./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/twostage_3.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_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/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_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/twostage_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/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_5c04bc97-bb3e-4249-af37-a5992a0cd875/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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:16:43,733 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:16:43,828 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:16:43,836 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:16:43,837 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:16:43,876 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:16:43,877 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:16:43,877 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:16:43,878 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:16:43,879 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:16:43,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:16:43,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:16:43,881 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:16:43,882 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:16:43,884 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:16:43,884 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:16:43,885 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:16:43,885 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:16:43,885 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:16:43,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:16:43,886 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:16:43,887 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:16:43,887 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:16:43,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:16:43,888 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:16:43,888 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:16:43,888 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:16:43,889 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:16:43,889 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:16:43,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:16:43,890 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:16:43,890 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:16:43,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:16:43,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:43,891 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:16:43,891 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:16:43,892 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:16:43,892 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:16:43,892 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:16:43,893 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:16:43,893 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:16:43,894 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:16:43,894 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_5c04bc97-bb3e-4249-af37-a5992a0cd875/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2024-10-31 22:16:44,206 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:16:44,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:16:44,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:16:44,249 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:16:44,250 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:16:44,251 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/pthread/twostage_3.i Unable to find full path for "g++" [2024-10-31 22:16:46,382 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:16:46,810 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:16:46,810 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/sv-benchmarks/c/pthread/twostage_3.i [2024-10-31 22:16:46,837 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/data/a54c4cc6b/3d4f60b870a248b38f5d165e2a188323/FLAGd8aac26e9 [2024-10-31 22:16:46,856 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/data/a54c4cc6b/3d4f60b870a248b38f5d165e2a188323 [2024-10-31 22:16:46,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:16:46,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:16:46,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:46,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:16:46,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:16:46,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:46" (1/1) ... [2024-10-31 22:16:46,875 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1affa7f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:46, skipping insertion in model container [2024-10-31 22:16:46,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:16:46" (1/1) ... [2024-10-31 22:16:46,958 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:16:47,824 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:16:47,825 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:16:47,842 WARN L1657 CHandler]: Possible shadowing of function lock [2024-10-31 22:16:47,843 WARN L1657 CHandler]: Possible shadowing of function lock [2024-10-31 22:16:47,844 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:47,859 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:16:47,957 WARN L1657 CHandler]: Possible shadowing of function lock [2024-10-31 22:16:47,963 WARN L1657 CHandler]: Possible shadowing of function lock [2024-10-31 22:16:47,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:16:48,074 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:16:48,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48 WrapperNode [2024-10-31 22:16:48,076 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:16:48,077 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:48,077 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:16:48,078 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:16:48,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,121 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,175 INFO L138 Inliner]: procedures = 373, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 175 [2024-10-31 22:16:48,176 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:16:48,176 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:16:48,177 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:16:48,178 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:16:48,192 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,200 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,239 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-10-31 22:16:48,239 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,257 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,259 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,261 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,265 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:16:48,266 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:16:48,266 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:16:48,267 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:16:48,268 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (1/1) ... [2024-10-31 22:16:48,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:16:48,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:16:48,306 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:16:48,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:16:48,349 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2024-10-31 22:16:48,351 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2024-10-31 22:16:48,351 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2024-10-31 22:16:48,351 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2024-10-31 22:16:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-31 22:16:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-31 22:16:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-31 22:16:48,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:16:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:16:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-31 22:16:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:16:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:16:48,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-31 22:16:48,354 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-31 22:16:48,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:16:48,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:16:48,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:16:48,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:16:48,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-31 22:16:48,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:16:48,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:16:48,360 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 22:16:48,586 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:16:48,589 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:16:49,003 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:16:49,003 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:16:49,276 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:16:49,276 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-31 22:16:49,277 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:49 BoogieIcfgContainer [2024-10-31 22:16:49,277 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:16:49,279 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:16:49,279 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:16:49,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:16:49,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:16:46" (1/3) ... [2024-10-31 22:16:49,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c512b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:49, skipping insertion in model container [2024-10-31 22:16:49,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:16:48" (2/3) ... [2024-10-31 22:16:49,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c512b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:16:49, skipping insertion in model container [2024-10-31 22:16:49,285 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:16:49" (3/3) ... [2024-10-31 22:16:49,287 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2024-10-31 22:16:49,308 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:16:49,309 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-10-31 22:16:49,309 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:16:49,386 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-31 22:16:49,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 79 transitions, 178 flow [2024-10-31 22:16:49,505 INFO L124 PetriNetUnfolderBase]: 16/168 cut-off events. [2024-10-31 22:16:49,505 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-31 22:16:49,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 168 events. 16/168 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 805 event pairs, 0 based on Foata normal form. 0/108 useless extension candidates. Maximal degree in co-relation 86. Up to 7 conditions per place. [2024-10-31 22:16:49,510 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 79 transitions, 178 flow [2024-10-31 22:16:49,516 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 79 transitions, 178 flow [2024-10-31 22:16:49,526 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:16:49,532 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;@5dda21cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:16:49,533 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-31 22:16:49,536 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:16:49,536 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-31 22:16:49,537 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:16:49,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:49,537 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:16:49,538 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:16:49,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:49,544 INFO L85 PathProgramCache]: Analyzing trace with hash 16582774, now seen corresponding path program 1 times [2024-10-31 22:16:49,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:49,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049851822] [2024-10-31 22:16:49,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:49,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:49,775 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 22:16:49,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:49,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049851822] [2024-10-31 22:16:49,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049851822] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:49,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:49,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:16:49,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567564571] [2024-10-31 22:16:49,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:49,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:16:49,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:49,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:16:49,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:16:49,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 79 [2024-10-31 22:16:49,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 178 flow. Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 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 22:16:49,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:49,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 79 [2024-10-31 22:16:49,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:50,704 INFO L124 PetriNetUnfolderBase]: 1878/3765 cut-off events. [2024-10-31 22:16:50,704 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-10-31 22:16:50,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6822 conditions, 3765 events. 1878/3765 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 24618 event pairs, 1757 based on Foata normal form. 180/3673 useless extension candidates. Maximal degree in co-relation 6241. Up to 2976 conditions per place. [2024-10-31 22:16:50,741 INFO L140 encePairwiseOnDemand]: 74/79 looper letters, 42 selfloop transitions, 0 changer transitions 0/73 dead transitions. [2024-10-31 22:16:50,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 250 flow [2024-10-31 22:16:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-31 22:16:50,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-10-31 22:16:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 109 transitions. [2024-10-31 22:16:50,759 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.689873417721519 [2024-10-31 22:16:50,762 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 178 flow. Second operand 2 states and 109 transitions. [2024-10-31 22:16:50,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 250 flow [2024-10-31 22:16:50,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 73 transitions, 250 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:16:50,780 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 166 flow [2024-10-31 22:16:50,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-10-31 22:16:50,790 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2024-10-31 22:16:50,790 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 166 flow [2024-10-31 22:16:50,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 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 22:16:50,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:50,791 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:16:50,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:16:50,791 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:16:50,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:50,793 INFO L85 PathProgramCache]: Analyzing trace with hash 514120305, now seen corresponding path program 1 times [2024-10-31 22:16:50,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:50,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458685974] [2024-10-31 22:16:50,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:50,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:51,262 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 22:16:51,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:51,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458685974] [2024-10-31 22:16:51,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458685974] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:51,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:51,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:16:51,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721334901] [2024-10-31 22:16:51,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:51,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:16:51,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:16:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:51,368 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-10-31 22:16:51,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 22:16:51,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:51,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-10-31 22:16:51,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:52,159 INFO L124 PetriNetUnfolderBase]: 2141/4236 cut-off events. [2024-10-31 22:16:52,160 INFO L125 PetriNetUnfolderBase]: For 115/123 co-relation queries the response was YES. [2024-10-31 22:16:52,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7736 conditions, 4236 events. 2141/4236 cut-off events. For 115/123 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 29270 event pairs, 1506 based on Foata normal form. 8/3998 useless extension candidates. Maximal degree in co-relation 7731. Up to 2578 conditions per place. [2024-10-31 22:16:52,193 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 63 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2024-10-31 22:16:52,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 92 transitions, 334 flow [2024-10-31 22:16:52,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:16:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:16:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-10-31 22:16:52,196 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244725738396625 [2024-10-31 22:16:52,196 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 166 flow. Second operand 3 states and 148 transitions. [2024-10-31 22:16:52,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 92 transitions, 334 flow [2024-10-31 22:16:52,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 334 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-31 22:16:52,202 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 166 flow [2024-10-31 22:16:52,202 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-10-31 22:16:52,203 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, -2 predicate places. [2024-10-31 22:16:52,204 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 166 flow [2024-10-31 22:16:52,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 22:16:52,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:52,205 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-10-31 22:16:52,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:16:52,205 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:16:52,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:52,206 INFO L85 PathProgramCache]: Analyzing trace with hash 514120306, now seen corresponding path program 1 times [2024-10-31 22:16:52,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:52,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8365811] [2024-10-31 22:16:52,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:52,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:52,627 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 22:16:52,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:52,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8365811] [2024-10-31 22:16:52,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8365811] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:52,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:52,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:52,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884066568] [2024-10-31 22:16:52,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:52,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:16:52,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:52,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:16:52,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:52,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 79 [2024-10-31 22:16:52,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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 22:16:52,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:52,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 79 [2024-10-31 22:16:52,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:54,300 INFO L124 PetriNetUnfolderBase]: 4304/8666 cut-off events. [2024-10-31 22:16:54,301 INFO L125 PetriNetUnfolderBase]: For 512/512 co-relation queries the response was YES. [2024-10-31 22:16:54,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15903 conditions, 8666 events. 4304/8666 cut-off events. For 512/512 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 68024 event pairs, 3633 based on Foata normal form. 1/8163 useless extension candidates. Maximal degree in co-relation 15897. Up to 3417 conditions per place. [2024-10-31 22:16:54,374 INFO L140 encePairwiseOnDemand]: 73/79 looper letters, 93 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2024-10-31 22:16:54,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 124 transitions, 488 flow [2024-10-31 22:16:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:16:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:16:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-10-31 22:16:54,413 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.680379746835443 [2024-10-31 22:16:54,413 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 166 flow. Second operand 4 states and 215 transitions. [2024-10-31 22:16:54,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 124 transitions, 488 flow [2024-10-31 22:16:54,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 124 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:16:54,422 INFO L231 Difference]: Finished difference. Result has 76 places, 73 transitions, 188 flow [2024-10-31 22:16:54,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=188, PETRI_PLACES=76, PETRI_TRANSITIONS=73} [2024-10-31 22:16:54,424 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 1 predicate places. [2024-10-31 22:16:54,424 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 73 transitions, 188 flow [2024-10-31 22:16:54,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 5 states have internal predecessors, (149), 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 22:16:54,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:54,425 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:54,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-31 22:16:54,425 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:16:54,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1296173647, now seen corresponding path program 1 times [2024-10-31 22:16:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:54,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735189335] [2024-10-31 22:16:54,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:54,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:16:54,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:54,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735189335] [2024-10-31 22:16:54,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735189335] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:54,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:54,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:16:54,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042113940] [2024-10-31 22:16:54,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:54,651 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:16:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:54,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:16:54,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:16:54,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-10-31 22:16:54,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 73 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:54,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:54,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-10-31 22:16:54,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:56,326 INFO L124 PetriNetUnfolderBase]: 5428/10769 cut-off events. [2024-10-31 22:16:56,327 INFO L125 PetriNetUnfolderBase]: For 304/304 co-relation queries the response was YES. [2024-10-31 22:16:56,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19508 conditions, 10769 events. 5428/10769 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 85665 event pairs, 4070 based on Foata normal form. 1/9656 useless extension candidates. Maximal degree in co-relation 19500. Up to 8440 conditions per place. [2024-10-31 22:16:56,403 INFO L140 encePairwiseOnDemand]: 71/79 looper letters, 72 selfloop transitions, 7 changer transitions 2/105 dead transitions. [2024-10-31 22:16:56,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 105 transitions, 419 flow [2024-10-31 22:16:56,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:16:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:16:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 185 transitions. [2024-10-31 22:16:56,409 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5854430379746836 [2024-10-31 22:16:56,410 INFO L175 Difference]: Start difference. First operand has 76 places, 73 transitions, 188 flow. Second operand 4 states and 185 transitions. [2024-10-31 22:16:56,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 105 transitions, 419 flow [2024-10-31 22:16:56,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 105 transitions, 417 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:16:56,417 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 226 flow [2024-10-31 22:16:56,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-10-31 22:16:56,419 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 5 predicate places. [2024-10-31 22:16:56,420 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 226 flow [2024-10-31 22:16:56,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:16:56,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:56,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:56,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:16:56,421 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:16:56,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:56,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1526675220, now seen corresponding path program 1 times [2024-10-31 22:16:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:56,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230638639] [2024-10-31 22:16:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:56,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:56,484 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 22:16:56,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:56,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230638639] [2024-10-31 22:16:56,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230638639] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:56,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:56,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:16:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233673154] [2024-10-31 22:16:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:56,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:16:56,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:16:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:16:56,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-10-31 22:16:56,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 226 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 22:16:56,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:56,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-10-31 22:16:56,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:16:57,963 INFO L124 PetriNetUnfolderBase]: 4781/9625 cut-off events. [2024-10-31 22:16:57,963 INFO L125 PetriNetUnfolderBase]: For 878/878 co-relation queries the response was YES. [2024-10-31 22:16:57,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18240 conditions, 9625 events. 4781/9625 cut-off events. For 878/878 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 79496 event pairs, 3484 based on Foata normal form. 0/9240 useless extension candidates. Maximal degree in co-relation 18230. Up to 5857 conditions per place. [2024-10-31 22:16:58,037 INFO L140 encePairwiseOnDemand]: 75/79 looper letters, 66 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-10-31 22:16:58,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 95 transitions, 404 flow [2024-10-31 22:16:58,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:16:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:16:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-10-31 22:16:58,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6244725738396625 [2024-10-31 22:16:58,040 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 226 flow. Second operand 3 states and 148 transitions. [2024-10-31 22:16:58,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 95 transitions, 404 flow [2024-10-31 22:16:58,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 95 transitions, 393 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-31 22:16:58,050 INFO L231 Difference]: Finished difference. Result has 78 places, 74 transitions, 219 flow [2024-10-31 22:16:58,050 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=78, PETRI_TRANSITIONS=74} [2024-10-31 22:16:58,051 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 3 predicate places. [2024-10-31 22:16:58,051 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 74 transitions, 219 flow [2024-10-31 22:16:58,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 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 22:16:58,052 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:16:58,052 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:16:58,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:16:58,053 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:16:58,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:16:58,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1526675219, now seen corresponding path program 1 times [2024-10-31 22:16:58,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:16:58,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294464830] [2024-10-31 22:16:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:16:58,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:16:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:16:58,330 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 22:16:58,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:16:58,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294464830] [2024-10-31 22:16:58,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294464830] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:16:58,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:16:58,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-31 22:16:58,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030536815] [2024-10-31 22:16:58,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:16:58,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:16:58,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:16:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:16:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:16:58,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 79 [2024-10-31 22:16:58,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 74 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 22:16:58,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:16:58,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 79 [2024-10-31 22:16:58,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:00,081 INFO L124 PetriNetUnfolderBase]: 5920/11309 cut-off events. [2024-10-31 22:17:00,081 INFO L125 PetriNetUnfolderBase]: For 1377/1377 co-relation queries the response was YES. [2024-10-31 22:17:00,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22335 conditions, 11309 events. 5920/11309 cut-off events. For 1377/1377 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 92956 event pairs, 1087 based on Foata normal form. 0/10545 useless extension candidates. Maximal degree in co-relation 22325. Up to 3622 conditions per place. [2024-10-31 22:17:00,157 INFO L140 encePairwiseOnDemand]: 66/79 looper letters, 113 selfloop transitions, 16 changer transitions 0/151 dead transitions. [2024-10-31 22:17:00,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 151 transitions, 649 flow [2024-10-31 22:17:00,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:17:00,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:17:00,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 257 transitions. [2024-10-31 22:17:00,160 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6506329113924051 [2024-10-31 22:17:00,160 INFO L175 Difference]: Start difference. First operand has 78 places, 74 transitions, 219 flow. Second operand 5 states and 257 transitions. [2024-10-31 22:17:00,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 151 transitions, 649 flow [2024-10-31 22:17:00,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 151 transitions, 639 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:17:00,179 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 308 flow [2024-10-31 22:17:00,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-10-31 22:17:00,183 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 8 predicate places. [2024-10-31 22:17:00,185 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 308 flow [2024-10-31 22:17:00,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 22:17:00,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:00,186 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:00,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-31 22:17:00,186 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:17:00,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:00,187 INFO L85 PathProgramCache]: Analyzing trace with hash 870400787, now seen corresponding path program 1 times [2024-10-31 22:17:00,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:00,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622263723] [2024-10-31 22:17:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:00,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:00,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:00,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622263723] [2024-10-31 22:17:00,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622263723] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:17:00,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635575288] [2024-10-31 22:17:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:00,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:17:00,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:17:00,586 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:17:00,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:17:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:00,709 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-31 22:17:00,723 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:17:00,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2024-10-31 22:17:00,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-10-31 22:17:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,898 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:17:00,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-10-31 22:17:00,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-10-31 22:17:00,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,949 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:17:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:17:00,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2024-10-31 22:17:00,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:00,987 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:17:01,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:01,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:01,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-10-31 22:17:01,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:01,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:01,038 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:17:01,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-31 22:17:01,052 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:17:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:01,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:17:01,363 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-31 22:17:01,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:17:01,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635575288] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:17:01,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:17:01,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 11 [2024-10-31 22:17:01,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21646418] [2024-10-31 22:17:01,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:17:01,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-10-31 22:17:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-10-31 22:17:01,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-10-31 22:17:01,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 79 [2024-10-31 22:17:01,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 308 flow. Second operand has 13 states, 13 states have (on average 28.846153846153847) internal successors, (375), 13 states have internal predecessors, (375), 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 22:17:01,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:01,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 79 [2024-10-31 22:17:01,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:17:03,124 INFO L124 PetriNetUnfolderBase]: 2556/5107 cut-off events. [2024-10-31 22:17:03,124 INFO L125 PetriNetUnfolderBase]: For 2451/2451 co-relation queries the response was YES. [2024-10-31 22:17:03,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11470 conditions, 5107 events. 2556/5107 cut-off events. For 2451/2451 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 36601 event pairs, 1733 based on Foata normal form. 24/4931 useless extension candidates. Maximal degree in co-relation 11457. Up to 3497 conditions per place. [2024-10-31 22:17:03,173 INFO L140 encePairwiseOnDemand]: 70/79 looper letters, 97 selfloop transitions, 9 changer transitions 0/130 dead transitions. [2024-10-31 22:17:03,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 130 transitions, 624 flow [2024-10-31 22:17:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:17:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:17:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 260 transitions. [2024-10-31 22:17:03,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5485232067510548 [2024-10-31 22:17:03,176 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 308 flow. Second operand 6 states and 260 transitions. [2024-10-31 22:17:03,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 130 transitions, 624 flow [2024-10-31 22:17:03,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 130 transitions, 619 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:17:03,190 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 337 flow [2024-10-31 22:17:03,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=79, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=337, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-10-31 22:17:03,191 INFO L277 CegarLoopForPetriNet]: 75 programPoint places, 14 predicate places. [2024-10-31 22:17:03,191 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 337 flow [2024-10-31 22:17:03,192 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.846153846153847) internal successors, (375), 13 states have internal predecessors, (375), 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 22:17:03,192 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:03,192 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:03,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:17:03,393 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c04bc97-bb3e-4249-af37-a5992a0cd875/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:17:03,394 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-10-31 22:17:03,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:03,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1212621137, now seen corresponding path program 1 times [2024-10-31 22:17:03,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:03,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790775538] [2024-10-31 22:17:03,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:03,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:17:03,451 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-31 22:17:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-31 22:17:03,508 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-31 22:17:03,512 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-31 22:17:03,514 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-10-31 22:17:03,516 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX (13 of 15 remaining) [2024-10-31 22:17:03,520 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2024-10-31 22:17:03,520 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2024-10-31 22:17:03,521 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2024-10-31 22:17:03,521 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2024-10-31 22:17:03,521 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2024-10-31 22:17:03,521 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2024-10-31 22:17:03,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2024-10-31 22:17:03,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2024-10-31 22:17:03,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2024-10-31 22:17:03,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK (3 of 15 remaining) [2024-10-31 22:17:03,522 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 15 remaining) [2024-10-31 22:17:03,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2024-10-31 22:17:03,523 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2024-10-31 22:17:03,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-31 22:17:03,524 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:17:03,526 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-31 22:17:03,530 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-31 22:17:03,620 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-10-31 22:17:03,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 120 transitions, 284 flow [2024-10-31 22:17:03,721 INFO L124 PetriNetUnfolderBase]: 77/534 cut-off events. [2024-10-31 22:17:03,721 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2024-10-31 22:17:03,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 623 conditions, 534 events. 77/534 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 3487 event pairs, 2 based on Foata normal form. 0/350 useless extension candidates. Maximal degree in co-relation 333. Up to 32 conditions per place. [2024-10-31 22:17:03,725 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 120 transitions, 284 flow [2024-10-31 22:17:03,729 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 120 transitions, 284 flow [2024-10-31 22:17:03,731 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:17:03,732 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;@5dda21cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:17:03,732 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-10-31 22:17:03,734 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:17:03,735 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-10-31 22:17:03,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:17:03,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:17:03,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-31 22:17:03,735 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-10-31 22:17:03,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:17:03,736 INFO L85 PathProgramCache]: Analyzing trace with hash 20215286, now seen corresponding path program 1 times [2024-10-31 22:17:03,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:17:03,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845247434] [2024-10-31 22:17:03,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:17:03,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:17:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:17:03,748 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 22:17:03,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:17:03,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845247434] [2024-10-31 22:17:03,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845247434] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:17:03,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:17:03,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:17:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236028713] [2024-10-31 22:17:03,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:17:03,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-31 22:17:03,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:17:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-31 22:17:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-31 22:17:03,752 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 120 [2024-10-31 22:17:03,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 120 transitions, 284 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 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 22:17:03,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:17:03,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 120 [2024-10-31 22:17:03,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand