./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 d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/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_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB --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 0.3.0-dev-d790fec [2024-11-28 04:59:53,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-28 04:59:53,105 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-28 04:59:53,115 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-28 04:59:53,116 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-28 04:59:53,156 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-28 04:59:53,157 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-28 04:59:53,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-28 04:59:53,158 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-28 04:59:53,158 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-28 04:59:53,158 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-28 04:59:53,158 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-28 04:59:53,159 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-28 04:59:53,159 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-28 04:59:53,159 INFO L153 SettingsManager]: * Use SBE=true [2024-11-28 04:59:53,159 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-28 04:59:53,159 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-28 04:59:53,159 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-28 04:59:53,160 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-28 04:59:53,161 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-28 04:59:53,161 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-28 04:59:53,161 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-28 04:59:53,161 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-28 04:59:53,161 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:59:53,161 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:59:53,161 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:59:53,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:59:53,162 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-28 04:59:53,162 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-28 04:59:53,162 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-28 04:59:53,162 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-28 04:59:53,162 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:59:53,162 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-28 04:59:53,162 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-28 04:59:53,163 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-28 04:59:53,163 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-28 04:59:53,163 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-28 04:59:53,163 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-28 04:59:53,163 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-28 04:59:53,163 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-28 04:59:53,163 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB 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 [2024-11-28 04:59:53,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-28 04:59:53,586 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-28 04:59:53,590 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-28 04:59:53,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-28 04:59:53,594 INFO L274 PluginConnector]: CDTParser initialized [2024-11-28 04:59:53,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-11-28 04:59:57,307 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/data/9a03b36d6/02cdff10cbde4eb089b1827fa27dd146/FLAGbe850e4bf [2024-11-28 04:59:57,798 INFO L384 CDTParser]: Found 1 translation units. [2024-11-28 04:59:57,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/sv-benchmarks/c/weaver/chl-nzb-file-trans.wvr.c [2024-11-28 04:59:57,823 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/data/9a03b36d6/02cdff10cbde4eb089b1827fa27dd146/FLAGbe850e4bf [2024-11-28 04:59:57,853 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/data/9a03b36d6/02cdff10cbde4eb089b1827fa27dd146 [2024-11-28 04:59:57,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-28 04:59:57,860 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-28 04:59:57,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-28 04:59:57,862 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-28 04:59:57,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-28 04:59:57,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:57" (1/1) ... [2024-11-28 04:59:57,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508b877f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:57, skipping insertion in model container [2024-11-28 04:59:57,873 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 04:59:57" (1/1) ... [2024-11-28 04:59:57,911 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-28 04:59:58,262 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-28 04:59:58,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:59:58,290 INFO L200 MainTranslator]: Completed pre-run [2024-11-28 04:59:58,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-28 04:59:58,394 INFO L204 MainTranslator]: Completed translation [2024-11-28 04:59:58,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58 WrapperNode [2024-11-28 04:59:58,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-28 04:59:58,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-28 04:59:58,397 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-28 04:59:58,397 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-28 04:59:58,413 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,436 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,527 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 599 [2024-11-28 04:59:58,527 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-28 04:59:58,528 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-28 04:59:58,528 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-28 04:59:58,528 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-28 04:59:58,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,553 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,594 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]. [2024-11-28 04:59:58,594 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,594 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,613 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,615 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,638 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,656 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-28 04:59:58,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-28 04:59:58,658 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-28 04:59:58,658 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-28 04:59:58,660 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (1/1) ... [2024-11-28 04:59:58,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-28 04:59:58,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 04:59:58,705 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-28 04:59:58,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-28 04:59:58,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-28 04:59:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-28 04:59:58,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-28 04:59:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-28 04:59:58,752 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-28 04:59:58,753 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-28 04:59:58,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-28 04:59:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-28 04:59:58,759 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-28 04:59:58,998 INFO L234 CfgBuilder]: Building ICFG [2024-11-28 04:59:59,000 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-28 05:00:00,744 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-28 05:00:00,744 INFO L283 CfgBuilder]: Performing block encoding [2024-11-28 05:00:01,933 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-28 05:00:01,935 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-28 05:00:01,935 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:00:01 BoogieIcfgContainer [2024-11-28 05:00:01,936 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-28 05:00:01,940 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-28 05:00:01,940 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-28 05:00:01,947 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-28 05:00:01,947 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 04:59:57" (1/3) ... [2024-11-28 05:00:01,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d7bdfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:00:01, skipping insertion in model container [2024-11-28 05:00:01,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 04:59:58" (2/3) ... [2024-11-28 05:00:01,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37d7bdfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:00:01, skipping insertion in model container [2024-11-28 05:00:01,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:00:01" (3/3) ... [2024-11-28 05:00:01,953 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-trans.wvr.c [2024-11-28 05:00:01,975 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-28 05:00:01,977 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-trans.wvr.c that has 4 procedures, 157 locations, 1 initial locations, 6 loop locations, and 56 error locations. [2024-11-28 05:00:01,977 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-28 05:00:02,250 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-28 05:00:02,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2024-11-28 05:00:02,493 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2024-11-28 05:00:02,497 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-28 05:00:02,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 30/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 702 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2024-11-28 05:00:02,512 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2024-11-28 