/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/parallel-ticket-8.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:03:54,948 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:03:55,031 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 20:03:55,036 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:03:55,037 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:03:55,066 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:03:55,066 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:03:55,067 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:03:55,067 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:03:55,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:03:55,071 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:03:55,071 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:03:55,071 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:03:55,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:03:55,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:03:55,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:03:55,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:03:55,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:03:55,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:03:55,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:03:55,074 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:03:55,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:03:55,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:03:55,076 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:03:55,076 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:03:55,076 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:03:55,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:03:55,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:03:55,077 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:03:55,077 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:03:55,078 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:03:55,078 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:03:55,078 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:03:55,079 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:03:55,079 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:03:55,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:03:55,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:03:55,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:03:55,392 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:03:55,393 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:03:55,393 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:03:55,395 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-ticket-8.wvr.c [2023-08-26 20:03:56,506 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:03:56,747 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:03:56,748 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-ticket-8.wvr.c [2023-08-26 20:03:56,754 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e52c5f9/83ad118a5dd542658d826397519cdccc/FLAG65a961c53 [2023-08-26 20:03:56,770 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6e52c5f9/83ad118a5dd542658d826397519cdccc [2023-08-26 20:03:56,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:03:56,775 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:03:56,778 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:03:56,778 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:03:56,781 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:03:56,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:03:56" (1/1) ... [2023-08-26 20:03:56,782 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9e75590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:56, skipping insertion in model container [2023-08-26 20:03:56,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:03:56" (1/1) ... [2023-08-26 20:03:56,817 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:03:57,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:03:57,022 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:03:57,068 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:03:57,081 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:03:57,082 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 20:03:57,088 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:03:57,088 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57 WrapperNode [2023-08-26 20:03:57,089 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:03:57,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:03:57,090 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:03:57,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:03:57,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,114 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,141 INFO L138 Inliner]: procedures = 27, calls = 131, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 372 [2023-08-26 20:03:57,142 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:03:57,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:03:57,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:03:57,143 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:03:57,150 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,150 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,162 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,164 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:03:57,169 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:03:57,169 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:03:57,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:03:57,170 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (1/1) ... [2023-08-26 20:03:57,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:03:57,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:03:57,215 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 20:03:57,221 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 20:03:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:03:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:03:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:03:57,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:03:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:03:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:03:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:03:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:03:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 20:03:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 20:03:57,243 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-26 20:03:57,243 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-26 20:03:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:03:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-26 20:03:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-26 20:03:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-08-26 20:03:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-08-26 20:03:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread7 [2023-08-26 20:03:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread7 [2023-08-26 20:03:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure thread8 [2023-08-26 20:03:57,244 INFO L138 BoogieDeclarations]: Found implementation of procedure thread8 [2023-08-26 20:03:57,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 20:03:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 20:03:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:03:57,245 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:03:57,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:03:57,246 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 20:03:57,343 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:03:57,344 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:03:57,816 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:03:57,938 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:03:57,938 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 20:03:57,940 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:03:57 BoogieIcfgContainer [2023-08-26 20:03:57,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:03:57,942 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:03:57,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:03:57,945 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:03:57,945 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:03:56" (1/3) ... [2023-08-26 20:03:57,945 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d0f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:03:57, skipping insertion in model container [2023-08-26 20:03:57,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:03:57" (2/3) ... [2023-08-26 20:03:57,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9d0f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:03:57, skipping insertion in model container [2023-08-26 20:03:57,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:03:57" (3/3) ... [2023-08-26 20:03:57,947 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-ticket-8.wvr.c [2023-08-26 20:03:57,960 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:03:57,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2023-08-26 20:03:57,961 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:03:58,070 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-26 20:03:58,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 272 transitions, 608 flow [2023-08-26 20:03:58,250 INFO L124 PetriNetUnfolderBase]: 2/264 cut-off events. [2023-08-26 20:03:58,251 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 20:03:58,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297 conditions, 264 events. 2/264 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 218 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-26 20:03:58,256 INFO L82 GeneralOperation]: Start removeDead. Operand has 295 places, 272 transitions, 608 flow [2023-08-26 20:03:58,263 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 243 transitions, 534 flow [2023-08-26 20:03:58,266 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:03:58,279 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 243 transitions, 534 flow [2023-08-26 20:03:58,282 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 243 transitions, 534 flow [2023-08-26 20:03:58,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 243 transitions, 534 flow [2023-08-26 20:03:58,337 INFO L124 PetriNetUnfolderBase]: 2/243 cut-off events. [2023-08-26 20:03:58,338 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-26 20:03:58,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 243 events. 2/243 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 216 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 200. Up to 2 conditions per place. [2023-08-26 20:03:58,342 INFO L119 LiptonReduction]: Number of co-enabled transitions 7070 [2023-08-26 20:04:12,631 INFO L134 LiptonReduction]: Checked pairs total: 40663 [2023-08-26 20:04:12,631 INFO L136 LiptonReduction]: Total number of compositions: 206 [2023-08-26 20:04:12,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:04:12,648 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;@894a543, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:04:12,648 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-08-26 20:04:12,650 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:04:12,650 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 20:04:12,650 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:04:12,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:04:12,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:04:12,651 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-08-26 20:04:12,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:04:12,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1055, now seen corresponding path program 1 times [2023-08-26 20:04:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:04:12,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111983424] [2023-08-26 20:04:12,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:04:12,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:04:12,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:04:12,751 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 20:04:12,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:04:12,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111983424] [2023-08-26 20:04:12,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111983424] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:04:12,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:04:12,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:04:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169911716] [2023-08-26 20:04:12,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:04:12,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:04:12,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:04:12,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:04:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:04:12,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 478 [2023-08-26 20:04:12,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 98 transitions, 244 flow. Second operand has 2 states, 2 states have (on average 229.5) internal successors, (459), 2 states have internal predecessors, (459), 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 20:04:12,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:04:12,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 478 [2023-08-26 20:04:12,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand