. 256/5969 useless extension candidates. Maximal degree in co-relation 8615. Up to 3802 conditions per place. [2024-11-08 17:18:04,870 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 90 selfloop transitions, 11 changer transitions 0/121 dead transitions. [2024-11-08 17:18:04,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 121 transitions, 526 flow [2024-11-08 17:18:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:18:04,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:18:04,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 257 transitions. [2024-11-08 17:18:04,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5949074074074074 [2024-11-08 17:18:04,872 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 214 flow. Second operand 6 states and 257 transitions. [2024-11-08 17:18:04,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 121 transitions, 526 flow [2024-11-08 17:18:04,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 520 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:18:04,879 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 246 flow [2024-11-08 17:18:04,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-11-08 17:18:04,880 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 8 predicate places. [2024-11-08 17:18:04,881 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 246 flow [2024-11-08 17:18:04,881 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 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 17:18:04,881 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:04,881 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:04,882 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 17:18:04,882 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:04,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:04,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1403000207, now seen corresponding path program 1 times [2024-11-08 17:18:04,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:04,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110173971] [2024-11-08 17:18:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:04,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:05,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:18:05,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:05,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110173971] [2024-11-08 17:18:05,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110173971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:05,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14476500] [2024-11-08 17:18:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:05,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:05,131 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:05,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 17:18:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:05,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 17:18:05,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:18:05,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:05,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:18:05,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14476500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:05,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:05,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 17:18:05,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240284489] [2024-11-08 17:18:05,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:05,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:18:05,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:18:05,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:18:05,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-11-08 17:18:05,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 246 flow. Second operand has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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 17:18:05,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:05,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-11-08 17:18:05,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:07,248 INFO L124 PetriNetUnfolderBase]: 5193/8681 cut-off events. [2024-11-08 17:18:07,248 INFO L125 PetriNetUnfolderBase]: For 1417/1544 co-relation queries the response was YES. [2024-11-08 17:18:07,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17006 conditions, 8681 events. 5193/8681 cut-off events. For 1417/1544 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 63189 event pairs, 4053 based on Foata normal form. 1/5932 useless extension candidates. Maximal degree in co-relation 6670. Up to 4155 conditions per place. [2024-11-08 17:18:07,306 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 79 selfloop transitions, 29 changer transitions 0/127 dead transitions. [2024-11-08 17:18:07,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 633 flow [2024-11-08 17:18:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:18:07,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 17:18:07,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 418 transitions. [2024-11-08 17:18:07,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4837962962962963 [2024-11-08 17:18:07,309 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 246 flow. Second operand 12 states and 418 transitions. [2024-11-08 17:18:07,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 633 flow [2024-11-08 17:18:07,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 127 transitions, 609 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:18:07,323 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 386 flow [2024-11-08 17:18:07,327 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=386, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-11-08 17:18:07,328 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2024-11-08 17:18:07,328 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 386 flow [2024-11-08 17:18:07,328 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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 17:18:07,328 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:07,328 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:07,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 17:18:07,529 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-08 17:18:07,530 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:07,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:07,533 INFO L85 PathProgramCache]: Analyzing trace with hash 546742762, now seen corresponding path program 1 times [2024-11-08 17:18:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:07,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866573217] [2024-11-08 17:18:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:07,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:07,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:07,636 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 17:18:07,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:07,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866573217] [2024-11-08 17:18:07,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866573217] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:18:07,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:18:07,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-08 17:18:07,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744460732] [2024-11-08 17:18:07,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:18:07,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:18:07,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:07,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:18:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:18:07,712 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 72 [2024-11-08 17:18:07,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 386 flow. Second operand has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 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 17:18:07,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:07,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 72 [2024-11-08 17:18:07,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:08,738 INFO L124 PetriNetUnfolderBase]: 5460/8645 cut-off events. [2024-11-08 17:18:08,738 INFO L125 PetriNetUnfolderBase]: For 1091/1399 co-relation queries the response was YES. [2024-11-08 17:18:08,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17146 conditions, 8645 events. 