05:00:02,526 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2024-11-28 05:00:02,541 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-28 05:00:02,566 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;@795272bd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-28 05:00:02,567 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-11-28 05:00:02,576 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-28 05:00:02,576 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-28 05:00:02,576 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-28 05:00:02,576 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:00:02,577 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:00:02,577 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-28 05:00:02,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:02,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1898915, now seen corresponding path program 1 times [2024-11-28 05:00:02,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:02,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163169574] [2024-11-28 05:00:02,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:03,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:03,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:03,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163169574] [2024-11-28 05:00:03,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163169574] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:00:03,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:00:03,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-28 05:00:03,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615176296] [2024-11-28 05:00:03,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:00:03,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-28 05:00:03,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:03,176 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-28 05:00:03,176 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-28 05:00:03,313 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-28 05:00:03,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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) [2024-11-28 05:00:03,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:00:03,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-28 05:00:03,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:00:15,044 INFO L124 PetriNetUnfolderBase]: 49592/89310 cut-off events. [2024-11-28 05:00:15,044 INFO L125 PetriNetUnfolderBase]: For 1203/1203 co-relation queries the response was YES. [2024-11-28 05:00:15,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153743 conditions, 89310 events. 49592/89310 cut-off events. For 1203/1203 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 853061 event pairs, 29501 based on Foata normal form. 1/71582 useless extension candidates. Maximal degree in co-relation 150436. Up to 63484 conditions per place. [2024-11-28 05:00:15,715 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2024-11-28 05:00:15,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2024-11-28 05:00:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:00:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:00:15,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-11-28 05:00:15,741 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2024-11-28 05:00:15,743 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2024-11-28 05:00:15,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2024-11-28 05:00:15,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-28 05:00:15,783 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2024-11-28 05:00:15,786 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2024-11-28 05:00:15,793 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2024-11-28 05:00:15,794 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2024-11-28 05:00:15,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 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) [2024-11-28 05:00:15,794 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:00:15,794 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-28 05:00:15,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-28 05:00:15,795 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-28 05:00:15,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:15,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1898916, now seen corresponding path program 1 times [2024-11-28 05:00:15,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:15,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63907327] [2024-11-28 05:00:15,798 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:15,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:16,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:16,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:16,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63907327] [2024-11-28 05:00:16,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63907327] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-28 05:00:16,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-28 05:00:16,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-28 05:00:16,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605818909] [2024-11-28 05:00:16,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-28 05:00:16,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-28 05:00:16,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:16,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-28 05:00:16,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-28 05:00:16,752 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-28 05:00:16,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2024-11-28 05:00:16,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:00:16,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-28 05:00:16,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:00:25,146 INFO L124 PetriNetUnfolderBase]: 49595/89319 cut-off events. [2024-11-28 05:00:25,146 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-11-28 05:00:25,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153141 conditions, 89319 events. 49595/89319 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 853156 event pairs, 29501 based on Foata normal form. 0/71586 useless extension candidates. Maximal degree in co-relation 153091. Up to 63497 conditions per place. [2024-11-28 05:00:25,852 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 91 selfloop transitions, 7 changer transitions 0/183 dead transitions. [2024-11-28 05:00:25,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 183 transitions, 574 flow [2024-11-28 05:00:25,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-28 05:00:25,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-28 05:00:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-11-28 05:00:25,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2024-11-28 05:00:25,856 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2024-11-28 05:00:25,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 183 transitions, 574 flow [2024-11-28 05:00:25,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:00:25,864 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 412 flow [2024-11-28 05:00:25,865 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2024-11-28 05:00:25,866 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -7 predicate places. [2024-11-28 05:00:25,866 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 412 flow [2024-11-28 05:00:25,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2024-11-28 05:00:25,867 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:00:25,867 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-28 05:00:25,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-28 05:00:25,867 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-28 05:00:25,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1824919760, now seen corresponding path program 1 times [2024-11-28 05:00:25,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:25,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647591822] [2024-11-28 05:00:25,869 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:25,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:26,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:26,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647591822] [2024-11-28 05:00:26,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647591822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:00:26,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861091016] [2024-11-28 05:00:26,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:26,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:26,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:26,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:26,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-28 05:00:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:26,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-28 05:00:26,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:26,558 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 [2024-11-28 05:00:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:26,646 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:26,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:26,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861091016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:00:26,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:00:26,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-28 05:00:26,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656311334] [2024-11-28 05:00:26,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:26,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-28 05:00:26,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:26,762 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-28 05:00:26,762 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-28 05:00:27,467 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-28 05:00:27,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 412 flow. Second operand has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 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) [2024-11-28 05:00:27,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:00:27,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-28 05:00:27,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:00:36,489 INFO L124 PetriNetUnfolderBase]: 49598/89340 cut-off events. [2024-11-28 05:00:36,489 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-28 05:00:36,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153219 conditions, 89340 events. 