/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 PROGRAM_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/weaver/spaghetti.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:20:13,892 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:20:13,960 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 20:20:13,965 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:20:13,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:20:13,995 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:20:13,996 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:20:13,996 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:20:13,997 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:20:14,000 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:20:14,001 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:20:14,001 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:20:14,001 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:20:14,002 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:20:14,002 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:20:14,003 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:20:14,003 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:20:14,003 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:20:14,003 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:20:14,004 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:20:14,004 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:20:14,004 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:20:14,005 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:20:14,005 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:20:14,005 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:20:14,006 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:20:14,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:20:14,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:14,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:20:14,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:20:14,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:20:14,008 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:20:14,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:20:14,008 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:20:14,008 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:20:14,009 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:20:14,315 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:20:14,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:20:14,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:20:14,347 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:20:14,348 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:20:14,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/spaghetti.wvr.c [2023-08-26 20:20:15,494 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:20:15,671 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:20:15,672 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/spaghetti.wvr.c [2023-08-26 20:20:15,678 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8164b5cb1/89fc40cc2c7a4842a5b89564d1f9f231/FLAG49b53a097 [2023-08-26 20:20:15,688 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8164b5cb1/89fc40cc2c7a4842a5b89564d1f9f231 [2023-08-26 20:20:15,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:20:15,691 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:20:15,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:15,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:20:15,695 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:20:15,695 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,696 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1666b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15, skipping insertion in model container [2023-08-26 20:20:15,696 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,715 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:20:15,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:15,857 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:20:15,876 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:15,882 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:15,882 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:20:15,888 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:20:15,890 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15 WrapperNode [2023-08-26 20:20:15,890 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:15,891 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:15,891 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:20:15,891 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:20:15,897 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,906 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,922 INFO L138 Inliner]: procedures = 23, calls = 60, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2023-08-26 20:20:15,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:15,923 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:20:15,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:20:15,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:20:15,931 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,931 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,944 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,948 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,951 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,952 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,953 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,955 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:20:15,956 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:20:15,956 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:20:15,956 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:20:15,969 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (1/1) ... [2023-08-26 20:20:15,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:15,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:15,996 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 20:20:16,028 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 20:20:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:20:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:20:16,037 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:20:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:20:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:20:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 20:20:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 20:20:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 20:20:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 20:20:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:20:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:20:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:20:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:20:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:20:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:20:16,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:20:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:20:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:20:16,042 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 20:20:16,153 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:20:16,155 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:20:16,470 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:20:16,486 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:20:16,486 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-26 20:20:16,488 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:16 BoogieIcfgContainer [2023-08-26 20:20:16,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:20:16,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:20:16,490 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:20:16,493 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:20:16,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:20:15" (1/3) ... [2023-08-26 20:20:16,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecb120e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:16, skipping insertion in model container [2023-08-26 20:20:16,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:15" (2/3) ... [2023-08-26 20:20:16,494 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecb120e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:16, skipping insertion in model container [2023-08-26 20:20:16,494 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:16" (3/3) ... [2023-08-26 20:20:16,495 INFO L112 eAbstractionObserver]: Analyzing ICFG spaghetti.wvr.c [2023-08-26 20:20:16,511 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:20:16,512 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 20:20:16,512 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:20:16,588 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 20:20:16,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 144 transitions, 320 flow [2023-08-26 20:20:16,668 INFO L124 PetriNetUnfolderBase]: 9/140 cut-off events. [2023-08-26 20:20:16,669 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:20:16,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 140 events. 9/140 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 180 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-26 20:20:16,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 144 transitions, 320 flow [2023-08-26 20:20:16,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 127 transitions, 278 flow [2023-08-26 20:20:16,685 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:20:16,694 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 127 transitions, 278 flow [2023-08-26 20:20:16,696 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 127 transitions, 278 flow [2023-08-26 20:20:16,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 127 transitions, 278 flow [2023-08-26 20:20:16,728 INFO L124 PetriNetUnfolderBase]: 9/127 cut-off events. [2023-08-26 20:20:16,728 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 20:20:16,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 127 events. 9/127 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 179 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 91. Up to 2 conditions per place. [2023-08-26 20:20:16,750 INFO L119 LiptonReduction]: Number of co-enabled transitions 3846 [2023-08-26 20:20:20,433 INFO L134 LiptonReduction]: Checked pairs total: 6483 [2023-08-26 20:20:20,434 INFO L136 LiptonReduction]: Total number of compositions: 125 [2023-08-26 20:20:20,445 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:20:20,450 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;@628fc01d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:20:20,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-26 20:20:20,452 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:20:20,452 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 20:20:20,452 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:20:20,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:20,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:20:20,453 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:20,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash 538, now seen corresponding path program 1 times [2023-08-26 20:20:20,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:20,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674090257] [2023-08-26 20:20:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:20,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:20,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:20,552 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 20:20:20,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:20,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674090257] [2023-08-26 20:20:20,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674090257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:20,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:20,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:20:20,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837159130] [2023-08-26 20:20:20,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:20,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:20:20,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:20,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:20:20,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:20:20,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 269 [2023-08-26 20:20:20,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 118 flow. Second operand has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 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 20:20:20,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:20,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 269 [2023-08-26 20:20:20,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:20,796 INFO L124 PetriNetUnfolderBase]: 1488/2167 cut-off events. [2023-08-26 20:20:20,797 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-08-26 20:20:20,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4260 conditions, 2167 events. 1488/2167 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8870 event pairs, 1328 based on Foata normal form. 0/1145 useless extension candidates. Maximal degree in co-relation 3348. Up to 1968 conditions per place. [2023-08-26 20:20:20,818 INFO L140 encePairwiseOnDemand]: 267/269 looper letters, 39 selfloop transitions, 0 changer transitions 0/45 dead transitions. [2023-08-26 20:20:20,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 192 flow [2023-08-26 20:20:20,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:20:20,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:20:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 297 transitions. [2023-08-26 20:20:20,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520446096654275 [2023-08-26 20:20:20,830 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 297 transitions. [2023-08-26 20:20:20,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 297 transitions. [2023-08-26 20:20:20,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:20,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 297 transitions. [2023-08-26 20:20:20,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 148.5) internal successors, (297), 2 states have internal predecessors, (297), 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 20:20:20,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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 20:20:20,842 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 269.0) internal successors, (807), 3 states have internal predecessors, (807), 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 20:20:20,843 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 118 flow. Second operand 2 states and 297 transitions. [2023-08-26 20:20:20,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 192 flow [2023-08-26 20:20:20,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 176 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-26 20:20:20,850 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 98 flow [2023-08-26 20:20:20,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=98, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-26 20:20:20,855 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2023-08-26 20:20:20,855 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 98 flow [2023-08-26 20:20:20,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 128.5) internal successors, (257), 2 states have internal predecessors, (257), 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 20:20:20,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:20,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:20,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:20:20,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:20,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash 530174, now seen corresponding path program 1 times [2023-08-26 20:20:20,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:20,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056756183] [2023-08-26 20:20:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:20,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:21,166 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 20:20:21,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:21,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056756183] [2023-08-26 20:20:21,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056756183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:21,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:21,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:21,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337380438] [2023-08-26 20:20:21,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:21,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:21,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:21,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:21,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:21,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 269 [2023-08-26 20:20:21,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:21,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:21,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 269 [2023-08-26 20:20:21,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:21,336 INFO L124 PetriNetUnfolderBase]: 1431/2079 cut-off events. [2023-08-26 20:20:21,337 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:21,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4003 conditions, 2079 events. 