5460/8645 cut-off events. For 1091/1399 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 59013 event pairs, 4158 based on Foata normal form. 48/6248 useless extension candidates. Maximal degree in co-relation 7943. Up to 6989 conditions per place. [2024-11-08 17:18:08,804 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 84 selfloop transitions, 15 changer transitions 0/121 dead transitions. [2024-11-08 17:18:08,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 121 transitions, 672 flow [2024-11-08 17:18:08,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:18:08,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:18:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 242 transitions. [2024-11-08 17:18:08,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5601851851851852 [2024-11-08 17:18:08,806 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 386 flow. Second operand 6 states and 242 transitions. [2024-11-08 17:18:08,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 121 transitions, 672 flow [2024-11-08 17:18:08,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 121 transitions, 628 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-08 17:18:08,812 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 388 flow [2024-11-08 17:18:08,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=388, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2024-11-08 17:18:08,817 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 24 predicate places. [2024-11-08 17:18:08,819 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 388 flow [2024-11-08 17:18:08,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.4) internal successors, (142), 5 states have internal predecessors, (142), 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 17:18:08,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:08,820 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-08 17:18:08,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-08 17:18:08,820 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:08,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1670814329, now seen corresponding path program 2 times [2024-11-08 17:18:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:08,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000443185] [2024-11-08 17:18:08,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:08,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:08,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:09,196 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 17:18:09,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000443185] [2024-11-08 17:18:09,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000443185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:09,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699063638] [2024-11-08 17:18:09,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:18:09,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:09,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:09,199 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:09,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 17:18:09,279 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:18:09,279 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:18:09,280 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-08 17:18:09,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:09,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:18:09,503 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:18:09,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-08 17:18:09,620 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 17:18:09,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:09,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:18:09,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699063638] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:09,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:09,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-08 17:18:09,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104986681] [2024-11-08 17:18:09,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:09,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-08 17:18:09,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-08 17:18:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-11-08 17:18:11,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-08 17:18:11,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 388 flow. Second operand has 20 states, 20 states have (on average 26.25) internal successors, (525), 20 states have internal predecessors, (525), 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 17:18:11,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:11,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-08 17:18:11,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:14,582 INFO L124 PetriNetUnfolderBase]: 10858/18103 cut-off events. [2024-11-08 17:18:14,582 INFO L125 PetriNetUnfolderBase]: For 3044/3976 co-relation queries the response was YES. [2024-11-08 17:18:14,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35713 conditions, 18103 events. 10858/18103 cut-off events. For 3044/3976 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 145023 event pairs, 8376 based on Foata normal form. 11/12450 useless extension candidates. Maximal degree in co-relation 20521. Up to 5600 conditions per place. [2024-11-08 17:18:14,726 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 137 selfloop transitions, 24 changer transitions 0/179 dead transitions. [2024-11-08 17:18:14,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 988 flow [2024-11-08 17:18:14,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-08 17:18:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-08 17:18:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 500 transitions. [2024-11-08 17:18:14,731 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49603174603174605 [2024-11-08 17:18:14,731 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 388 flow. Second operand 14 states and 500 transitions. [2024-11-08 17:18:14,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 988 flow [2024-11-08 17:18:14,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 179 transitions, 964 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:18:14,763 INFO L231 Difference]: Finished difference. Result has 106 places, 97 transitions, 497 flow [2024-11-08 17:18:14,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=497, PETRI_PLACES=106, PETRI_TRANSITIONS=97} [2024-11-08 17:18:14,765 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 39 predicate places. [2024-11-08 17:18:14,765 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 97 transitions, 497 flow [2024-11-08 17:18:14,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 26.25) internal successors, (525), 20 states have internal predecessors, (525), 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 17:18:14,766 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:14,766 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:14,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-08 17:18:14,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:14,967 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:14,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash 167512227, now seen corresponding path program 1 times [2024-11-08 17:18:14,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:14,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564117008] [2024-11-08 17:18:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:15,030 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 17:18:15,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:15,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564117008] [2024-11-08 17:18:15,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564117008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:18:15,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:18:15,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:18:15,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712951968] [2024-11-08 17:18:15,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:18:15,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:18:15,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:15,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:18:15,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:18:15,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:18:15,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 97 transitions, 497 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 17:18:15,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:15,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:18:15,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:17,826 INFO L124 PetriNetUnfolderBase]: 17914/29433 cut-off events. [2024-11-08 17:18:17,826 INFO L125 PetriNetUnfolderBase]: For 4152/5462 co-relation queries the response was YES. [2024-11-08 17:18:17,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57493 conditions, 29433 events. 