49598/89340 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 2274. Compared 853734 event pairs, 29501 based on Foata normal form. 6/71617 useless extension candidates. Maximal degree in co-relation 153123. Up to 63498 conditions per place. [2024-11-28 05:00:36,976 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 98 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-11-28 05:00:36,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 204 transitions, 728 flow [2024-11-28 05:00:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-28 05:00:36,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-28 05:00:36,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2024-11-28 05:00:36,980 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146953405017921 [2024-11-28 05:00:36,980 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 412 flow. Second operand 6 states and 686 transitions. [2024-11-28 05:00:36,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 204 transitions, 728 flow [2024-11-28 05:00:36,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 204 transitions, 708 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-28 05:00:36,987 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 538 flow [2024-11-28 05:00:36,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-11-28 05:00:36,988 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2024-11-28 05:00:36,989 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 538 flow [2024-11-28 05:00:36,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 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) [2024-11-28 05:00:36,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:00:36,989 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-28 05:00:37,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-28 05:00:37,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:37,190 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-28 05:00:37,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -620383148, now seen corresponding path program 2 times [2024-11-28 05:00:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217113056] [2024-11-28 05:00:37,191 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:00:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:37,247 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:00:37,248 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:38,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:38,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217113056] [2024-11-28 05:00:38,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217113056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:00:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185738723] [2024-11-28 05:00:38,052 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-28 05:00:38,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:38,055 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:38,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-28 05:00:38,256 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-28 05:00:38,256 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-28 05:00:38,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-28 05:00:38,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:38,274 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 [2024-11-28 05:00:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:38,471 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-28 05:00:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185738723] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:00:38,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:00:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-28 05:00:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980565998] [2024-11-28 05:00:38,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:38,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-28 05:00:38,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:38,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-28 05:00:38,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-28 05:00:41,121 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-28 05:00:41,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 538 flow. Second operand has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 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) [2024-11-28 05:00:41,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:00:41,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-28 05:00:41,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-28 05:00:51,830 INFO L124 PetriNetUnfolderBase]: 49601/89346 cut-off events. [2024-11-28 05:00:51,830 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-11-28 05:00:52,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153273 conditions, 89346 events. 49601/89346 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 2274. Compared 853641 event pairs, 29501 based on Foata normal form. 6/71626 useless extension candidates. Maximal degree in co-relation 153155. Up to 63487 conditions per place. [2024-11-28 05:00:52,292 INFO L140 encePairwiseOnDemand]: 173/186 looper letters, 91 selfloop transitions, 34 changer transitions 0/210 dead transitions. [2024-11-28 05:00:52,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 210 transitions, 824 flow [2024-11-28 05:00:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-28 05:00:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-28 05:00:52,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 959 transitions. [2024-11-28 05:00:52,297 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.572879330943847 [2024-11-28 05:00:52,297 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 538 flow. Second operand 9 states and 959 transitions. [2024-11-28 05:00:52,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 210 transitions, 824 flow [2024-11-28 05:00:52,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 210 transitions, 738 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-28 05:00:52,305 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 550 flow [2024-11-28 05:00:52,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2024-11-28 05:00:52,306 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2024-11-28 05:00:52,306 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 550 flow [2024-11-28 05:00:52,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 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) [2024-11-28 05:00:52,308 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-28 05:00:52,308 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-28 05:00:52,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-28 05:00:52,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:52,512 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-28 05:00:52,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-28 05:00:52,513 INFO L85 PathProgramCache]: Analyzing trace with hash 86001905, now seen corresponding path program 1 times [2024-11-28 05:00:52,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-28 05:00:52,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430181317] [2024-11-28 05:00:52,513 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:52,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-28 05:00:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:00:53,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-28 05:00:53,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430181317] [2024-11-28 05:00:53,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430181317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-28 05:00:53,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461543711] [2024-11-28 05:00:53,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-28 05:00:53,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-28 05:00:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-28 05:00:53,094 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-28 05:00:53,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_830ddda9-830c-45d8-94bf-9a4ddc72ae82/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-28 05:00:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-28 05:00:53,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-28 05:00:53,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-28 05:00:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:00:53,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-28 05:00:53,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-28 05:00:53,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461543711] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-28 05:00:53,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-28 05:00:53,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-28 05:00:53,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61226213] [2024-11-28 05:00:53,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-28 05:00:53,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-28 05:00:53,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-28 05:00:53,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-28 05:00:53,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2024-11-28 05:00:53,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 186 [2024-11-28 05:00:53,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 550 flow. Second operand has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 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) [2024-11-28 05:00:53,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-28 05:00:53,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 186 [2024-11-28 05:00:53,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand