./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/queue_ok.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a 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_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/queue_ok.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU --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 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:11:47,877 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:11:47,969 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:11:47,978 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:11:47,978 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:11:48,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:11:48,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:11:48,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:11:48,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:11:48,014 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:11:48,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:11:48,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:11:48,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:11:48,015 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:11:48,018 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:11:48,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:11:48,019 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:11:48,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:11:48,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:11:48,020 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:11:48,020 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:11:48,022 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:11:48,023 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:11:48,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:11:48,023 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:11:48,024 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:11:48,024 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:11:48,024 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:11:48,025 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:11:48,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:11:48,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:11:48,026 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:11:48,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:11:48,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:48,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:11:48,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:11:48,027 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:11:48,028 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:11:48,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:11:48,028 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:11:48,029 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:11:48,029 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:11:48,029 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_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7cc273f13a619f37768d5108c297b75ab7c37145fe391daced9c134730721251 [2024-10-31 22:11:48,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:11:48,317 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:11:48,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:11:48,322 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:11:48,323 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:11:48,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread/queue_ok.i Unable to find full path for "g++" [2024-10-31 22:11:50,418 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:11:50,783 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:11:50,785 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/sv-benchmarks/c/pthread/queue_ok.i [2024-10-31 22:11:50,816 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/data/fdcde8ff9/04772bac2d2b431eb8858b81e9b22f03/FLAG402f8be1b [2024-10-31 22:11:51,002 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/data/fdcde8ff9/04772bac2d2b431eb8858b81e9b22f03 [2024-10-31 22:11:51,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:11:51,008 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:11:51,012 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:51,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:11:51,021 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:11:51,022 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,024 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451ddd24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51, skipping insertion in model container [2024-10-31 22:11:51,024 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,089 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:11:51,743 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:51,761 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:11:51,823 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:11:51,932 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:11:51,932 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51 WrapperNode [2024-10-31 22:11:51,932 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:11:51,934 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:51,934 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:11:51,934 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:11:51,942 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:51,966 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,009 INFO L138 Inliner]: procedures = 274, calls = 94, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 241 [2024-10-31 22:11:52,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:11:52,010 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:11:52,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:11:52,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:11:52,023 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,023 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,033 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,058 INFO L175 MemorySlicer]: Split 75 memory accesses to 4 slices as follows [2, 5, 22, 46]. 61 percent of accesses are in the largest equivalence class. The 50 initializations are split as follows [2, 5, 20, 23]. The 11 writes are split as follows [0, 0, 1, 10]. [2024-10-31 22:11:52,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,072 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,079 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,080 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:11:52,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:11:52,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:11:52,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:11:52,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (1/1) ... [2024-10-31 22:11:52,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:11:52,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:11:52,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:11:52,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:11:52,171 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-31 22:11:52,171 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-31 22:11:52,171 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-31 22:11:52,171 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-31 22:11:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:11:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:11:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:11:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:11:52,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-31 22:11:52,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:11:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:11:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:11:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-31 22:11:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:11:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:11:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:11:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:11:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:11:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-31 22:11:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:11:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:11:52,178 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:11:52,420 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:11:52,423 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:11:53,200 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:11:53,200 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:11:53,836 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:11:53,837 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-31 22:11:53,839 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:53 BoogieIcfgContainer [2024-10-31 22:11:53,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:11:53,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:11:53,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:11:53,846 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:11:53,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:11:51" (1/3) ... [2024-10-31 22:11:53,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9bcf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:53, skipping insertion in model container [2024-10-31 22:11:53,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:11:51" (2/3) ... [2024-10-31 22:11:53,850 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9bcf3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:11:53, skipping insertion in model container [2024-10-31 22:11:53,850 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:11:53" (3/3) ... [2024-10-31 22:11:53,852 INFO L112 eAbstractionObserver]: Analyzing ICFG queue_ok.i [2024-10-31 22:11:53,876 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:11:53,877 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2024-10-31 22:11:53,877 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:11:54,024 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:11:54,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 272 flow [2024-10-31 22:11:54,169 INFO L124 PetriNetUnfolderBase]: 11/127 cut-off events. [2024-10-31 22:11:54,170 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:11:54,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136 conditions, 127 events. 11/127 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 405 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 99. Up to 3 conditions per place. [2024-10-31 22:11:54,178 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 129 transitions, 272 flow [2024-10-31 22:11:54,186 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 126 transitions, 264 flow [2024-10-31 22:11:54,202 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:11:54,210 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;@40dd61c6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:11:54,210 INFO L334 AbstractCegarLoop]: Starting to check reachability of 96 error locations. [2024-10-31 22:11:54,215 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:11:54,215 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2024-10-31 22:11:54,215 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:11:54,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:54,216 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:11:54,217 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:11:54,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:54,224 INFO L85 PathProgramCache]: Analyzing trace with hash 20809, now seen corresponding path program 1 times [2024-10-31 22:11:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527913474] [2024-10-31 22:11:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:54,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:54,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527913474] [2024-10-31 22:11:54,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527913474] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:54,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:54,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:11:54,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360540570] [2024-10-31 22:11:54,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:54,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:54,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:54,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:54,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:55,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-10-31 22:11:55,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 126 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2024-10-31 22:11:55,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:55,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-10-31 22:11:55,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:55,927 INFO L124 PetriNetUnfolderBase]: 1089/2984 cut-off events. [2024-10-31 22:11:55,927 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-10-31 22:11:55,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4727 conditions, 2984 events. 1089/2984 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23575 event pairs, 839 based on Foata normal form. 68/2109 useless extension candidates. Maximal degree in co-relation 4570. Up to 1689 conditions per place. [2024-10-31 22:11:55,957 INFO L140 encePairwiseOnDemand]: 121/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/114 dead transitions. [2024-10-31 22:11:55,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 114 transitions, 334 flow [2024-10-31 22:11:55,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:55,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:55,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2024-10-31 22:11:55,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6873385012919897 [2024-10-31 22:11:55,978 INFO L175 Difference]: Start difference. First operand has 122 places, 126 transitions, 264 flow. Second operand 3 states and 266 transitions. [2024-10-31 22:11:55,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 114 transitions, 334 flow [2024-10-31 22:11:55,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 114 transitions, 326 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:11:55,989 INFO L231 Difference]: Finished difference. Result has 112 places, 114 transitions, 236 flow [2024-10-31 22:11:55,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=112, PETRI_TRANSITIONS=114} [2024-10-31 22:11:55,995 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -10 predicate places. [2024-10-31 22:11:55,995 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 114 transitions, 236 flow [2024-10-31 22:11:55,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2024-10-31 22:11:55,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:55,996 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1] [2024-10-31 22:11:55,996 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:11:55,997 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:11:55,997 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash 20810, now seen corresponding path program 1 times [2024-10-31 22:11:55,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:55,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70330887] [2024-10-31 22:11:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:55,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:56,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:56,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:56,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70330887] [2024-10-31 22:11:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70330887] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:56,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:11:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62459411] [2024-10-31 22:11:56,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:56,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:11:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:56,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:11:56,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:11:56,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-10-31 22:11:56,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 114 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2024-10-31 22:11:56,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:56,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-10-31 22:11:56,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:56,774 INFO L124 PetriNetUnfolderBase]: 1089/2981 cut-off events. [2024-10-31 22:11:56,775 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-31 22:11:56,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4690 conditions, 2981 events. 1089/2981 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23571 event pairs, 839 based on Foata normal form. 3/2043 useless extension candidates. Maximal degree in co-relation 4679. Up to 1689 conditions per place. [2024-10-31 22:11:56,797 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 45 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-10-31 22:11:56,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 324 flow [2024-10-31 22:11:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:11:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:11:56,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2024-10-31 22:11:56,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6795865633074936 [2024-10-31 22:11:56,801 INFO L175 Difference]: Start difference. First operand has 112 places, 114 transitions, 236 flow. Second operand 3 states and 263 transitions. [2024-10-31 22:11:56,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 324 flow [2024-10-31 22:11:56,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 111 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:56,805 INFO L231 Difference]: Finished difference. Result has 109 places, 111 transitions, 230 flow [2024-10-31 22:11:56,805 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=109, PETRI_TRANSITIONS=111} [2024-10-31 22:11:56,806 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -13 predicate places. [2024-10-31 22:11:56,806 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 111 transitions, 230 flow [2024-10-31 22:11:56,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.66666666666667) internal successors, (215), 3 states have internal predecessors, (215), 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) [2024-10-31 22:11:56,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:56,807 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:11:56,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:11:56,808 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:11:56,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:56,809 INFO L85 PathProgramCache]: Analyzing trace with hash 620551874, now seen corresponding path program 1 times [2024-10-31 22:11:56,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:56,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719187849] [2024-10-31 22:11:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:56,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:56,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:56,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719187849] [2024-10-31 22:11:56,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719187849] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:56,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:56,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:56,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109392920] [2024-10-31 22:11:56,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:56,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:56,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:56,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:56,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:57,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-10-31 22:11:57,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 111 transitions, 230 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2024-10-31 22:11:57,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:57,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-10-31 22:11:57,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:57,471 INFO L124 PetriNetUnfolderBase]: 1089/2979 cut-off events. [2024-10-31 22:11:57,471 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-31 22:11:57,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 2979 events. 1089/2979 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23545 event pairs, 839 based on Foata normal form. 1/2041 useless extension candidates. Maximal degree in co-relation 4677. Up to 1688 conditions per place. [2024-10-31 22:11:57,493 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 44 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-10-31 22:11:57,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 109 transitions, 320 flow [2024-10-31 22:11:57,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 337 transitions. [2024-10-31 22:11:57,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6531007751937985 [2024-10-31 22:11:57,498 INFO L175 Difference]: Start difference. First operand has 109 places, 111 transitions, 230 flow. Second operand 4 states and 337 transitions. [2024-10-31 22:11:57,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 109 transitions, 320 flow [2024-10-31 22:11:57,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 109 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:11:57,503 INFO L231 Difference]: Finished difference. Result has 108 places, 109 transitions, 228 flow [2024-10-31 22:11:57,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=228, PETRI_PLACES=108, PETRI_TRANSITIONS=109} [2024-10-31 22:11:57,506 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -14 predicate places. [2024-10-31 22:11:57,506 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 109 transitions, 228 flow [2024-10-31 22:11:57,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 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) [2024-10-31 22:11:57,507 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:57,507 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:11:57,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:11:57,508 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:11:57,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash 620551875, now seen corresponding path program 1 times [2024-10-31 22:11:57,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:57,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619915580] [2024-10-31 22:11:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:57,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:57,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:57,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619915580] [2024-10-31 22:11:57,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619915580] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:57,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:57,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:57,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575689085] [2024-10-31 22:11:57,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:57,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:57,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:57,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:11:58,156 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 129 [2024-10-31 22:11:58,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 109 transitions, 228 flow. Second operand has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 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) [2024-10-31 22:11:58,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:58,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 129 [2024-10-31 22:11:58,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:58,653 INFO L124 PetriNetUnfolderBase]: 1089/2977 cut-off events. [2024-10-31 22:11:58,653 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 22:11:58,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4688 conditions, 2977 events. 1089/2977 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 23584 event pairs, 839 based on Foata normal form. 2/2041 useless extension candidates. Maximal degree in co-relation 4672. Up to 1688 conditions per place. [2024-10-31 22:11:58,672 INFO L140 encePairwiseOnDemand]: 124/129 looper letters, 45 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2024-10-31 22:11:58,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 107 transitions, 320 flow [2024-10-31 22:11:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:58,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 334 transitions. [2024-10-31 22:11:58,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6472868217054264 [2024-10-31 22:11:58,674 INFO L175 Difference]: Start difference. First operand has 108 places, 109 transitions, 228 flow. Second operand 4 states and 334 transitions. [2024-10-31 22:11:58,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 107 transitions, 320 flow [2024-10-31 22:11:58,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 314 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:58,677 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 224 flow [2024-10-31 22:11:58,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=224, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-10-31 22:11:58,678 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -16 predicate places. [2024-10-31 22:11:58,679 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 224 flow [2024-10-31 22:11:58,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.8) internal successors, (359), 5 states have internal predecessors, (359), 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) [2024-10-31 22:11:58,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:58,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:58,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:11:58,680 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:11:58,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:58,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1863706484, now seen corresponding path program 1 times [2024-10-31 22:11:58,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:58,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521317817] [2024-10-31 22:11:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:58,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:58,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:58,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521317817] [2024-10-31 22:11:58,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521317817] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:58,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:58,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:11:58,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375754165] [2024-10-31 22:11:58,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:58,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:11:58,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:58,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:11:58,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:11:59,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 129 [2024-10-31 22:11:59,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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) [2024-10-31 22:11:59,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:11:59,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 129 [2024-10-31 22:11:59,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:11:59,448 INFO L124 PetriNetUnfolderBase]: 1046/2622 cut-off events. [2024-10-31 22:11:59,448 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-31 22:11:59,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4287 conditions, 2622 events. 1046/2622 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 19408 event pairs, 426 based on Foata normal form. 120/2116 useless extension candidates. Maximal degree in co-relation 4272. Up to 882 conditions per place. [2024-10-31 22:11:59,465 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 67 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-10-31 22:11:59,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 122 transitions, 395 flow [2024-10-31 22:11:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:11:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:11:59,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 342 transitions. [2024-10-31 22:11:59,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-10-31 22:11:59,468 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 224 flow. Second operand 4 states and 342 transitions. [2024-10-31 22:11:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 122 transitions, 395 flow [2024-10-31 22:11:59,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 122 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:11:59,471 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 208 flow [2024-10-31 22:11:59,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2024-10-31 22:11:59,473 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-10-31 22:11:59,473 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 208 flow [2024-10-31 22:11:59,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 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) [2024-10-31 22:11:59,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:11:59,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:11:59,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:11:59,474 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:11:59,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:11:59,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1863706483, now seen corresponding path program 1 times [2024-10-31 22:11:59,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:11:59,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421781502] [2024-10-31 22:11:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:11:59,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:11:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:11:59,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:11:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:11:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421781502] [2024-10-31 22:11:59,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421781502] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:11:59,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:11:59,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:11:59,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020733393] [2024-10-31 22:11:59,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:11:59,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:11:59,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:11:59,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:11:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:12:00,194 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 129 [2024-10-31 22:12:00,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 208 flow. Second operand has 5 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 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) [2024-10-31 22:12:00,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:00,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 129 [2024-10-31 22:12:00,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:00,721 INFO L124 PetriNetUnfolderBase]: 1046/2354 cut-off events. [2024-10-31 22:12:00,721 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-10-31 22:12:00,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4097 conditions, 2354 events. 1046/2354 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 15825 event pairs, 426 based on Foata normal form. 120/2000 useless extension candidates. Maximal degree in co-relation 1953. Up to 881 conditions per place. [2024-10-31 22:12:00,735 INFO L140 encePairwiseOnDemand]: 118/129 looper letters, 66 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2024-10-31 22:12:00,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 115 transitions, 381 flow [2024-10-31 22:12:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:12:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:12:00,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 412 transitions. [2024-10-31 22:12:00,738 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6387596899224807 [2024-10-31 22:12:00,738 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 208 flow. Second operand 5 states and 412 transitions. [2024-10-31 22:12:00,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 115 transitions, 381 flow [2024-10-31 22:12:00,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 115 transitions, 375 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:12:00,741 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 196 flow [2024-10-31 22:12:00,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2024-10-31 22:12:00,742 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -30 predicate places. [2024-10-31 22:12:00,742 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 196 flow [2024-10-31 22:12:00,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 69.2) internal successors, (346), 5 states have internal predecessors, (346), 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) [2024-10-31 22:12:00,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:00,743 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:00,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:12:00,743 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:12:00,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1940325448, now seen corresponding path program 1 times [2024-10-31 22:12:00,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:00,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129709959] [2024-10-31 22:12:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:00,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:00,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:01,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:01,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129709959] [2024-10-31 22:12:01,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129709959] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:01,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:01,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:12:01,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800181598] [2024-10-31 22:12:01,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:01,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-31 22:12:01,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:01,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-31 22:12:01,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-31 22:12:01,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 129 [2024-10-31 22:12:01,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 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) [2024-10-31 22:12:01,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:01,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 129 [2024-10-31 22:12:01,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:02,796 INFO L124 PetriNetUnfolderBase]: 2065/4255 cut-off events. [2024-10-31 22:12:02,797 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-10-31 22:12:02,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7680 conditions, 4255 events. 2065/4255 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 29594 event pairs, 289 based on Foata normal form. 0/3449 useless extension candidates. Maximal degree in co-relation 2479. Up to 2157 conditions per place. [2024-10-31 22:12:02,820 INFO L140 encePairwiseOnDemand]: 120/129 looper letters, 132 selfloop transitions, 11 changer transitions 0/182 dead transitions. [2024-10-31 22:12:02,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 182 transitions, 669 flow [2024-10-31 22:12:02,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:12:02,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:12:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 551 transitions. [2024-10-31 22:12:02,823 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6101882613510521 [2024-10-31 22:12:02,823 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 196 flow. Second operand 7 states and 551 transitions. [2024-10-31 22:12:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 182 transitions, 669 flow [2024-10-31 22:12:02,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 182 transitions, 659 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:12:02,829 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 262 flow [2024-10-31 22:12:02,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=262, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2024-10-31 22:12:02,830 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-10-31 22:12:02,830 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 262 flow [2024-10-31 22:12:02,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 59.857142857142854) internal successors, (419), 7 states have internal predecessors, (419), 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) [2024-10-31 22:12:02,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:02,831 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:02,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-31 22:12:02,831 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:12:02,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:02,831 INFO L85 PathProgramCache]: Analyzing trace with hash -678346437, now seen corresponding path program 1 times [2024-10-31 22:12:02,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:02,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963342289] [2024-10-31 22:12:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:02,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:02,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:02,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963342289] [2024-10-31 22:12:02,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963342289] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:02,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:02,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:12:02,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411296508] [2024-10-31 22:12:02,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:02,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:12:02,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:02,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:12:02,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:12:02,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-10-31 22:12:02,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 262 flow. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2024-10-31 22:12:02,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:02,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-10-31 22:12:02,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:03,204 INFO L124 PetriNetUnfolderBase]: 692/1652 cut-off events. [2024-10-31 22:12:03,204 INFO L125 PetriNetUnfolderBase]: For 89/89 co-relation queries the response was YES. [2024-10-31 22:12:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3114 conditions, 1652 events. 692/1652 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10251 event pairs, 446 based on Foata normal form. 43/1432 useless extension candidates. Maximal degree in co-relation 3071. Up to 693 conditions per place. [2024-10-31 22:12:03,213 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 59 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-10-31 22:12:03,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 391 flow [2024-10-31 22:12:03,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:12:03,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:12:03,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2024-10-31 22:12:03,215 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7260981912144703 [2024-10-31 22:12:03,215 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 262 flow. Second operand 3 states and 281 transitions. [2024-10-31 22:12:03,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 391 flow [2024-10-31 22:12:03,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 109 transitions, 387 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-31 22:12:03,219 INFO L231 Difference]: Finished difference. Result has 98 places, 98 transitions, 249 flow [2024-10-31 22:12:03,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=249, PETRI_PLACES=98, PETRI_TRANSITIONS=98} [2024-10-31 22:12:03,220 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-10-31 22:12:03,221 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 98 transitions, 249 flow [2024-10-31 22:12:03,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2024-10-31 22:12:03,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:03,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:03,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:12:03,222 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:12:03,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:03,222 INFO L85 PathProgramCache]: Analyzing trace with hash 155541361, now seen corresponding path program 1 times [2024-10-31 22:12:03,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:03,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122831289] [2024-10-31 22:12:03,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:03,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:03,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:03,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122831289] [2024-10-31 22:12:03,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122831289] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:03,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:03,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:12:03,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317497112] [2024-10-31 22:12:03,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:03,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:12:03,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:03,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:12:03,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:12:03,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 129 [2024-10-31 22:12:03,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 98 transitions, 249 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2024-10-31 22:12:03,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:03,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 129 [2024-10-31 22:12:03,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:03,561 INFO L124 PetriNetUnfolderBase]: 572/1382 cut-off events. [2024-10-31 22:12:03,562 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2024-10-31 22:12:03,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2663 conditions, 1382 events. 572/1382 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7608 event pairs, 380 based on Foata normal form. 12/1194 useless extension candidates. Maximal degree in co-relation 1698. Up to 753 conditions per place. [2024-10-31 22:12:03,570 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 62 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-10-31 22:12:03,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 111 transitions, 401 flow [2024-10-31 22:12:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:12:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:12:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2024-10-31 22:12:03,572 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7416020671834626 [2024-10-31 22:12:03,572 INFO L175 Difference]: Start difference. First operand has 98 places, 98 transitions, 249 flow. Second operand 3 states and 287 transitions. [2024-10-31 22:12:03,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 111 transitions, 401 flow [2024-10-31 22:12:03,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-31 22:12:03,576 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 248 flow [2024-10-31 22:12:03,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2024-10-31 22:12:03,580 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -23 predicate places. [2024-10-31 22:12:03,581 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 248 flow [2024-10-31 22:12:03,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2024-10-31 22:12:03,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:03,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:03,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-31 22:12:03,582 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:12:03,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:03,582 INFO L85 PathProgramCache]: Analyzing trace with hash -451660651, now seen corresponding path program 1 times [2024-10-31 22:12:03,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:03,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862577960] [2024-10-31 22:12:03,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:03,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:03,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:03,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862577960] [2024-10-31 22:12:03,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862577960] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:03,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:12:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614899892] [2024-10-31 22:12:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:03,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:12:03,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:12:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:12:03,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 129 [2024-10-31 22:12:03,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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) [2024-10-31 22:12:03,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:03,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 129 [2024-10-31 22:12:03,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:04,009 INFO L124 PetriNetUnfolderBase]: 572/1349 cut-off events. [2024-10-31 22:12:04,010 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2024-10-31 22:12:04,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 1349 events. 572/1349 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7266 event pairs, 515 based on Foata normal form. 31/1215 useless extension candidates. Maximal degree in co-relation 809. Up to 1007 conditions per place. [2024-10-31 22:12:04,017 INFO L140 encePairwiseOnDemand]: 126/129 looper letters, 50 selfloop transitions, 1 changer transitions 0/96 dead transitions. [2024-10-31 22:12:04,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 96 transitions, 346 flow [2024-10-31 22:12:04,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:12:04,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:12:04,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2024-10-31 22:12:04,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6847545219638242 [2024-10-31 22:12:04,020 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 248 flow. Second operand 3 states and 265 transitions. [2024-10-31 22:12:04,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 96 transitions, 346 flow [2024-10-31 22:12:04,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:12:04,023 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 244 flow [2024-10-31 22:12:04,023 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-10-31 22:12:04,024 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -24 predicate places. [2024-10-31 22:12:04,024 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 244 flow [2024-10-31 22:12:04,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 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) [2024-10-31 22:12:04,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:04,025 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:04,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-31 22:12:04,025 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:12:04,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash -451660650, now seen corresponding path program 1 times [2024-10-31 22:12:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:04,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440916797] [2024-10-31 22:12:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:04,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:04,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:04,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:04,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440916797] [2024-10-31 22:12:04,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440916797] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:12:04,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:12:04,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:12:04,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395170725] [2024-10-31 22:12:04,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:12:04,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:12:04,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:04,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:12:04,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:12:04,399 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 129 [2024-10-31 22:12:04,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 244 flow. Second operand has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2024-10-31 22:12:04,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:04,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 129 [2024-10-31 22:12:04,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:04,669 INFO L124 PetriNetUnfolderBase]: 587/1354 cut-off events. [2024-10-31 22:12:04,669 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2024-10-31 22:12:04,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2686 conditions, 1354 events. 587/1354 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7174 event pairs, 395 based on Foata normal form. 12/1197 useless extension candidates. Maximal degree in co-relation 2674. Up to 779 conditions per place. [2024-10-31 22:12:04,678 INFO L140 encePairwiseOnDemand]: 125/129 looper letters, 62 selfloop transitions, 3 changer transitions 0/109 dead transitions. [2024-10-31 22:12:04,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 109 transitions, 401 flow [2024-10-31 22:12:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:12:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:12:04,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 358 transitions. [2024-10-31 22:12:04,681 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6937984496124031 [2024-10-31 22:12:04,681 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 244 flow. Second operand 4 states and 358 transitions. [2024-10-31 22:12:04,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 109 transitions, 401 flow [2024-10-31 22:12:04,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:12:04,687 INFO L231 Difference]: Finished difference. Result has 101 places, 96 transitions, 253 flow [2024-10-31 22:12:04,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=253, PETRI_PLACES=101, PETRI_TRANSITIONS=96} [2024-10-31 22:12:04,691 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -21 predicate places. [2024-10-31 22:12:04,691 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 96 transitions, 253 flow [2024-10-31 22:12:04,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.0) internal successors, (308), 4 states have internal predecessors, (308), 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) [2024-10-31 22:12:04,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:04,692 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:04,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-31 22:12:04,692 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:12:04,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:04,693 INFO L85 PathProgramCache]: Analyzing trace with hash 710870985, now seen corresponding path program 1 times [2024-10-31 22:12:04,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:04,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043886887] [2024-10-31 22:12:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:05,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:05,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043886887] [2024-10-31 22:12:05,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043886887] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:12:05,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665061575] [2024-10-31 22:12:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:05,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:05,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:05,276 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:05,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:12:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:05,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-31 22:12:05,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:05,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:12:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:05,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:12:05,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 30 [2024-10-31 22:12:06,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:12:06,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:12:06,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:06,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665061575] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:12:06,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:12:06,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-31 22:12:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47073807] [2024-10-31 22:12:06,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:12:06,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:12:06,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:12:06,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:12:06,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:12:08,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 129 [2024-10-31 22:12:08,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 96 transitions, 253 flow. Second operand has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 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) [2024-10-31 22:12:08,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:12:08,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 129 [2024-10-31 22:12:08,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:12:09,559 INFO L124 PetriNetUnfolderBase]: 1005/2167 cut-off events. [2024-10-31 22:12:09,560 INFO L125 PetriNetUnfolderBase]: For 168/168 co-relation queries the response was YES. [2024-10-31 22:12:09,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4471 conditions, 2167 events. 1005/2167 cut-off events. For 168/168 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 12914 event pairs, 183 based on Foata normal form. 12/1955 useless extension candidates. Maximal degree in co-relation 4457. Up to 471 conditions per place. [2024-10-31 22:12:09,575 INFO L140 encePairwiseOnDemand]: 120/129 looper letters, 127 selfloop transitions, 14 changer transitions 0/177 dead transitions. [2024-10-31 22:12:09,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 177 transitions, 731 flow [2024-10-31 22:12:09,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-31 22:12:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-31 22:12:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 738 transitions. [2024-10-31 22:12:09,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5720930232558139 [2024-10-31 22:12:09,578 INFO L175 Difference]: Start difference. First operand has 101 places, 96 transitions, 253 flow. Second operand 10 states and 738 transitions. [2024-10-31 22:12:09,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 177 transitions, 731 flow [2024-10-31 22:12:09,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 177 transitions, 723 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-31 22:12:09,583 INFO L231 Difference]: Finished difference. Result has 111 places, 103 transitions, 329 flow [2024-10-31 22:12:09,583 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=129, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=329, PETRI_PLACES=111, PETRI_TRANSITIONS=103} [2024-10-31 22:12:09,585 INFO L277 CegarLoopForPetriNet]: 122 programPoint places, -11 predicate places. [2024-10-31 22:12:09,586 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 103 transitions, 329 flow [2024-10-31 22:12:09,587 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 64.05882352941177) internal successors, (1089), 17 states have internal predecessors, (1089), 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) [2024-10-31 22:12:09,588 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:12:09,588 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:12:09,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:12:09,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:09,793 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 93 more)] === [2024-10-31 22:12:09,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:12:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1766144426, now seen corresponding path program 1 times [2024-10-31 22:12:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:12:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819386025] [2024-10-31 22:12:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:09,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:12:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:11,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:12:11,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819386025] [2024-10-31 22:12:11,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819386025] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:12:11,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381604989] [2024-10-31 22:12:11,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:12:11,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:12:11,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:12:11,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:12:11,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d2c80a4-7a8e-4f9f-ad39-e22b880b81b5/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:12:11,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:12:11,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-10-31 22:12:11,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:12:11,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-10-31 22:12:11,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-31 22:12:11,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:12:11,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2024-10-31 22:12:11,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-10-31 22:12:11,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-10-31 22:12:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:12:12,103 INFO L311 TraceCheckSpWp]: Computing backward predicates...