17914/29433 cut-off events. For 4152/5462 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 240098 event pairs, 3831 based on Foata normal form. 612/21677 useless extension candidates. Maximal degree in co-relation 46164. Up to 16131 conditions per place. [2024-11-08 17:18:18,059 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 104 selfloop transitions, 4 changer transitions 0/142 dead transitions. [2024-11-08 17:18:18,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 142 transitions, 839 flow [2024-11-08 17:18:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:18:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:18:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2024-11-08 17:18:18,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7013888888888888 [2024-11-08 17:18:18,062 INFO L175 Difference]: Start difference. First operand has 106 places, 97 transitions, 497 flow. Second operand 4 states and 202 transitions. [2024-11-08 17:18:18,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 142 transitions, 839 flow [2024-11-08 17:18:18,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 142 transitions, 829 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:18:18,090 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 512 flow [2024-11-08 17:18:18,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=512, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-11-08 17:18:18,092 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 42 predicate places. [2024-11-08 17:18:18,092 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 512 flow [2024-11-08 17:18:18,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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 17:18:18,093 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:18,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:18,093 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-08 17:18:18,093 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:18,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:18,094 INFO L85 PathProgramCache]: Analyzing trace with hash -978264019, now seen corresponding path program 1 times [2024-11-08 17:18:18,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:18,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221736544] [2024-11-08 17:18:18,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:18,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:18,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:18,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221736544] [2024-11-08 17:18:18,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221736544] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:18:18,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:18:18,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:18:18,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444094395] [2024-11-08 17:18:18,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:18:18,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:18:18,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:18,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:18:18,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:18:18,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:18:18,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 512 flow. Second operand has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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 17:18:18,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:18,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:18:18,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:20,280 INFO L124 PetriNetUnfolderBase]: 11411/19178 cut-off events. [2024-11-08 17:18:20,280 INFO L125 PetriNetUnfolderBase]: For 5117/5917 co-relation queries the response was YES. [2024-11-08 17:18:20,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40500 conditions, 19178 events. 11411/19178 cut-off events. For 5117/5917 co-relation queries the response was YES. Maximal size of possible extension queue 834. Compared 152091 event pairs, 8584 based on Foata normal form. 0/14743 useless extension candidates. Maximal degree in co-relation 32572. Up to 15083 conditions per place. [2024-11-08 17:18:20,436 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 48 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2024-11-08 17:18:20,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 98 transitions, 628 flow [2024-11-08 17:18:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:18:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:18:20,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 188 transitions. [2024-11-08 17:18:20,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-11-08 17:18:20,438 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 512 flow. Second operand 5 states and 188 transitions. [2024-11-08 17:18:20,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 98 transitions, 628 flow [2024-11-08 17:18:20,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 98 transitions, 628 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-08 17:18:20,472 INFO L231 Difference]: Finished difference. Result has 111 places, 98 transitions, 532 flow [2024-11-08 17:18:20,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=532, PETRI_PLACES=111, PETRI_TRANSITIONS=98} [2024-11-08 17:18:20,473 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 44 predicate places. [2024-11-08 17:18:20,474 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 98 transitions, 532 flow [2024-11-08 17:18:20,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.0) internal successors, (160), 5 states have internal predecessors, (160), 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 17:18:20,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:20,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:20,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-08 17:18:20,475 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:20,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:20,475 INFO L85 PathProgramCache]: Analyzing trace with hash -978264018, now seen corresponding path program 1 times [2024-11-08 17:18:20,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:20,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632134515] [2024-11-08 17:18:20,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:20,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:20,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:20,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:20,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632134515] [2024-11-08 17:18:20,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632134515] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:20,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353903120] [2024-11-08 17:18:20,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:20,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:20,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:20,804 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:20,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 17:18:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:20,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:18:20,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:20,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:18:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:18:21,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 17:18:21,010 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:18:21,011 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:18:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:21,102 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:21,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-08 17:18:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:21,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353903120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:21,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:21,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-08 17:18:21,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929252237] [2024-11-08 17:18:21,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:21,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:18:21,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:21,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:18:21,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:18:25,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:18:29,663 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-08 17:18:29,878 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:18:29,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 98 transitions, 532 flow. Second operand has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 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 17:18:29,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:29,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:18:29,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:33,031 INFO L124 PetriNetUnfolderBase]: 17193/29005 cut-off events. [2024-11-08 17:18:33,031 INFO L125 PetriNetUnfolderBase]: For 7314/8394 co-relation queries the response was YES. [2024-11-08 17:18:33,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59850 conditions, 29005 events. 17193/29005 cut-off events. For 7314/8394 co-relation queries the response was YES. Maximal size of possible extension queue 1047. Compared 236570 event pairs, 6938 based on Foata normal form. 0/22696 useless extension candidates. Maximal degree in co-relation 48211. Up to 13166 conditions per place. [2024-11-08 17:18:33,263 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 101 selfloop transitions, 22 changer transitions 0/161 dead transitions. [2024-11-08 17:18:33,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 161 transitions, 964 flow [2024-11-08 17:18:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:18:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 17:18:33,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 371 transitions. [2024-11-08 17:18:33,265 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5725308641975309 [2024-11-08 17:18:33,265 INFO L175 Difference]: Start difference. First operand has 111 places, 98 transitions, 532 flow. Second operand 9 states and 371 transitions. [2024-11-08 17:18:33,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 161 transitions, 964 flow [2024-11-08 17:18:33,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 947 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-08 17:18:33,311 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 607 flow [2024-11-08 17:18:33,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2024-11-08 17:18:33,312 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 51 predicate places. [2024-11-08 17:18:33,313 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 607 flow [2024-11-08 17:18:33,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 32.0) internal successors, (416), 13 states have internal predecessors, (416), 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 17:18:33,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:33,313 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 17:18:33,332 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-08 17:18:33,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:33,514 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:33,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:33,515 INFO L85 PathProgramCache]: Analyzing trace with hash -739225439, now seen corresponding path program 1 times [2024-11-08 17:18:33,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:33,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51604879] [2024-11-08 17:18:33,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:33,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:33,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:33,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51604879] [2024-11-08 17:18:33,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51604879] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:33,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317553119] [2024-11-08 17:18:33,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:33,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:33,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:33,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:33,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 17:18:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:33,905 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 17:18:33,907 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:33,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:18:33,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:18:33,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 17:18:34,000 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:18:34,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:18:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:34,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:34,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-08 17:18:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:34,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317553119] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:34,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:34,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-08 17:18:34,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645851111] [2024-11-08 17:18:34,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:34,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-08 17:18:34,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:34,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-08 17:18:34,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-08 17:18:34,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:18:34,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 607 flow. Second operand has 13 states, 13 states have (on average 32.30769230769231) internal successors, (420), 13 states have internal predecessors, (420), 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 17:18:34,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:34,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:18:34,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:37,975 INFO L124 PetriNetUnfolderBase]: 15798/26428 cut-off events. [2024-11-08 17:18:37,975 INFO L125 PetriNetUnfolderBase]: For 24595/26340 co-relation queries the response was YES. [2024-11-08 17:18:38,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65906 conditions, 26428 events. 15798/26428 cut-off events. For 24595/26340 co-relation queries the response was YES. Maximal size of possible extension queue 986. Compared 210135 event pairs, 4025 based on Foata normal form. 0/22109 useless extension candidates. Maximal degree in co-relation 53086. Up to 8062 conditions per place. [2024-11-08 17:18:38,152 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 104 selfloop transitions, 22 changer transitions 0/164 dead transitions. [2024-11-08 17:18:38,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 164 transitions, 1089 flow [2024-11-08 17:18:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-08 17:18:38,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-08 17:18:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 366 transitions. [2024-11-08 17:18:38,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-08 17:18:38,155 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 607 flow. Second operand 9 states and 366 transitions. [2024-11-08 17:18:38,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 164 transitions, 1089 flow [2024-11-08 17:18:38,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 164 transitions, 1073 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-08 17:18:38,181 INFO L231 Difference]: Finished difference. Result has 124 places, 108 transitions, 683 flow [2024-11-08 17:18:38,181 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=683, PETRI_PLACES=124, PETRI_TRANSITIONS=108} [2024-11-08 17:18:38,182 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 57 predicate places. [2024-11-08 17:18:38,182 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 108 transitions, 683 flow [2024-11-08 17:18:38,182 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 32.30769230769231) internal successors, (420), 13 states have internal predecessors, (420), 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 17:18:38,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:38,183 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2024-11-08 17:18:38,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-08 17:18:38,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-08 17:18:38,387 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:38,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:38,388 INFO L85 PathProgramCache]: Analyzing trace with hash -853185383, now seen corresponding path program 3 times [2024-11-08 17:18:38,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:38,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266061258] [2024-11-08 17:18:38,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:38,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:38,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:38,554 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 17:18:38,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:38,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266061258] [2024-11-08 17:18:38,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266061258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:38,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372091077] [2024-11-08 17:18:38,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 17:18:38,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:38,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:38,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:38,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 17:18:38,829 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 17:18:38,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:18:38,830 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-08 17:18:38,832 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:38,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:18:39,055 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-08 17:18:39,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2024-11-08 17:18:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:18:39,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 17:18:39,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372091077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:39,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:39,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-08 17:18:39,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097592408] [2024-11-08 17:18:39,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:39,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 17:18:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 17:18:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-08 17:18:40,682 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 72 [2024-11-08 17:18:40,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 108 transitions, 683 flow. Second operand has 21 states, 21 states have (on average 26.19047619047619) internal successors, (550), 21 states have internal predecessors, (550), 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 17:18:40,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:40,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 72 [2024-11-08 17:18:40,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:45,723 INFO L124 PetriNetUnfolderBase]: 16231/27387 cut-off events. [2024-11-08 17:18:45,723 INFO L125 PetriNetUnfolderBase]: For 33740/35399 co-relation queries the response was YES. [2024-11-08 17:18:46,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72403 conditions, 27387 events. 