1431/2079 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8438 event pairs, 1272 based on Foata normal form. 0/1115 useless extension candidates. Maximal degree in co-relation 4000. Up to 1881 conditions per place. [2023-08-26 20:20:21,352 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 36 selfloop transitions, 1 changer transitions 0/43 dead transitions. [2023-08-26 20:20:21,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 168 flow [2023-08-26 20:20:21,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-26 20:20:21,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42379182156133827 [2023-08-26 20:20:21,359 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-26 20:20:21,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-26 20:20:21,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:21,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-26 20:20:21,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 20:20:21,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:21,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:21,366 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 98 flow. Second operand 3 states and 342 transitions. [2023-08-26 20:20:21,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 168 flow [2023-08-26 20:20:21,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:20:21,370 INFO L231 Difference]: Finished difference. Result has 47 places, 43 transitions, 96 flow [2023-08-26 20:20:21,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=47, PETRI_TRANSITIONS=43} [2023-08-26 20:20:21,371 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2023-08-26 20:20:21,371 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 43 transitions, 96 flow [2023-08-26 20:20:21,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:21,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:21,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:20:21,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:20:21,376 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:21,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash 530175, now seen corresponding path program 1 times [2023-08-26 20:20:21,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:21,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048874720] [2023-08-26 20:20:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:21,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:21,456 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 20:20:21,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:21,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048874720] [2023-08-26 20:20:21,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048874720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:21,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:21,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:21,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475420364] [2023-08-26 20:20:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:21,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:21,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 269 [2023-08-26 20:20:21,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 43 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 20:20:21,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:21,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 269 [2023-08-26 20:20:21,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:21,609 INFO L124 PetriNetUnfolderBase]: 1374/1991 cut-off events. [2023-08-26 20:20:21,610 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:21,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3831 conditions, 1991 events. 1374/1991 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8011 event pairs, 1216 based on Foata normal form. 0/1085 useless extension candidates. Maximal degree in co-relation 3827. Up to 1795 conditions per place. [2023-08-26 20:20:21,627 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 34 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 20:20:21,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 162 flow [2023-08-26 20:20:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-26 20:20:21,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40644361833952913 [2023-08-26 20:20:21,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-26 20:20:21,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-26 20:20:21,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:21,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-26 20:20:21,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 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 20:20:21,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:21,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:21,633 INFO L175 Difference]: Start difference. First operand has 47 places, 43 transitions, 96 flow. Second operand 3 states and 328 transitions. [2023-08-26 20:20:21,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 162 flow [2023-08-26 20:20:21,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:21,634 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 93 flow [2023-08-26 20:20:21,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-26 20:20:21,635 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -10 predicate places. [2023-08-26 20:20:21,635 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 93 flow [2023-08-26 20:20:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 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 20:20:21,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:21,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:21,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:20:21,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:21,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash 509511220, now seen corresponding path program 1 times [2023-08-26 20:20:21,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:21,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364075458] [2023-08-26 20:20:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:21,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:21,718 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 20:20:21,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:21,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364075458] [2023-08-26 20:20:21,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364075458] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:21,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:21,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605306757] [2023-08-26 20:20:21,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:21,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:21,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 269 [2023-08-26 20:20:21,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:21,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:21,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 269 [2023-08-26 20:20:21,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:21,882 INFO L124 PetriNetUnfolderBase]: 1347/1946 cut-off events. [2023-08-26 20:20:21,882 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:21,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3745 conditions, 1946 events. 1347/1946 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7798 event pairs, 1192 based on Foata normal form. 0/1070 useless extension candidates. Maximal degree in co-relation 3741. Up to 1753 conditions per place. [2023-08-26 20:20:21,897 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 32 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-26 20:20:21,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 155 flow [2023-08-26 20:20:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:21,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-26 20:20:21,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4188351920693928 [2023-08-26 20:20:21,900 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-26 20:20:21,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-26 20:20:21,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:21,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-26 20:20:21,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 20:20:21,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:21,903 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:21,903 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 93 flow. Second operand 3 states and 338 transitions. [2023-08-26 20:20:21,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 155 flow [2023-08-26 20:20:21,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:21,905 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 90 flow [2023-08-26 20:20:21,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-08-26 20:20:21,905 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -11 predicate places. [2023-08-26 20:20:21,906 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 90 flow [2023-08-26 20:20:21,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:21,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:21,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:20:21,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:20:21,906 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:21,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:21,907 INFO L85 PathProgramCache]: Analyzing trace with hash 509511221, now seen corresponding path program 1 times [2023-08-26 20:20:21,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:21,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591155889] [2023-08-26 20:20:21,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:21,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:21,968 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 20:20:21,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:21,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591155889] [2023-08-26 20:20:21,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591155889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:21,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:21,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:21,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549382083] [2023-08-26 20:20:21,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:21,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:21,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:21,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:21,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:21,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 269 [2023-08-26 20:20:21,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 20:20:21,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:21,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 269 [2023-08-26 20:20:21,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:22,092 INFO L124 PetriNetUnfolderBase]: 1320/1901 cut-off events. [2023-08-26 20:20:22,093 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:22,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3659 conditions, 1901 events. 1320/1901 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 7630 event pairs, 1168 based on Foata normal form. 0/1055 useless extension candidates. Maximal degree in co-relation 3655. Up to 1711 conditions per place. [2023-08-26 20:20:22,106 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 30 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 20:20:22,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 148 flow [2023-08-26 20:20:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 324 transitions. [2023-08-26 20:20:22,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40148698884758366 [2023-08-26 20:20:22,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 324 transitions. [2023-08-26 20:20:22,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 324 transitions. [2023-08-26 20:20:22,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:22,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 324 transitions. [2023-08-26 20:20:22,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.0) internal successors, (324), 3 states have internal predecessors, (324), 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 20:20:22,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,111 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,111 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 90 flow. Second operand 3 states and 324 transitions. [2023-08-26 20:20:22,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 148 flow [2023-08-26 20:20:22,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 37 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:22,113 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 87 flow [2023-08-26 20:20:22,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=87, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-26 20:20:22,113 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -12 predicate places. [2023-08-26 20:20:22,113 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 87 flow [2023-08-26 20:20:22,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 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 20:20:22,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:22,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:22,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:20:22,114 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:22,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:22,115 INFO L85 PathProgramCache]: Analyzing trace with hash 14021978, now seen corresponding path program 1 times [2023-08-26 20:20:22,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:22,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069755379] [2023-08-26 20:20:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:22,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:22,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:22,166 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 20:20:22,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069755379] [2023-08-26 20:20:22,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069755379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:22,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:22,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:22,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220482063] [2023-08-26 20:20:22,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:22,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:22,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:22,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:22,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:22,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 269 [2023-08-26 20:20:22,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 20:20:22,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:22,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 269 [2023-08-26 20:20:22,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:22,308 INFO L124 PetriNetUnfolderBase]: 1237/1761 cut-off events. [2023-08-26 20:20:22,308 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:22,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3434 conditions, 1761 events. 1237/1761 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 6769 event pairs, 1112 based on Foata normal form. 0/973 useless extension candidates. Maximal degree in co-relation 3430. Up to 1625 conditions per place. [2023-08-26 20:20:22,323 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 28 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-26 20:20:22,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 35 transitions, 141 flow [2023-08-26 20:20:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:22,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 20:20:22,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138785625774473 [2023-08-26 20:20:22,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 20:20:22,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 20:20:22,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:22,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 20:20:22,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 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 20:20:22,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,330 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,330 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 87 flow. Second operand 3 states and 334 transitions. [2023-08-26 20:20:22,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 35 transitions, 141 flow [2023-08-26 20:20:22,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:22,333 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 84 flow [2023-08-26 20:20:22,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2023-08-26 20:20:22,335 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -13 predicate places. [2023-08-26 20:20:22,338 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 84 flow [2023-08-26 20:20:22,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 20:20:22,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:22,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:22,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:20:22,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:22,339 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash 14021977, now seen corresponding path program 1 times [2023-08-26 20:20:22,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:22,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548311567] [2023-08-26 20:20:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:22,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:22,400 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 20:20:22,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:22,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548311567] [2023-08-26 20:20:22,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548311567] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:22,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:22,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:22,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299194453] [2023-08-26 20:20:22,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:22,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:22,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:22,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:22,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:22,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 269 [2023-08-26 20:20:22,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 20:20:22,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:22,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 269 [2023-08-26 20:20:22,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:22,547 INFO L124 PetriNetUnfolderBase]: 1190/1693 cut-off events. [2023-08-26 20:20:22,547 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:22,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 1693 events. 1190/1693 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 6480 event pairs, 1056 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 3277. Up to 1539 conditions per place. [2023-08-26 20:20:22,560 INFO L140 encePairwiseOnDemand]: 266/269 looper letters, 26 selfloop transitions, 1 changer transitions 0/33 dead transitions. [2023-08-26 20:20:22,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 33 transitions, 134 flow [2023-08-26 20:20:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:22,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:22,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2023-08-26 20:20:22,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965303593556382 [2023-08-26 20:20:22,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2023-08-26 20:20:22,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2023-08-26 20:20:22,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:22,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2023-08-26 20:20:22,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 20:20:22,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,566 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 84 flow. Second operand 3 states and 320 transitions. [2023-08-26 20:20:22,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 33 transitions, 134 flow [2023-08-26 20:20:22,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 33 transitions, 133 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:22,567 INFO L231 Difference]: Finished difference. Result has 42 places, 33 transitions, 81 flow [2023-08-26 20:20:22,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=42, PETRI_TRANSITIONS=33} [2023-08-26 20:20:22,568 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -14 predicate places. [2023-08-26 20:20:22,568 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 33 transitions, 81 flow [2023-08-26 20:20:22,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 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 20:20:22,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:22,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:22,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:20:22,569 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:22,569 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:22,570 INFO L85 PathProgramCache]: Analyzing trace with hash 590229173, now seen corresponding path program 1 times [2023-08-26 20:20:22,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:22,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303089535] [2023-08-26 20:20:22,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:22,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:22,789 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 20:20:22,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:22,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303089535] [2023-08-26 20:20:22,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303089535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:22,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:22,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 20:20:22,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993710128] [2023-08-26 20:20:22,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:22,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 20:20:22,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:22,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 20:20:22,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 20:20:22,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 269 [2023-08-26 20:20:22,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 33 transitions, 81 flow. Second operand has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 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 20:20:22,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:22,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 269 [2023-08-26 20:20:22,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:22,900 INFO L124 PetriNetUnfolderBase]: 947/1369 cut-off events. [2023-08-26 20:20:22,900 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:22,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2661 conditions, 1369 events. 947/1369 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 5078 event pairs, 840 based on Foata normal form. 0/828 useless extension candidates. Maximal degree in co-relation 2657. Up to 1242 conditions per place. [2023-08-26 20:20:22,908 INFO L140 encePairwiseOnDemand]: 267/269 looper letters, 25 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-26 20:20:22,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 32 transitions, 131 flow [2023-08-26 20:20:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:22,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 291 transitions. [2023-08-26 20:20:22,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36059479553903345 [2023-08-26 20:20:22,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 291 transitions. [2023-08-26 20:20:22,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 291 transitions. [2023-08-26 20:20:22,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:22,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 291 transitions. [2023-08-26 20:20:22,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:20:22,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,913 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:22,913 INFO L175 Difference]: Start difference. First operand has 42 places, 33 transitions, 81 flow. Second operand 3 states and 291 transitions. [2023-08-26 20:20:22,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 32 transitions, 131 flow [2023-08-26 20:20:22,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 32 transitions, 130 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:22,914 INFO L231 Difference]: Finished difference. Result has 42 places, 32 transitions, 80 flow [2023-08-26 20:20:22,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=42, PETRI_TRANSITIONS=32} [2023-08-26 20:20:22,915 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -14 predicate places. [2023-08-26 20:20:22,915 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 32 transitions, 80 flow [2023-08-26 20:20:22,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.5) internal successors, (537), 6 states have internal predecessors, (537), 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 20:20:22,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:22,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:22,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:20:22,916 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:22,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:22,916 INFO L85 PathProgramCache]: Analyzing trace with hash 590229174, now seen corresponding path program 1 times [2023-08-26 20:20:22,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:22,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521047085] [2023-08-26 20:20:22,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:22,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:23,067 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 20:20:23,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:23,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521047085] [2023-08-26 20:20:23,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521047085] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:23,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:23,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:20:23,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692069663] [2023-08-26 20:20:23,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:23,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:20:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:20:23,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:20:23,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 269 [2023-08-26 20:20:23,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 20:20:23,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:23,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 269 [2023-08-26 20:20:23,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:23,147 INFO L124 PetriNetUnfolderBase]: 704/1045 cut-off events. [2023-08-26 20:20:23,148 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2023-08-26 20:20:23,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2041 conditions, 1045 events. 704/1045 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3734 event pairs, 624 based on Foata normal form. 0/693 useless extension candidates. Maximal degree in co-relation 2037. Up to 945 conditions per place. [2023-08-26 20:20:23,153 INFO L140 encePairwiseOnDemand]: 267/269 looper letters, 24 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-26 20:20:23,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 31 transitions, 128 flow [2023-08-26 20:20:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:20:23,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:20:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-08-26 20:20:23,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076827757125155 [2023-08-26 20:20:23,155 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-08-26 20:20:23,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-08-26 20:20:23,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:23,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-08-26 20:20:23,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 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 20:20:23,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:23,158 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 269.0) internal successors, (1076), 4 states have internal predecessors, (1076), 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 20:20:23,158 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 80 flow. Second operand 3 states and 329 transitions. [2023-08-26 20:20:23,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 31 transitions, 128 flow [2023-08-26 20:20:23,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:23,159 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 79 flow [2023-08-26 20:20:23,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-08-26 20:20:23,160 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -14 predicate places. [2023-08-26 20:20:23,160 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 79 flow [2023-08-26 20:20:23,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 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 20:20:23,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:23,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:23,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:20:23,161 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:23,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:23,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1294682335, now seen corresponding path program 1 times [2023-08-26 20:20:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:23,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6699293] [2023-08-26 20:20:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:23,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:23,344 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 20:20:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6699293] [2023-08-26 20:20:23,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6699293] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:23,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:23,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:20:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419382906] [2023-08-26 20:20:23,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:23,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:20:23,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:23,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:20:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:20:23,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 269 [2023-08-26 20:20:23,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 79 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 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 20:20:23,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:23,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 269 [2023-08-26 20:20:23,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:23,579 INFO L124 PetriNetUnfolderBase]: 2135/2897 cut-off events. [2023-08-26 20:20:23,579 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-26 20:20:23,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5892 conditions, 2897 events. 2135/2897 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 11406 event pairs, 621 based on Foata normal form. 1/2220 useless extension candidates. Maximal degree in co-relation 5888. Up to 1323 conditions per place. [2023-08-26 20:20:23,593 INFO L140 encePairwiseOnDemand]: 260/269 looper letters, 53 selfloop transitions, 10 changer transitions 13/76 dead transitions. [2023-08-26 20:20:23,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 76 transitions, 329 flow [2023-08-26 20:20:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:20:23,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:20:23,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 521 transitions. [2023-08-26 20:20:23,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48420074349442377 [2023-08-26 20:20:23,595 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 521 transitions. [2023-08-26 20:20:23,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 521 transitions. [2023-08-26 20:20:23,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:23,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 521 transitions. [2023-08-26 20:20:23,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.25) internal successors, (521), 4 states have internal predecessors, (521), 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 20:20:23,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 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 20:20:23,599 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 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 20:20:23,599 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 79 flow. Second operand 4 states and 521 transitions. [2023-08-26 20:20:23,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 76 transitions, 329 flow [2023-08-26 20:20:23,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 76 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:20:23,601 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 156 flow [2023-08-26 20:20:23,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2023-08-26 20:20:23,602 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -9 predicate places. [2023-08-26 20:20:23,602 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 156 flow [2023-08-26 20:20:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 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 20:20:23,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:20:23,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:23,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:20:23,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-08-26 20:20:23,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:20:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1273207515, now seen corresponding path program 2 times [2023-08-26 20:20:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:20:23,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256730550] [2023-08-26 20:20:23,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:20:23,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:20:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:20:23,807 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 20:20:23,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:20:23,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256730550] [2023-08-26 20:20:23,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256730550] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:20:23,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:20:23,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:20:23,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132472188] [2023-08-26 20:20:23,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:20:23,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:20:23,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:20:23,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:20:23,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:20:23,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 269 [2023-08-26 20:20:23,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 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 20:20:23,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:20:23,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 269 [2023-08-26 20:20:23,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:20:24,080 INFO L124 PetriNetUnfolderBase]: 2485/3419 cut-off events. [2023-08-26 20:20:24,080 INFO L125 PetriNetUnfolderBase]: For 1950/1950 co-relation queries the response was YES. [2023-08-26 20:20:24,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9081 conditions, 3419 events. 2485/3419 cut-off events. For 1950/1950 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14126 event pairs, 768 based on Foata normal form. 1/3420 useless extension candidates. Maximal degree in co-relation 9075. Up to 1916 conditions per place. [2023-08-26 20:20:24,089 INFO L140 encePairwiseOnDemand]: 260/269 looper letters, 0 selfloop transitions, 0 changer transitions 93/93 dead transitions. [2023-08-26 20:20:24,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 93 transitions, 520 flow [2023-08-26 20:20:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:20:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:20:24,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 520 transitions. [2023-08-26 20:20:24,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.483271375464684 [2023-08-26 20:20:24,092 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 520 transitions. [2023-08-26 20:20:24,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 520 transitions. [2023-08-26 20:20:24,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:20:24,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 520 transitions. [2023-08-26 20:20:24,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 130.0) internal successors, (520), 4 states have internal predecessors, (520), 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 20:20:24,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 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 20:20:24,096 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 269.0) internal successors, (1345), 5 states have internal predecessors, (1345), 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 20:20:24,096 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 156 flow. Second operand 4 states and 520 transitions. [2023-08-26 20:20:24,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 93 transitions, 520 flow [2023-08-26 20:20:24,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 93 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:20:24,099 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2023-08-26 20:20:24,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=269, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2023-08-26 20:20:24,100 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -7 predicate places. [2023-08-26 20:20:24,100 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2023-08-26 20:20:24,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.25) internal successors, (465), 4 states have internal predecessors, (465), 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 20:20:24,106 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2023-08-26 20:20:24,106 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2023-08-26 20:20:24,106 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2023-08-26 20:20:24,106 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2023-08-26 20:20:24,107 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONASSERT (4 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 21 remaining) [2023-08-26 20:20:24,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 21 remaining) [2023-08-26 20:20:24,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:20:24,109 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:20:24,112 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:20:24,112 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:20:24,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:20:24 BasicIcfg [2023-08-26 20:20:24,116 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:20:24,117 INFO L158 Benchmark]: Toolchain (without parser) took 8425.27ms. Allocated memory was 354.4MB in the beginning and 511.7MB in the end (delta: 157.3MB). Free memory was 330.5MB in the beginning and 200.9MB in the end (delta: 129.6MB). Peak memory consumption was 289.4MB. Max. memory is 16.0GB. [2023-08-26 20:20:24,117 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 354.4MB. Free memory is still 330.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:20:24,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.00ms. Allocated memory is still 354.4MB. Free memory was 330.5MB in the beginning and 319.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 20:20:24,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.19ms. Allocated memory is still 354.4MB. Free memory was 319.1MB in the beginning and 317.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:20:24,117 INFO L158 Benchmark]: Boogie Preprocessor took 31.89ms. Allocated memory is still 354.4MB. Free memory was 317.3MB in the beginning and 316.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:20:24,118 INFO L158 Benchmark]: RCFGBuilder took 532.36ms. Allocated memory is still 354.4MB. Free memory was 315.6MB in the beginning and 298.5MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 20:20:24,118 INFO L158 Benchmark]: TraceAbstraction took 7625.91ms. Allocated memory was 354.4MB in the beginning and 511.7MB in the end (delta: 157.3MB). Free memory was 297.8MB in the beginning and 200.9MB in the end (delta: 96.8MB). Peak memory consumption was 255.8MB. Max. memory is 16.0GB. [2023-08-26 20:20:24,119 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 354.4MB. Free memory is still 330.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 198.00ms. Allocated memory is still 354.4MB. Free memory was 330.5MB in the beginning and 319.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.19ms. Allocated memory is still 354.4MB. Free memory was 319.1MB in the beginning and 317.3MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 31.89ms. Allocated memory is still 354.4MB. Free memory was 317.3MB in the beginning and 316.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 532.36ms. Allocated memory is still 354.4MB. Free memory was 315.6MB in the beginning and 298.5MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 7625.91ms. Allocated memory was 354.4MB in the beginning and 511.7MB in the end (delta: 157.3MB). Free memory was 297.8MB in the beginning and 200.9MB in the end (delta: 96.8MB). Peak memory consumption was 255.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 131 PlacesBefore, 56 PlacesAfterwards, 127 TransitionsBefore, 47 TransitionsAfterwards, 3846 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 65 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 14 ConcurrentYvCompositions, 5 ChoiceCompositions, 125 TotalNumberOfCompositions, 6483 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4489, independent: 4391, independent conditional: 0, independent unconditional: 4391, dependent: 98, dependent conditional: 0, dependent unconditional: 98, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2107, independent: 2067, independent conditional: 0, independent unconditional: 2067, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4489, independent: 2324, independent conditional: 0, independent unconditional: 2324, dependent: 58, dependent conditional: 0, dependent unconditional: 58, unknown: 2107, unknown conditional: 0, unknown unconditional: 2107] , Statistics on independence cache: Total cache size (in pairs): 188, Positive cache size: 176, Positive conditional cache size: 0, Positive unconditional cache size: 176, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, 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: -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: -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: -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: -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: -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: -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: -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: 21]: 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 9 procedures, 182 locations, 21 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: 7.5s, OverallIterations: 11, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 266 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 266 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 570 IncrementalHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 18 mSDtfsCounter, 570 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=156occurred in iteration=10, InterpolantAutomatonStates: 34, 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, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 91 NumberOfCodeBlocks, 91 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 480 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 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 17 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 20:20:24,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...