./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/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_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/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_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/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 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:05:57,727 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:05:57,789 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-08 16:05:57,793 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:05:57,794 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:05:57,816 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:05:57,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:05:57,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:05:57,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:05:57,817 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:05:57,818 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:05:57,818 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:05:57,819 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:05:57,819 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:05:57,819 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:05:57,820 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:05:57,820 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-08 16:05:57,820 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:05:57,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-08 16:05:57,821 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:05:57,821 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:05:57,822 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:05:57,822 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:05:57,822 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:05:57,823 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:05:57,823 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:05:57,823 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:05:57,823 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-08 16:05:57,824 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:05:57,824 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:05:57,824 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:05:57,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:05:57,830 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:05:57,830 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:05:57,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:05:57,831 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:05:57,831 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:05:57,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:05:57,831 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:05:57,832 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:05:57,832 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:05:57,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:05:57,833 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_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d0975dc4466296431d96c26938a2e71864de63aba998f18ecd8a32ca341796b [2024-11-08 16:05:58,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:05:58,116 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:05:58,119 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:05:58,120 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:05:58,121 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:05:58,123 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c Unable to find full path for "g++" [2024-11-08 16:06:00,075 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:06:00,313 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:06:00,314 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-11-08 16:06:00,323 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/data/6e49ee328/e22b655344f84fad9b97f8f6479aa9b0/FLAG49454b05d [2024-11-08 16:06:00,339 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/data/6e49ee328/e22b655344f84fad9b97f8f6479aa9b0 [2024-11-08 16:06:00,343 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:06:00,345 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:06:00,346 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:06:00,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:06:00,353 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:06:00,354 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f6a929 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00, skipping insertion in model container [2024-11-08 16:06:00,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,386 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:06:00,664 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 16:06:00,668 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:06:00,678 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:06:00,722 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:06:00,747 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:06:00,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00 WrapperNode [2024-11-08 16:06:00,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:06:00,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:06:00,748 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:06:00,748 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:06:00,756 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,770 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,823 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 599 [2024-11-08 16:06:00,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:06:00,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:06:00,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:06:00,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:06:00,835 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,842 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,865 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 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 16:06:00,866 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,866 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,882 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,889 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,892 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,901 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:06:00,902 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:06:00,903 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:06:00,903 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:06:00,903 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (1/1) ... [2024-11-08 16:06:00,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:06:00,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:00,947 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:06:00,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:06:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-08 16:06:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-08 16:06:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-08 16:06:00,990 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-08 16:06:00,990 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-08 16:06:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-08 16:06:00,991 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-08 16:06:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-08 16:06:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-08 16:06:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:06:00,991 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-08 16:06:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:06:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:06:00,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:06:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:06:00,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-08 16:06:00,996 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 16:06:01,180 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:06:01,182 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:06:02,338 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-08 16:06:02,339 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:06:03,190 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:06:03,190 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-08 16:06:03,190 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:06:03 BoogieIcfgContainer [2024-11-08 16:06:03,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:06:03,194 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:06:03,195 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:06:03,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:06:03,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:06:00" (1/3) ... [2024-11-08 16:06:03,200 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f30ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:06:03, skipping insertion in model container [2024-11-08 16:06:03,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:00" (2/3) ... [2024-11-08 16:06:03,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f30ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:06:03, skipping insertion in model container [2024-11-08 16:06:03,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:06:03" (3/3) ... [2024-11-08 16:06:03,203 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2024-11-08 16:06:03,220 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:06:03,220 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 56 error locations. [2024-11-08 16:06:03,220 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-08 16:06:03,383 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-08 16:06:03,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 195 transitions, 411 flow [2024-11-08 16:06:03,554 INFO L124 PetriNetUnfolderBase]: 33/192 cut-off events. [2024-11-08 16:06:03,554 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-08 16:06:03,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205 conditions, 192 events. 33/192 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 716 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2024-11-08 16:06:03,565 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 195 transitions, 411 flow [2024-11-08 16:06:03,575 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 191 transitions, 400 flow [2024-11-08 16:06:03,587 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:06:03,596 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;@5e79c03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:06:03,596 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-11-08 16:06:03,601 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-08 16:06:03,601 INFO L124 PetriNetUnfolderBase]: 3/10 cut-off events. [2024-11-08 16:06:03,602 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-08 16:06:03,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:03,602 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:06:03,603 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-08 16:06:03,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:03,610 INFO L85 PathProgramCache]: Analyzing trace with hash 58530643, now seen corresponding path program 1 times [2024-11-08 16:06:03,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:03,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018774220] [2024-11-08 16:06:03,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:03,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:03,933 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 16:06:03,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:03,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018774220] [2024-11-08 16:06:03,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018774220] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:03,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:03,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-08 16:06:03,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552919698] [2024-11-08 16:06:03,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:03,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:06:03,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:03,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:06:03,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:06:04,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 195 [2024-11-08 16:06:04,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 191 transitions, 400 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 16:06:04,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:04,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 195 [2024-11-08 16:06:04,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:14,659 INFO L124 PetriNetUnfolderBase]: 49601/89296 cut-off events. [2024-11-08 16:06:14,660 INFO L125 PetriNetUnfolderBase]: For 1212/1212 co-relation queries the response was YES. [2024-11-08 16:06:14,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153721 conditions, 89296 events. 49601/89296 cut-off events. For 1212/1212 co-relation queries the response was YES. Maximal size of possible extension queue 2267. Compared 850595 event pairs, 29352 based on Foata normal form. 1/71874 useless extension candidates. Maximal degree in co-relation 150410. Up to 63479 conditions per place. [2024-11-08 16:06:15,275 INFO L140 encePairwiseOnDemand]: 186/195 looper letters, 84 selfloop transitions, 2 changer transitions 0/183 dead transitions. [2024-11-08 16:06:15,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 183 transitions, 556 flow [2024-11-08 16:06:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:06:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:06:15,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 396 transitions. [2024-11-08 16:06:15,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.676923076923077 [2024-11-08 16:06:15,296 INFO L175 Difference]: Start difference. First operand has 168 places, 191 transitions, 400 flow. Second operand 3 states and 396 transitions. [2024-11-08 16:06:15,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 183 transitions, 556 flow [2024-11-08 16:06:15,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 183 transitions, 544 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-08 16:06:15,314 INFO L231 Difference]: Finished difference. Result has 159 places, 183 transitions, 376 flow [2024-11-08 16:06:15,316 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=159, PETRI_TRANSITIONS=183} [2024-11-08 16:06:15,323 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -9 predicate places. [2024-11-08 16:06:15,323 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 183 transitions, 376 flow [2024-11-08 16:06:15,324 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 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 16:06:15,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:15,324 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-08 16:06:15,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:06:15,325 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-08 16:06:15,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:15,326 INFO L85 PathProgramCache]: Analyzing trace with hash 58530644, now seen corresponding path program 1 times [2024-11-08 16:06:15,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:15,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860593002] [2024-11-08 16:06:15,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:15,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:15,647 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 16:06:15,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:15,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860593002] [2024-11-08 16:06:15,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860593002] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:15,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:15,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:06:15,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749629421] [2024-11-08 16:06:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:15,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:06:15,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:15,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:06:15,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:06:15,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 195 [2024-11-08 16:06:15,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 183 transitions, 376 flow. Second operand has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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 16:06:15,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:15,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 195 [2024-11-08 16:06:15,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:23,972 INFO L124 PetriNetUnfolderBase]: 49607/89314 cut-off events. [2024-11-08 16:06:23,972 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-08 16:06:24,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153130 conditions, 89314 events. 49607/89314 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 2268. Compared 850716 event pairs, 29352 based on Foata normal form. 0/71885 useless extension candidates. Maximal degree in co-relation 153062. Up to 63492 conditions per place. [2024-11-08 16:06:24,587 INFO L140 encePairwiseOnDemand]: 185/195 looper letters, 91 selfloop transitions, 7 changer transitions 0/192 dead transitions. [2024-11-08 16:06:24,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 192 transitions, 592 flow [2024-11-08 16:06:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:06:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-08 16:06:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2024-11-08 16:06:24,592 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6905982905982906 [2024-11-08 16:06:24,593 INFO L175 Difference]: Start difference. First operand has 159 places, 183 transitions, 376 flow. Second operand 3 states and 404 transitions. [2024-11-08 16:06:24,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 192 transitions, 592 flow [2024-11-08 16:06:24,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 192 transitions, 586 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-08 16:06:24,600 INFO L231 Difference]: Finished difference. Result has 161 places, 189 transitions, 430 flow [2024-11-08 16:06:24,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=430, PETRI_PLACES=161, PETRI_TRANSITIONS=189} [2024-11-08 16:06:24,601 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, -7 predicate places. [2024-11-08 16:06:24,601 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 189 transitions, 430 flow [2024-11-08 16:06:24,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.75) internal successors, (407), 4 states have internal predecessors, (407), 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 16:06:24,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:24,602 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1] [2024-11-08 16:06:24,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:06:24,605 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-08 16:06:24,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash -68408819, now seen corresponding path program 1 times [2024-11-08 16:06:24,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:24,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235660502] [2024-11-08 16:06:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:24,999 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 16:06:24,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:24,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235660502] [2024-11-08 16:06:25,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235660502] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:25,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018538996] [2024-11-08 16:06:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:25,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:25,004 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:25,012 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:06:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:25,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-08 16:06:25,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:25,264 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 16:06:25,366 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 16:06:25,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:25,470 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 16:06:25,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018538996] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:25,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:25,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-08 16:06:25,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241990382] [2024-11-08 16:06:25,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:25,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 16:06:25,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:25,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 16:06:25,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:06:26,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 195 [2024-11-08 16:06:26,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 189 transitions, 430 flow. Second operand has 9 states, 9 states have (on average 96.66666666666667) internal successors, (870), 9 states have internal predecessors, (870), 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 16:06:26,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:26,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 195 [2024-11-08 16:06:26,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-08 16:06:35,145 INFO L124 PetriNetUnfolderBase]: 49613/89350 cut-off events. [2024-11-08 16:06:35,145 INFO L125 PetriNetUnfolderBase]: For 307/307 co-relation queries the response was YES. [2024-11-08 16:06:35,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153241 conditions, 89350 events. 49613/89350 cut-off events. For 307/307 co-relation queries the response was YES. Maximal size of possible extension queue 2254. Compared 849906 event pairs, 29352 based on Foata normal form. 6/71924 useless extension candidates. Maximal degree in co-relation 153110. Up to 63499 conditions per place. [2024-11-08 16:06:35,629 INFO L140 encePairwiseOnDemand]: 179/195 looper letters, 116 selfloop transitions, 21 changer transitions 0/225 dead transitions. [2024-11-08 16:06:35,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 225 transitions, 806 flow [2024-11-08 16:06:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:06:35,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-08 16:06:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 728 transitions. [2024-11-08 16:06:35,632 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-11-08 16:06:35,632 INFO L175 Difference]: Start difference. First operand has 161 places, 189 transitions, 430 flow. Second operand 6 states and 728 transitions. [2024-11-08 16:06:35,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 225 transitions, 806 flow [2024-11-08 16:06:35,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 225 transitions, 780 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-08 16:06:35,639 INFO L231 Difference]: Finished difference. Result has 168 places, 201 transitions, 584 flow [2024-11-08 16:06:35,640 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=402, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=168, PETRI_TRANSITIONS=201} [2024-11-08 16:06:35,641 INFO L277 CegarLoopForPetriNet]: 168 programPoint places, 0 predicate places. [2024-11-08 16:06:35,641 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 201 transitions, 584 flow [2024-11-08 16:06:35,642 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.66666666666667) internal successors, (870), 9 states have internal predecessors, (870), 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 16:06:35,642 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-08 16:06:35,642 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1] [2024-11-08 16:06:35,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-08 16:06:35,842 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:35,843 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-08 16:06:35,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1672526316, now seen corresponding path program 2 times [2024-11-08 16:06:35,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:35,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728001083] [2024-11-08 16:06:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:35,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:36,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:36,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:36,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728001083] [2024-11-08 16:06:36,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728001083] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:36,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553215867] [2024-11-08 16:06:36,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:06:36,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:36,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:36,493 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:36,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb53ad72-5409-4ae6-8a66-9d8909ad6bf7/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:06:36,643 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:06:36,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:36,644 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 16:06:36,647 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:36,677 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 16:06:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:37,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:37,359 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:37,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553215867] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:37,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:37,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-08 16:06:37,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286552708] [2024-11-08 16:06:37,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:37,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-08 16:06:37,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:37,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-08 16:06:37,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-08 16:06:40,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 195 [2024-11-08 16:06:40,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 201 transitions, 584 flow. Second operand has 18 states, 18 states have (on average 96.83333333333333) internal successors, (1743), 18 states have internal predecessors, (1743), 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 16:06:40,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-08 16:06:40,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 195 [2024-11-08 16:06:40,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand