/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 14:35:42,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 14:35:42,875 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 14:35:42,881 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 14:35:42,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 14:35:42,917 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 14:35:42,918 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 14:35:42,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 14:35:42,919 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 14:35:42,920 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 14:35:42,920 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 14:35:42,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 14:35:42,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 14:35:42,924 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 14:35:42,924 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 14:35:42,924 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 14:35:42,924 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 14:35:42,925 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 14:35:42,925 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 14:35:42,925 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 14:35:42,925 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 14:35:42,926 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 14:35:42,927 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 14:35:42,927 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 14:35:42,927 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 14:35:42,928 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 14:35:42,928 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 14:35:42,928 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:35:42,928 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 14:35:42,929 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 14:35:42,929 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 14:35:42,930 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 14:35:42,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 14:35:42,930 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 14:35:42,930 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 14:35:42,930 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 14:35:43,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 14:35:43,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 14:35:43,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 14:35:43,278 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 14:35:43,280 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 14:35:43,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2023-08-26 14:35:44,522 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 14:35:44,756 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 14:35:44,756 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2023-08-26 14:35:44,775 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b57034ae/fb847c3bb1914f4b921197bd625236a4/FLAG37e625644 [2023-08-26 14:35:44,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b57034ae/fb847c3bb1914f4b921197bd625236a4 [2023-08-26 14:35:44,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 14:35:44,794 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 14:35:44,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 14:35:44,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 14:35:44,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 14:35:44,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:35:44" (1/1) ... [2023-08-26 14:35:44,798 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28c72fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:44, skipping insertion in model container [2023-08-26 14:35:44,798 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:35:44" (1/1) ... [2023-08-26 14:35:44,843 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 14:35:44,992 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 14:35:45,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:35:45,147 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 14:35:45,169 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 14:35:45,178 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 14:35:45,179 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 14:35:45,194 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:35:45,231 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:35:45,232 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:35:45,232 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 14:35:45,238 INFO L206 MainTranslator]: Completed translation [2023-08-26 14:35:45,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45 WrapperNode [2023-08-26 14:35:45,238 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 14:35:45,239 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 14:35:45,239 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 14:35:45,239 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 14:35:45,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,272 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,296 INFO L138 Inliner]: procedures = 174, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 81 [2023-08-26 14:35:45,296 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 14:35:45,297 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 14:35:45,297 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 14:35:45,297 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 14:35:45,305 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,305 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,312 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,325 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,327 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,328 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,329 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,331 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 14:35:45,331 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 14:35:45,331 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 14:35:45,332 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 14:35:45,332 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (1/1) ... [2023-08-26 14:35:45,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:35:45,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:35:45,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 14:35:45,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 14:35:45,408 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 14:35:45,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 14:35:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 14:35:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 14:35:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 14:35:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 14:35:45,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 14:35:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 14:35:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 14:35:45,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 14:35:45,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 14:35:45,411 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 14:35:45,517 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 14:35:45,519 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 14:35:45,632 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 14:35:45,671 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 14:35:45,671 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 14:35:45,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:35:45 BoogieIcfgContainer [2023-08-26 14:35:45,673 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 14:35:45,675 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 14:35:45,675 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 14:35:45,679 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 14:35:45,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:35:44" (1/3) ... [2023-08-26 14:35:45,680 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9bbee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:35:45, skipping insertion in model container [2023-08-26 14:35:45,680 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:35:45" (2/3) ... [2023-08-26 14:35:45,681 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9bbee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:35:45, skipping insertion in model container [2023-08-26 14:35:45,681 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:35:45" (3/3) ... [2023-08-26 14:35:45,682 INFO L112 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2023-08-26 14:35:45,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 14:35:45,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-26 14:35:45,698 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 14:35:45,728 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 14:35:45,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 119 flow [2023-08-26 14:35:45,824 INFO L124 PetriNetUnfolderBase]: 2/56 cut-off events. [2023-08-26 14:35:45,824 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:35:45,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 56 events. 2/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 31 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2023-08-26 14:35:45,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 57 transitions, 119 flow [2023-08-26 14:35:45,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 41 transitions, 85 flow [2023-08-26 14:35:45,833 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 14:35:45,841 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 45 places, 41 transitions, 85 flow [2023-08-26 14:35:45,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 45 places, 41 transitions, 85 flow [2023-08-26 14:35:45,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 41 transitions, 85 flow [2023-08-26 14:35:45,853 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2023-08-26 14:35:45,853 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:35:45,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-26 14:35:45,854 INFO L119 LiptonReduction]: Number of co-enabled transitions 180 [2023-08-26 14:35:47,430 INFO L134 LiptonReduction]: Checked pairs total: 336 [2023-08-26 14:35:47,430 INFO L136 LiptonReduction]: Total number of compositions: 35 [2023-08-26 14:35:47,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 14:35:47,446 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@3285a3f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 14:35:47,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-26 14:35:47,447 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 14:35:47,448 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 14:35:47,448 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:35:47,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:35:47,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 14:35:47,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 14:35:47,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:35:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash 251, now seen corresponding path program 1 times [2023-08-26 14:35:47,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:35:47,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88423695] [2023-08-26 14:35:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:35:47,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:35:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:35:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:35:47,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:35:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88423695] [2023-08-26 14:35:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88423695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:35:47,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:35:47,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 14:35:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533839018] [2023-08-26 14:35:47,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:35:47,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 14:35:47,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:35:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 14:35:47,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 14:35:47,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 92 [2023-08-26 14:35:47,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 10 transitions, 23 flow. Second operand has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 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) [2023-08-26 14:35:47,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:35:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 92 [2023-08-26 14:35:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:35:47,629 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-08-26 14:35:47,629 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:35:47,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 21 events. 6/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 35 event pairs, 6 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 36. Up to 20 conditions per place. [2023-08-26 14:35:47,631 INFO L140 encePairwiseOnDemand]: 90/92 looper letters, 7 selfloop transitions, 0 changer transitions 0/8 dead transitions. [2023-08-26 14:35:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 13 places, 8 transitions, 33 flow [2023-08-26 14:35:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 14:35:47,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 14:35:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 111 transitions. [2023-08-26 14:35:47,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6032608695652174 [2023-08-26 14:35:47,644 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 111 transitions. [2023-08-26 14:35:47,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 111 transitions. [2023-08-26 14:35:47,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:35:47,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 111 transitions. [2023-08-26 14:35:47,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 55.5) internal successors, (111), 2 states have internal predecessors, (111), 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) [2023-08-26 14:35:47,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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) [2023-08-26 14:35:47,657 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 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) [2023-08-26 14:35:47,659 INFO L175 Difference]: Start difference. First operand has 14 places, 10 transitions, 23 flow. Second operand 2 states and 111 transitions. [2023-08-26 14:35:47,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 13 places, 8 transitions, 33 flow [2023-08-26 14:35:47,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 12 places, 8 transitions, 32 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:35:47,664 INFO L231 Difference]: Finished difference. Result has 12 places, 8 transitions, 18 flow [2023-08-26 14:35:47,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=18, PETRI_PLACES=12, PETRI_TRANSITIONS=8} [2023-08-26 14:35:47,669 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, -2 predicate places. [2023-08-26 14:35:47,669 INFO L495 AbstractCegarLoop]: Abstraction has has 12 places, 8 transitions, 18 flow [2023-08-26 14:35:47,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 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) [2023-08-26 14:35:47,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:35:47,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:35:47,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 14:35:47,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 14:35:47,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:35:47,671 INFO L85 PathProgramCache]: Analyzing trace with hash 235680752, now seen corresponding path program 1 times [2023-08-26 14:35:47,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:35:47,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646936633] [2023-08-26 14:35:47,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:35:47,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:35:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:35:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:35:47,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:35:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646936633] [2023-08-26 14:35:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646936633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:35:47,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:35:47,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:35:47,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108727228] [2023-08-26 14:35:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:35:47,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:35:47,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:35:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:35:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:35:47,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 92 [2023-08-26 14:35:47,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 18 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2023-08-26 14:35:47,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:35:47,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 92 [2023-08-26 14:35:47,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:35:47,865 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-08-26 14:35:47,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:35:47,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 23 events. 6/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 3 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 48. Up to 12 conditions per place. [2023-08-26 14:35:47,866 INFO L140 encePairwiseOnDemand]: 88/92 looper letters, 6 selfloop transitions, 2 changer transitions 3/11 dead transitions. [2023-08-26 14:35:47,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 11 transitions, 46 flow [2023-08-26 14:35:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:35:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:35:47,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 144 transitions. [2023-08-26 14:35:47,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2023-08-26 14:35:47,869 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 144 transitions. [2023-08-26 14:35:47,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 144 transitions. [2023-08-26 14:35:47,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:35:47,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 144 transitions. [2023-08-26 14:35:47,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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) [2023-08-26 14:35:47,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-08-26 14:35:47,872 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-08-26 14:35:47,872 INFO L175 Difference]: Start difference. First operand has 12 places, 8 transitions, 18 flow. Second operand 3 states and 144 transitions. [2023-08-26 14:35:47,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 11 transitions, 46 flow [2023-08-26 14:35:47,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 14:35:47,873 INFO L231 Difference]: Finished difference. Result has 16 places, 8 transitions, 30 flow [2023-08-26 14:35:47,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=16, PETRI_TRANSITIONS=8} [2023-08-26 14:35:47,874 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2023-08-26 14:35:47,874 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 8 transitions, 30 flow [2023-08-26 14:35:47,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 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) [2023-08-26 14:35:47,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:35:47,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:35:47,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 14:35:47,876 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 14:35:47,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:35:47,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1144052456, now seen corresponding path program 1 times [2023-08-26 14:35:47,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:35:47,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621244933] [2023-08-26 14:35:47,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:35:47,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:35:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:35:47,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:35:47,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:35:47,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621244933] [2023-08-26 14:35:47,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621244933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:35:47,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:35:47,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:35:47,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834914352] [2023-08-26 14:35:47,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:35:47,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:35:47,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:35:47,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:35:47,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:35:47,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 92 [2023-08-26 14:35:47,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 8 transitions, 30 flow. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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) [2023-08-26 14:35:47,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:35:47,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 92 [2023-08-26 14:35:47,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:35:47,993 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-26 14:35:47,994 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 14:35:47,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 16 events. 2/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 1 based on Foata normal form. 2/18 useless extension candidates. Maximal degree in co-relation 42. Up to 10 conditions per place. [2023-08-26 14:35:47,994 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 5 selfloop transitions, 2 changer transitions 1/9 dead transitions. [2023-08-26 14:35:47,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 9 transitions, 48 flow [2023-08-26 14:35:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 14:35:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 14:35:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2023-08-26 14:35:47,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461956521739131 [2023-08-26 14:35:47,996 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 201 transitions. [2023-08-26 14:35:47,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 201 transitions. [2023-08-26 14:35:47,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:35:47,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 201 transitions. [2023-08-26 14:35:47,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 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) [2023-08-26 14:35:47,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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) [2023-08-26 14:35:47,999 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 92.0) internal successors, (460), 5 states have internal predecessors, (460), 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) [2023-08-26 14:35:47,999 INFO L175 Difference]: Start difference. First operand has 16 places, 8 transitions, 30 flow. Second operand 4 states and 201 transitions. [2023-08-26 14:35:47,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 9 transitions, 48 flow [2023-08-26 14:35:47,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 9 transitions, 44 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:35:48,000 INFO L231 Difference]: Finished difference. Result has 18 places, 8 transitions, 33 flow [2023-08-26 14:35:48,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=33, PETRI_PLACES=18, PETRI_TRANSITIONS=8} [2023-08-26 14:35:48,001 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, 4 predicate places. [2023-08-26 14:35:48,001 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 8 transitions, 33 flow [2023-08-26 14:35:48,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 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) [2023-08-26 14:35:48,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:35:48,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:35:48,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 14:35:48,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 14:35:48,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:35:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1166395706, now seen corresponding path program 2 times [2023-08-26 14:35:48,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:35:48,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619990688] [2023-08-26 14:35:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:35:48,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:35:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:35:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:35:48,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:35:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619990688] [2023-08-26 14:35:48,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619990688] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:35:48,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:35:48,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:35:48,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589866724] [2023-08-26 14:35:48,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:35:48,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:35:48,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:35:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:35:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:35:48,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 92 [2023-08-26 14:35:48,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 8 transitions, 33 flow. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2023-08-26 14:35:48,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:35:48,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 92 [2023-08-26 14:35:48,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:35:48,159 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-26 14:35:48,159 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 14:35:48,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 8 events. 0/8 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/9 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-08-26 14:35:48,159 INFO L140 encePairwiseOnDemand]: 89/92 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-26 14:35:48,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 7 transitions, 41 flow [2023-08-26 14:35:48,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:35:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:35:48,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2023-08-26 14:35:48,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579710144927537 [2023-08-26 14:35:48,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 154 transitions. [2023-08-26 14:35:48,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 154 transitions. [2023-08-26 14:35:48,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:35:48,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 154 transitions. [2023-08-26 14:35:48,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 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) [2023-08-26 14:35:48,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-08-26 14:35:48,163 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 92.0) internal successors, (368), 4 states have internal predecessors, (368), 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) [2023-08-26 14:35:48,163 INFO L175 Difference]: Start difference. First operand has 18 places, 8 transitions, 33 flow. Second operand 3 states and 154 transitions. [2023-08-26 14:35:48,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 7 transitions, 41 flow [2023-08-26 14:35:48,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 7 transitions, 36 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 14:35:48,164 INFO L231 Difference]: Finished difference. Result has 16 places, 0 transitions, 0 flow [2023-08-26 14:35:48,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=92, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=16, PETRI_TRANSITIONS=0} [2023-08-26 14:35:48,167 INFO L281 CegarLoopForPetriNet]: 14 programPoint places, 2 predicate places. [2023-08-26 14:35:48,167 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 0 transitions, 0 flow [2023-08-26 14:35:48,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 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) [2023-08-26 14:35:48,169 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 4 remaining) [2023-08-26 14:35:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 4 remaining) [2023-08-26 14:35:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2023-08-26 14:35:48,170 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-26 14:35:48,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 14:35:48,170 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-08-26 14:35:48,173 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 14:35:48,173 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 14:35:48,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:35:48 BasicIcfg [2023-08-26 14:35:48,176 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 14:35:48,177 INFO L158 Benchmark]: Toolchain (without parser) took 3382.83ms. Allocated memory was 375.4MB in the beginning and 450.9MB in the end (delta: 75.5MB). Free memory was 350.8MB in the beginning and 327.3MB in the end (delta: 23.5MB). Peak memory consumption was 100.5MB. Max. memory is 16.0GB. [2023-08-26 14:35:48,177 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 375.4MB. Free memory is still 351.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 14:35:48,178 INFO L158 Benchmark]: CACSL2BoogieTranslator took 443.68ms. Allocated memory is still 375.4MB. Free memory was 350.8MB in the beginning and 331.1MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 14:35:48,178 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.96ms. Allocated memory is still 375.4MB. Free memory was 331.1MB in the beginning and 329.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:35:48,178 INFO L158 Benchmark]: Boogie Preprocessor took 33.59ms. Allocated memory is still 375.4MB. Free memory was 329.0MB in the beginning and 327.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:35:48,179 INFO L158 Benchmark]: RCFGBuilder took 341.74ms. Allocated memory is still 375.4MB. Free memory was 327.3MB in the beginning and 311.8MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 14:35:48,179 INFO L158 Benchmark]: TraceAbstraction took 2501.37ms. Allocated memory was 375.4MB in the beginning and 450.9MB in the end (delta: 75.5MB). Free memory was 311.4MB in the beginning and 327.3MB in the end (delta: -15.9MB). Peak memory consumption was 62.7MB. Max. memory is 16.0GB. [2023-08-26 14:35:48,182 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 375.4MB. Free memory is still 351.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 443.68ms. Allocated memory is still 375.4MB. Free memory was 350.8MB in the beginning and 331.1MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.96ms. Allocated memory is still 375.4MB. Free memory was 331.1MB in the beginning and 329.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.59ms. Allocated memory is still 375.4MB. Free memory was 329.0MB in the beginning and 327.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 341.74ms. Allocated memory is still 375.4MB. Free memory was 327.3MB in the beginning and 311.8MB in the end (delta: 15.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 2501.37ms. Allocated memory was 375.4MB in the beginning and 450.9MB in the end (delta: 75.5MB). Free memory was 311.4MB in the beginning and 327.3MB in the end (delta: -15.9MB). Peak memory consumption was 62.7MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 45 PlacesBefore, 14 PlacesAfterwards, 41 TransitionsBefore, 10 TransitionsAfterwards, 180 CoEnabledTransitionPairs, 6 FixpointIterations, 20 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 35 TotalNumberOfCompositions, 336 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 212, independent: 159, independent conditional: 0, independent unconditional: 159, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 103, independent: 90, independent conditional: 0, independent unconditional: 90, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 212, independent: 69, independent conditional: 0, independent unconditional: 69, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 103, unknown conditional: 0, unknown unconditional: 103] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 64 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.4s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41 IncrementalHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 1 mSDtfsCounter, 41 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=3, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 26 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 14:35:48,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...