16231/27387 cut-off events. For 33740/35399 co-relation queries the response was YES. Maximal size of possible extension queue 971. Compared 221624 event pairs, 11764 based on Foata normal form. 3/22822 useless extension candidates. Maximal degree in co-relation 58418. Up to 17066 conditions per place. [2024-11-08 17:18:46,178 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 97 selfloop transitions, 41 changer transitions 0/158 dead transitions. [2024-11-08 17:18:46,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 158 transitions, 1156 flow [2024-11-08 17:18:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-08 17:18:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-08 17:18:46,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 671 transitions. [2024-11-08 17:18:46,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40519323671497587 [2024-11-08 17:18:46,183 INFO L175 Difference]: Start difference. First operand has 124 places, 108 transitions, 683 flow. Second operand 23 states and 671 transitions. [2024-11-08 17:18:46,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 158 transitions, 1156 flow [2024-11-08 17:18:46,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 158 transitions, 1119 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-11-08 17:18:46,224 INFO L231 Difference]: Finished difference. Result has 136 places, 112 transitions, 769 flow [2024-11-08 17:18:46,225 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=769, PETRI_PLACES=136, PETRI_TRANSITIONS=112} [2024-11-08 17:18:46,225 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 69 predicate places. [2024-11-08 17:18:46,226 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 112 transitions, 769 flow [2024-11-08 17:18:46,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 26.19047619047619) internal successors, (550), 21 states have internal predecessors, (550), 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 17:18:46,226 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:46,227 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:46,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 17:18:46,427 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 17:18:46,427 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:46,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1441151574, now seen corresponding path program 1 times [2024-11-08 17:18:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:46,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484380829] [2024-11-08 17:18:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:46,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:46,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:46,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:46,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484380829] [2024-11-08 17:18:46,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484380829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:18:46,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:18:46,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:18:46,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938180709] [2024-11-08 17:18:46,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:18:46,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:18:46,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:46,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:18:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:18:46,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:18:46,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 112 transitions, 769 flow. Second operand has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 17:18:46,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:46,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:18:46,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:48,987 INFO L124 PetriNetUnfolderBase]: 12530/21788 cut-off events. [2024-11-08 17:18:48,987 INFO L125 PetriNetUnfolderBase]: For 27911/29071 co-relation queries the response was YES. [2024-11-08 17:18:49,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58355 conditions, 21788 events. 12530/21788 cut-off events. For 27911/29071 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 176184 event pairs, 8853 based on Foata normal form. 0/19141 useless extension candidates. Maximal degree in co-relation 33778. Up to 16529 conditions per place. [2024-11-08 17:18:49,128 INFO L140 encePairwiseOnDemand]: 68/72 looper letters, 59 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-11-08 17:18:49,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 110 transitions, 899 flow [2024-11-08 17:18:49,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 17:18:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-08 17:18:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 156 transitions. [2024-11-08 17:18:49,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-08 17:18:49,130 INFO L175 Difference]: Start difference. First operand has 136 places, 112 transitions, 769 flow. Second operand 4 states and 156 transitions. [2024-11-08 17:18:49,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 110 transitions, 899 flow [2024-11-08 17:18:49,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 110 transitions, 762 flow, removed 25 selfloop flow, removed 18 redundant places. [2024-11-08 17:18:49,152 INFO L231 Difference]: Finished difference. Result has 119 places, 110 transitions, 644 flow [2024-11-08 17:18:49,152 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=644, PETRI_PLACES=119, PETRI_TRANSITIONS=110} [2024-11-08 17:18:49,153 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 52 predicate places. [2024-11-08 17:18:49,153 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 110 transitions, 644 flow [2024-11-08 17:18:49,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.25) internal successors, (133), 4 states have internal predecessors, (133), 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 17:18:49,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:49,153 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:49,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 17:18:49,153 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:49,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:49,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1441151573, now seen corresponding path program 1 times [2024-11-08 17:18:49,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:49,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270413725] [2024-11-08 17:18:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:49,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:49,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:49,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:49,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270413725] [2024-11-08 17:18:49,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270413725] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:49,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953725772] [2024-11-08 17:18:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:49,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:49,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:49,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:49,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 17:18:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:49,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-08 17:18:49,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:49,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:49,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-08 17:18:49,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:49,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953725772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:49,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:49,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-08 17:18:49,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990434184] [2024-11-08 17:18:49,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:49,625 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-08 17:18:49,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:49,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-08 17:18:49,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-08 17:18:49,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 72 [2024-11-08 17:18:49,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 110 transitions, 644 flow. Second operand has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 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 17:18:49,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:49,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 72 [2024-11-08 17:18:49,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:51,956 INFO L124 PetriNetUnfolderBase]: 9665/17059 cut-off events. [2024-11-08 17:18:51,956 INFO L125 PetriNetUnfolderBase]: For 21217/22065 co-relation queries the response was YES. [2024-11-08 17:18:52,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45169 conditions, 17059 events. 9665/17059 cut-off events. For 21217/22065 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 135459 event pairs, 3824 based on Foata normal form. 0/15090 useless extension candidates. Maximal degree in co-relation 21583. Up to 8133 conditions per place. [2024-11-08 17:18:52,088 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 97 selfloop transitions, 20 changer transitions 0/160 dead transitions. [2024-11-08 17:18:52,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 160 transitions, 1060 flow [2024-11-08 17:18:52,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-08 17:18:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-08 17:18:52,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 313 transitions. [2024-11-08 17:18:52,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.621031746031746 [2024-11-08 17:18:52,090 INFO L175 Difference]: Start difference. First operand has 119 places, 110 transitions, 644 flow. Second operand 7 states and 313 transitions. [2024-11-08 17:18:52,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 160 transitions, 1060 flow [2024-11-08 17:18:52,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 160 transitions, 1051 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 17:18:52,139 INFO L231 Difference]: Finished difference. Result has 125 places, 111 transitions, 694 flow [2024-11-08 17:18:52,140 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=694, PETRI_PLACES=125, PETRI_TRANSITIONS=111} [2024-11-08 17:18:52,140 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 58 predicate places. [2024-11-08 17:18:52,140 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 111 transitions, 694 flow [2024-11-08 17:18:52,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 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 17:18:52,141 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:52,141 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:52,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 17:18:52,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 17:18:52,345 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:52,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:52,346 INFO L85 PathProgramCache]: Analyzing trace with hash -976714134, now seen corresponding path program 1 times [2024-11-08 17:18:52,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:52,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19617304] [2024-11-08 17:18:52,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:52,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:52,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:52,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19617304] [2024-11-08 17:18:52,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19617304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:52,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717812595] [2024-11-08 17:18:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:52,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:52,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:52,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:52,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 17:18:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:52,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:18:52,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:52,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:52,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:52,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717812595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:52,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:52,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 17:18:52,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458620612] [2024-11-08 17:18:52,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:52,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:18:52,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:18:52,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:18:53,040 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2024-11-08 17:18:53,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 111 transitions, 694 flow. Second operand has 14 states, 14 states have (on average 24.928571428571427) internal successors, (349), 14 states have internal predecessors, (349), 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 17:18:53,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:53,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2024-11-08 17:18:53,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:56,149 INFO L124 PetriNetUnfolderBase]: 15019/24528 cut-off events. [2024-11-08 17:18:56,149 INFO L125 PetriNetUnfolderBase]: For 38052/38648 co-relation queries the response was YES. [2024-11-08 17:18:56,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68262 conditions, 24528 events. 15019/24528 cut-off events. For 38052/38648 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 181136 event pairs, 7132 based on Foata normal form. 244/21983 useless extension candidates. Maximal degree in co-relation 33727. Up to 9403 conditions per place. [2024-11-08 17:18:56,284 INFO L140 encePairwiseOnDemand]: 57/72 looper letters, 194 selfloop transitions, 40 changer transitions 0/250 dead transitions. [2024-11-08 17:18:56,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 250 transitions, 1830 flow [2024-11-08 17:18:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:18:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 17:18:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 433 transitions. [2024-11-08 17:18:56,288 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5011574074074074 [2024-11-08 17:18:56,288 INFO L175 Difference]: Start difference. First operand has 125 places, 111 transitions, 694 flow. Second operand 12 states and 433 transitions. [2024-11-08 17:18:56,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 250 transitions, 1830 flow [2024-11-08 17:18:56,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 250 transitions, 1767 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-08 17:18:56,333 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 801 flow [2024-11-08 17:18:56,333 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=801, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2024-11-08 17:18:56,334 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 67 predicate places. [2024-11-08 17:18:56,334 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 801 flow [2024-11-08 17:18:56,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.928571428571427) internal successors, (349), 14 states have internal predecessors, (349), 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 17:18:56,334 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:56,335 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] [2024-11-08 17:18:56,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 17:18:56,535 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 17:18:56,535 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:56,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:56,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1257540643, now seen corresponding path program 1 times [2024-11-08 17:18:56,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:56,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778365122] [2024-11-08 17:18:56,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:56,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:56,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:56,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:18:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778365122] [2024-11-08 17:18:56,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778365122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:18:56,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772363814] [2024-11-08 17:18:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:56,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:18:56,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:18:56,725 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:18:56,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 17:18:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:18:56,822 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 17:18:56,824 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:18:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:56,910 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:18:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-08 17:18:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772363814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:18:56,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:18:56,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-08 17:18:56,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157606071] [2024-11-08 17:18:56,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:18:56,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-08 17:18:56,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:18:56,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-08 17:18:56,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-08 17:18:57,198 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 72 [2024-11-08 17:18:57,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 801 flow. Second operand has 14 states, 14 states have (on average 25.285714285714285) internal successors, (354), 14 states have internal predecessors, (354), 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 17:18:57,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:18:57,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 72 [2024-11-08 17:18:57,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:18:59,397 INFO L124 PetriNetUnfolderBase]: 10323/16613 cut-off events. [2024-11-08 17:18:59,397 INFO L125 PetriNetUnfolderBase]: For 38394/39420 co-relation queries the response was YES. [2024-11-08 17:18:59,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50923 conditions, 16613 events. 10323/16613 cut-off events. For 38394/39420 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 113939 event pairs, 5320 based on Foata normal form. 130/15203 useless extension candidates. Maximal degree in co-relation 26240. Up to 8215 conditions per place. [2024-11-08 17:18:59,535 INFO L140 encePairwiseOnDemand]: 57/72 looper letters, 159 selfloop transitions, 40 changer transitions 0/218 dead transitions. [2024-11-08 17:18:59,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 218 transitions, 1714 flow [2024-11-08 17:18:59,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 17:18:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-08 17:18:59,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 413 transitions. [2024-11-08 17:18:59,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47800925925925924 [2024-11-08 17:18:59,537 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 801 flow. Second operand 12 states and 413 transitions. [2024-11-08 17:18:59,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 218 transitions, 1714 flow [2024-11-08 17:18:59,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 218 transitions, 1653 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-11-08 17:18:59,588 INFO L231 Difference]: Finished difference. Result has 143 places, 125 transitions, 910 flow [2024-11-08 17:18:59,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=910, PETRI_PLACES=143, PETRI_TRANSITIONS=125} [2024-11-08 17:18:59,589 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 76 predicate places. [2024-11-08 17:18:59,590 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 125 transitions, 910 flow [2024-11-08 17:18:59,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.285714285714285) internal successors, (354), 14 states have internal predecessors, (354), 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 17:18:59,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:18:59,590 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:18:59,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 17:18:59,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 17:18:59,791 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:18:59,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:18:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash 964945321, now seen corresponding path program 1 times [2024-11-08 17:18:59,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:18:59,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062415919] [2024-11-08 17:18:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:18:59,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:18:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:19:00,085 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 17:19:00,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:19:00,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062415919] [2024-11-08 17:19:00,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062415919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:19:00,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:19:00,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 17:19:00,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492040007] [2024-11-08 17:19:00,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:19:00,086 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 17:19:00,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:19:00,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 17:19:00,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 17:19:00,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 72 [2024-11-08 17:19:00,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 125 transitions, 910 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 17:19:00,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:19:00,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 72 [2024-11-08 17:19:00,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:19:01,560 INFO L124 PetriNetUnfolderBase]: 7469/13107 cut-off events. [2024-11-08 17:19:01,560 INFO L125 PetriNetUnfolderBase]: For 36283/36679 co-relation queries the response was YES. [2024-11-08 17:19:01,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42409 conditions, 13107 events. 7469/13107 cut-off events. For 36283/36679 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 97306 event pairs, 5380 based on Foata normal form. 1/12354 useless extension candidates. Maximal degree in co-relation 29418. Up to 9742 conditions per place. [2024-11-08 17:19:01,646 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 81 selfloop transitions, 2 changer transitions 19/138 dead transitions. [2024-11-08 17:19:01,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 138 transitions, 1156 flow [2024-11-08 17:19:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 17:19:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-08 17:19:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 195 transitions. [2024-11-08 17:19:01,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-08 17:19:01,647 INFO L175 Difference]: Start difference. First operand has 143 places, 125 transitions, 910 flow. Second operand 5 states and 195 transitions. [2024-11-08 17:19:01,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 138 transitions, 1156 flow [2024-11-08 17:19:01,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 138 transitions, 1115 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-08 17:19:01,714 INFO L231 Difference]: Finished difference. Result has 143 places, 118 transitions, 808 flow [2024-11-08 17:19:01,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=808, PETRI_PLACES=143, PETRI_TRANSITIONS=118} [2024-11-08 17:19:01,715 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 76 predicate places. [2024-11-08 17:19:01,715 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 118 transitions, 808 flow [2024-11-08 17:19:01,715 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 17:19:01,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:19:01,715 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:19:01,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-08 17:19:01,716 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:19:01,716 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:19:01,716 INFO L85 PathProgramCache]: Analyzing trace with hash -156028044, now seen corresponding path program 2 times [2024-11-08 17:19:01,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:19:01,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858802496] [2024-11-08 17:19:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:19:01,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:19:01,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:19:02,051 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 17:19:02,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:19:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858802496] [2024-11-08 17:19:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858802496] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 17:19:02,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36779934] [2024-11-08 17:19:02,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 17:19:02,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:19:02,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 17:19:02,054 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 17:19:02,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 17:19:02,152 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 17:19:02,152 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 17:19:02,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-08 17:19:02,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 17:19:02,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-08 17:19:02,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-08 17:19:02,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-08 17:19:02,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-08 17:19:02,293 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-08 17:19:02,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-08 17:19:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:19:02,428 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 17:19:02,886 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-08 17:19:02,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36779934] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 17:19:02,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 17:19:02,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-08 17:19:02,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349017200] [2024-11-08 17:19:02,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 17:19:02,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-08 17:19:02,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:19:02,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-08 17:19:02,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-11-08 17:19:03,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 72 [2024-11-08 17:19:03,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 118 transitions, 808 flow. Second operand has 21 states, 21 states have (on average 30.047619047619047) internal successors, (631), 21 states have internal predecessors, (631), 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 17:19:03,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:19:03,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 72 [2024-11-08 17:19:03,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:19:06,141 INFO L124 PetriNetUnfolderBase]: 9303/16391 cut-off events. [2024-11-08 17:19:06,141 INFO L125 PetriNetUnfolderBase]: For 39874/40201 co-relation queries the response was YES. [2024-11-08 17:19:06,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50704 conditions, 16391 events. 9303/16391 cut-off events. For 39874/40201 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 126682 event pairs, 3126 based on Foata normal form. 244/15536 useless extension candidates. Maximal degree in co-relation 50656. Up to 5114 conditions per place. [2024-11-08 17:19:06,257 INFO L140 encePairwiseOnDemand]: 62/72 looper letters, 166 selfloop transitions, 30 changer transitions 0/244 dead transitions. [2024-11-08 17:19:06,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 244 transitions, 1869 flow [2024-11-08 17:19:06,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-08 17:19:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-08 17:19:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 508 transitions. [2024-11-08 17:19:06,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2024-11-08 17:19:06,259 INFO L175 Difference]: Start difference. First operand has 143 places, 118 transitions, 808 flow. Second operand 13 states and 508 transitions. [2024-11-08 17:19:06,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 244 transitions, 1869 flow [2024-11-08 17:19:06,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 244 transitions, 1832 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-08 17:19:06,307 INFO L231 Difference]: Finished difference. Result has 152 places, 126 transitions, 956 flow [2024-11-08 17:19:06,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=956, PETRI_PLACES=152, PETRI_TRANSITIONS=126} [2024-11-08 17:19:06,307 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 85 predicate places. [2024-11-08 17:19:06,308 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 126 transitions, 956 flow [2024-11-08 17:19:06,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 30.047619047619047) internal successors, (631), 21 states have internal predecessors, (631), 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 17:19:06,308 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:19:06,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:19:06,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 17:19:06,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_99ef50a9-043e-4b56-bf12-22be2b1754e8/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 17:19:06,512 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:19:06,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:19:06,513 INFO L85 PathProgramCache]: Analyzing trace with hash 2080998088, now seen corresponding path program 1 times [2024-11-08 17:19:06,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:19:06,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680538929] [2024-11-08 17:19:06,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:19:06,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:19:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:19:06,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:19:06,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:19:06,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680538929] [2024-11-08 17:19:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680538929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:19:06,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:19:06,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:19:06,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842502973] [2024-11-08 17:19:06,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:19:06,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:19:06,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:19:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:19:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:19:06,650 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:19:06,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 126 transitions, 956 flow. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 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 17:19:06,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:19:06,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:19:06,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 17:19:11,125 INFO L124 PetriNetUnfolderBase]: 19708/32973 cut-off events. [2024-11-08 17:19:11,126 INFO L125 PetriNetUnfolderBase]: For 114391/115319 co-relation queries the response was YES. [2024-11-08 17:19:11,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113749 conditions, 32973 events. 19708/32973 cut-off events. For 114391/115319 co-relation queries the response was YES. Maximal size of possible extension queue 901. Compared 264488 event pairs, 7775 based on Foata normal form. 436/31392 useless extension candidates. Maximal degree in co-relation 81081. Up to 12032 conditions per place. [2024-11-08 17:19:11,394 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 208 selfloop transitions, 13 changer transitions 0/265 dead transitions. [2024-11-08 17:19:11,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 265 transitions, 2588 flow [2024-11-08 17:19:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 17:19:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 17:19:11,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 279 transitions. [2024-11-08 17:19:11,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-08 17:19:11,396 INFO L175 Difference]: Start difference. First operand has 152 places, 126 transitions, 956 flow. Second operand 6 states and 279 transitions. [2024-11-08 17:19:11,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 265 transitions, 2588 flow [2024-11-08 17:19:11,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 265 transitions, 2491 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-08 17:19:11,581 INFO L231 Difference]: Finished difference. Result has 155 places, 137 transitions, 1097 flow [2024-11-08 17:19:11,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1097, PETRI_PLACES=155, PETRI_TRANSITIONS=137} [2024-11-08 17:19:11,582 INFO L277 CegarLoopForPetriNet]: 67 programPoint places, 88 predicate places. [2024-11-08 17:19:11,582 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 137 transitions, 1097 flow [2024-11-08 17:19:11,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 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 17:19:11,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 17:19:11,582 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 17:19:11,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-08 17:19:11,582 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-08 17:19:11,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 17:19:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash -533148870, now seen corresponding path program 2 times [2024-11-08 17:19:11,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 17:19:11,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380382512] [2024-11-08 17:19:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 17:19:11,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 17:19:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 17:19:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-08 17:19:11,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 17:19:11,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380382512] [2024-11-08 17:19:11,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380382512] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 17:19:11,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 17:19:11,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 17:19:11,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580030990] [2024-11-08 17:19:11,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 17:19:11,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 17:19:11,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 17:19:11,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 17:19:11,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 17:19:11,695 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 72 [2024-11-08 17:19:11,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 137 transitions, 1097 flow. Second operand has 5 states, 5 states have (on average 33.8) internal successors, (169), 5 states have internal predecessors, (169), 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 17:19:11,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 17:19:11,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 72 [2024-11-08 17:19:11,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand