/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:42:36,925 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:42:36,972 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 11:42:36,977 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:42:36,977 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:42:37,013 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:42:37,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:42:37,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:42:37,017 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:42:37,017 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:42:37,018 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:42:37,018 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:42:37,018 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:42:37,019 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:42:37,019 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:42:37,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:42:37,020 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:42:37,020 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:42:37,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:42:37,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:42:37,021 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:42:37,027 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:42:37,027 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:42:37,027 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:42:37,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:42:37,031 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:42:37,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:42:37,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:42:37,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:42:37,032 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:42:37,032 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:42:37,033 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:42:37,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:42:37,033 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:42:37,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:42:37,033 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:42:37,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:42:37,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:42:37,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:42:37,398 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:42:37,399 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:42:37,400 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-26 11:42:38,701 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:42:38,929 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:42:38,929 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-26 11:42:38,949 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc67bfe3e/2acadf1a317c48ff8e93288a60c82314/FLAGad8d98327 [2023-08-26 11:42:38,961 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc67bfe3e/2acadf1a317c48ff8e93288a60c82314 [2023-08-26 11:42:38,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:42:38,964 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:42:38,965 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:42:38,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:42:38,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:42:38,969 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:42:38" (1/1) ... [2023-08-26 11:42:38,969 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358bc75f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:38, skipping insertion in model container [2023-08-26 11:42:38,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:42:38" (1/1) ... [2023-08-26 11:42:39,000 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:42:39,187 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:42:39,347 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:42:39,360 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:42:39,382 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-26 11:42:39,393 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 11:42:39,394 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-26 11:42:39,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:42:39,448 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:42:39,449 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:42:39,449 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:42:39,455 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:42:39,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39 WrapperNode [2023-08-26 11:42:39,455 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:42:39,456 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:42:39,457 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:42:39,457 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:42:39,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,494 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,521 INFO L138 Inliner]: procedures = 174, calls = 52, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 122 [2023-08-26 11:42:39,522 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:42:39,522 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:42:39,523 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:42:39,523 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:42:39,532 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,532 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,545 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,546 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,550 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,551 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,553 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,554 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:42:39,573 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:42:39,573 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:42:39,574 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:42:39,574 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (1/1) ... [2023-08-26 11:42:39,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:42:39,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:42:39,670 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 11:42:39,684 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 11:42:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:42:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:42:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:42:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:42:39,703 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-08-26 11:42:39,704 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-08-26 11:42:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:42:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:42:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:42:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:42:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:42:39,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:42:39,704 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-08-26 11:42:39,705 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-08-26 11:42:39,706 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 11:42:39,810 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:42:39,811 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:42:40,047 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:42:40,073 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:42:40,073 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 11:42:40,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:42:40 BoogieIcfgContainer [2023-08-26 11:42:40,075 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:42:40,077 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:42:40,077 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:42:40,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:42:40,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:42:38" (1/3) ... [2023-08-26 11:42:40,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:42:40, skipping insertion in model container [2023-08-26 11:42:40,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:42:39" (2/3) ... [2023-08-26 11:42:40,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55e300 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:42:40, skipping insertion in model container [2023-08-26 11:42:40,081 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:42:40" (3/3) ... [2023-08-26 11:42:40,082 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-08-26 11:42:40,099 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:42:40,099 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-08-26 11:42:40,101 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:42:40,218 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 11:42:40,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 136 transitions, 304 flow [2023-08-26 11:42:40,292 INFO L124 PetriNetUnfolderBase]: 4/132 cut-off events. [2023-08-26 11:42:40,292 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-26 11:42:40,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 132 events. 4/132 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 209 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-26 11:42:40,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 136 transitions, 304 flow [2023-08-26 11:42:40,302 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 119 transitions, 259 flow [2023-08-26 11:42:40,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:42:40,313 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 119 transitions, 259 flow [2023-08-26 11:42:40,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 119 transitions, 259 flow [2023-08-26 11:42:40,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 119 transitions, 259 flow [2023-08-26 11:42:40,344 INFO L124 PetriNetUnfolderBase]: 4/119 cut-off events. [2023-08-26 11:42:40,344 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 11:42:40,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 119 events. 4/119 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 207 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2023-08-26 11:42:40,348 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2023-08-26 11:42:43,851 INFO L134 LiptonReduction]: Checked pairs total: 15393 [2023-08-26 11:42:43,852 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-26 11:42:43,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:42:43,866 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;@24935bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:42:43,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2023-08-26 11:42:43,868 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:42:43,868 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 11:42:43,869 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:42:43,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:43,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:42:43,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:43,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 463, now seen corresponding path program 1 times [2023-08-26 11:42:43,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:43,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106389298] [2023-08-26 11:42:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:43,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:43,959 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 11:42:43,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:43,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106389298] [2023-08-26 11:42:43,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106389298] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:43,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:43,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:42:43,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474187231] [2023-08-26 11:42:43,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:43,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:42:43,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:43,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:42:43,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:42:43,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 245 [2023-08-26 11:42:43,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 139 flow. Second operand has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 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 11:42:43,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:43,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 245 [2023-08-26 11:42:43,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:44,944 INFO L124 PetriNetUnfolderBase]: 6119/9482 cut-off events. [2023-08-26 11:42:44,944 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2023-08-26 11:42:44,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18342 conditions, 9482 events. 6119/9482 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 68413 event pairs, 6119 based on Foata normal form. 992/7652 useless extension candidates. Maximal degree in co-relation 14264. Up to 8549 conditions per place. [2023-08-26 11:42:45,010 INFO L140 encePairwiseOnDemand]: 240/245 looper letters, 44 selfloop transitions, 0 changer transitions 0/54 dead transitions. [2023-08-26 11:42:45,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 54 transitions, 217 flow [2023-08-26 11:42:45,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:42:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:42:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 289 transitions. [2023-08-26 11:42:45,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5897959183673469 [2023-08-26 11:42:45,027 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 289 transitions. [2023-08-26 11:42:45,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 289 transitions. [2023-08-26 11:42:45,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:45,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 289 transitions. [2023-08-26 11:42:45,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 144.5) internal successors, (289), 2 states have internal predecessors, (289), 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 11:42:45,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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 11:42:45,041 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 245.0) internal successors, (735), 3 states have internal predecessors, (735), 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 11:42:45,042 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 139 flow. Second operand 2 states and 289 transitions. [2023-08-26 11:42:45,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 54 transitions, 217 flow [2023-08-26 11:42:45,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 204 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 11:42:45,053 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 116 flow [2023-08-26 11:42:45,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=116, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2023-08-26 11:42:45,057 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2023-08-26 11:42:45,057 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 116 flow [2023-08-26 11:42:45,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 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 11:42:45,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:45,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:42:45,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:42:45,058 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:45,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:45,059 INFO L85 PathProgramCache]: Analyzing trace with hash 456061, now seen corresponding path program 1 times [2023-08-26 11:42:45,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:45,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596874598] [2023-08-26 11:42:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:45,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:45,297 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 11:42:45,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:45,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596874598] [2023-08-26 11:42:45,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596874598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:45,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:45,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:45,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635090413] [2023-08-26 11:42:45,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:45,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:45,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:45,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 245 [2023-08-26 11:42:45,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 11:42:45,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:45,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 245 [2023-08-26 11:42:45,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:46,024 INFO L124 PetriNetUnfolderBase]: 5820/9053 cut-off events. [2023-08-26 11:42:46,025 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:46,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17306 conditions, 9053 events. 5820/9053 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 65247 event pairs, 5820 based on Foata normal form. 0/6474 useless extension candidates. Maximal degree in co-relation 17303. Up to 8120 conditions per place. [2023-08-26 11:42:46,079 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 41 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-26 11:42:46,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 196 flow [2023-08-26 11:42:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:46,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:46,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2023-08-26 11:42:46,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231292517006803 [2023-08-26 11:42:46,082 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2023-08-26 11:42:46,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2023-08-26 11:42:46,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:46,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2023-08-26 11:42:46,083 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 11:42:46,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:46,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:46,086 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 116 flow. Second operand 3 states and 311 transitions. [2023-08-26 11:42:46,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 196 flow [2023-08-26 11:42:46,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:46,087 INFO L231 Difference]: Finished difference. Result has 61 places, 52 transitions, 114 flow [2023-08-26 11:42:46,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=61, PETRI_TRANSITIONS=52} [2023-08-26 11:42:46,088 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -8 predicate places. [2023-08-26 11:42:46,088 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 52 transitions, 114 flow [2023-08-26 11:42:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 11:42:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:42:46,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:42:46,089 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:46,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash 456059, now seen corresponding path program 1 times [2023-08-26 11:42:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717745679] [2023-08-26 11:42:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:46,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:46,293 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 11:42:46,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:46,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717745679] [2023-08-26 11:42:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717745679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:46,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736038731] [2023-08-26 11:42:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:46,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:46,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:46,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:46,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 245 [2023-08-26 11:42:46,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 52 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 11:42:46,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:46,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 245 [2023-08-26 11:42:46,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:46,907 INFO L124 PetriNetUnfolderBase]: 5521/8624 cut-off events. [2023-08-26 11:42:46,908 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:46,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16451 conditions, 8624 events. 5521/8624 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 61950 event pairs, 5521 based on Foata normal form. 0/6288 useless extension candidates. Maximal degree in co-relation 16447. Up to 7692 conditions per place. [2023-08-26 11:42:46,957 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 39 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-26 11:42:46,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 190 flow [2023-08-26 11:42:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-26 11:42:46,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43673469387755104 [2023-08-26 11:42:46,959 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-26 11:42:46,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-26 11:42:46,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:46,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-26 11:42:46,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 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 11:42:46,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:46,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:46,964 INFO L175 Difference]: Start difference. First operand has 61 places, 52 transitions, 114 flow. Second operand 3 states and 321 transitions. [2023-08-26 11:42:46,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 190 flow [2023-08-26 11:42:46,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 50 transitions, 189 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:46,966 INFO L231 Difference]: Finished difference. Result has 60 places, 50 transitions, 111 flow [2023-08-26 11:42:46,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=60, PETRI_TRANSITIONS=50} [2023-08-26 11:42:46,968 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2023-08-26 11:42:46,968 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 50 transitions, 111 flow [2023-08-26 11:42:46,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 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 11:42:46,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:46,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:42:46,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:42:46,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:46,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:46,972 INFO L85 PathProgramCache]: Analyzing trace with hash 438283933, now seen corresponding path program 1 times [2023-08-26 11:42:46,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:46,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395400106] [2023-08-26 11:42:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:46,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:47,158 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 11:42:47,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:47,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395400106] [2023-08-26 11:42:47,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395400106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:47,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:47,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:47,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341068035] [2023-08-26 11:42:47,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:47,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:47,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:47,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 245 [2023-08-26 11:42:47,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 50 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 11:42:47,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:47,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 245 [2023-08-26 11:42:47,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:47,800 INFO L124 PetriNetUnfolderBase]: 5462/8514 cut-off events. [2023-08-26 11:42:47,800 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:47,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16244 conditions, 8514 events. 5462/8514 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 60993 event pairs, 5462 based on Foata normal form. 0/6229 useless extension candidates. Maximal degree in co-relation 16240. Up to 7594 conditions per place. [2023-08-26 11:42:47,872 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 37 selfloop transitions, 1 changer transitions 0/48 dead transitions. [2023-08-26 11:42:47,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 48 transitions, 183 flow [2023-08-26 11:42:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-26 11:42:47,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340136054421769 [2023-08-26 11:42:47,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-26 11:42:47,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-26 11:42:47,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:47,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-26 11:42:47,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 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 11:42:47,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:47,878 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:47,878 INFO L175 Difference]: Start difference. First operand has 60 places, 50 transitions, 111 flow. Second operand 3 states and 319 transitions. [2023-08-26 11:42:47,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 48 transitions, 183 flow [2023-08-26 11:42:47,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 48 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:47,880 INFO L231 Difference]: Finished difference. Result has 59 places, 48 transitions, 108 flow [2023-08-26 11:42:47,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=59, PETRI_TRANSITIONS=48} [2023-08-26 11:42:47,881 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -10 predicate places. [2023-08-26 11:42:47,881 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 48 transitions, 108 flow [2023-08-26 11:42:47,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 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 11:42:47,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:47,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:42:47,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:42:47,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:47,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:47,882 INFO L85 PathProgramCache]: Analyzing trace with hash 438283934, now seen corresponding path program 1 times [2023-08-26 11:42:47,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:47,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518104672] [2023-08-26 11:42:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:47,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:47,937 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 11:42:47,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:47,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518104672] [2023-08-26 11:42:47,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518104672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:47,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:47,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:47,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178190064] [2023-08-26 11:42:47,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:47,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:47,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:47,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:47,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 245 [2023-08-26 11:42:47,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 11:42:47,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:47,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 245 [2023-08-26 11:42:47,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:48,428 INFO L124 PetriNetUnfolderBase]: 5403/8404 cut-off events. [2023-08-26 11:42:48,429 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:48,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16037 conditions, 8404 events. 5403/8404 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 60102 event pairs, 5403 based on Foata normal form. 0/6170 useless extension candidates. Maximal degree in co-relation 16033. Up to 7496 conditions per place. [2023-08-26 11:42:48,505 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 35 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-26 11:42:48,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 46 transitions, 176 flow [2023-08-26 11:42:48,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 305 transitions. [2023-08-26 11:42:48,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2023-08-26 11:42:48,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 305 transitions. [2023-08-26 11:42:48,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 305 transitions. [2023-08-26 11:42:48,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:48,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 305 transitions. [2023-08-26 11:42:48,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 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 11:42:48,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:48,510 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:48,510 INFO L175 Difference]: Start difference. First operand has 59 places, 48 transitions, 108 flow. Second operand 3 states and 305 transitions. [2023-08-26 11:42:48,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 46 transitions, 176 flow [2023-08-26 11:42:48,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 46 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:48,513 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 105 flow [2023-08-26 11:42:48,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2023-08-26 11:42:48,515 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -11 predicate places. [2023-08-26 11:42:48,515 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 105 flow [2023-08-26 11:42:48,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 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 11:42:48,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:48,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:48,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:42:48,516 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:48,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:48,517 INFO L85 PathProgramCache]: Analyzing trace with hash 284073858, now seen corresponding path program 1 times [2023-08-26 11:42:48,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:48,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020995446] [2023-08-26 11:42:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:48,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:48,599 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 11:42:48,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020995446] [2023-08-26 11:42:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020995446] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:48,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:48,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:48,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524060294] [2023-08-26 11:42:48,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:48,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:48,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:48,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 245 [2023-08-26 11:42:48,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 11:42:48,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:48,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 245 [2023-08-26 11:42:48,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:49,114 INFO L124 PetriNetUnfolderBase]: 5280/8220 cut-off events. [2023-08-26 11:42:49,115 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:49,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15670 conditions, 8220 events. 5280/8220 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 58730 event pairs, 5280 based on Foata normal form. 0/6091 useless extension candidates. Maximal degree in co-relation 15666. Up to 7312 conditions per place. [2023-08-26 11:42:49,173 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 33 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-08-26 11:42:49,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 44 transitions, 169 flow [2023-08-26 11:42:49,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-08-26 11:42:49,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122448979591837 [2023-08-26 11:42:49,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-08-26 11:42:49,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-08-26 11:42:49,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:49,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-08-26 11:42:49,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 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 11:42:49,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:49,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:49,178 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 105 flow. Second operand 3 states and 303 transitions. [2023-08-26 11:42:49,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 44 transitions, 169 flow [2023-08-26 11:42:49,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 44 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:49,179 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 102 flow [2023-08-26 11:42:49,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2023-08-26 11:42:49,180 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -12 predicate places. [2023-08-26 11:42:49,180 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 102 flow [2023-08-26 11:42:49,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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 11:42:49,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:49,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:49,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:42:49,181 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:49,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:49,181 INFO L85 PathProgramCache]: Analyzing trace with hash 284073859, now seen corresponding path program 1 times [2023-08-26 11:42:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439438725] [2023-08-26 11:42:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:49,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:49,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:49,230 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 11:42:49,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:49,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439438725] [2023-08-26 11:42:49,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439438725] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:49,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:49,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:49,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043635575] [2023-08-26 11:42:49,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:49,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:49,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:49,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 245 [2023-08-26 11:42:49,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 11:42:49,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:49,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 245 [2023-08-26 11:42:49,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:49,676 INFO L124 PetriNetUnfolderBase]: 5157/8036 cut-off events. [2023-08-26 11:42:49,676 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:49,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15303 conditions, 8036 events. 5157/8036 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 57340 event pairs, 5157 based on Foata normal form. 0/6012 useless extension candidates. Maximal degree in co-relation 15299. Up to 7128 conditions per place. [2023-08-26 11:42:49,738 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 31 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2023-08-26 11:42:49,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 42 transitions, 162 flow [2023-08-26 11:42:49,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:49,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:49,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-26 11:42:49,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42585034013605444 [2023-08-26 11:42:49,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-26 11:42:49,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-26 11:42:49,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:49,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-26 11:42:49,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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 11:42:49,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:49,743 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:49,744 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 102 flow. Second operand 3 states and 313 transitions. [2023-08-26 11:42:49,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 42 transitions, 162 flow [2023-08-26 11:42:49,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 42 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:49,747 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 99 flow [2023-08-26 11:42:49,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2023-08-26 11:42:49,749 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -13 predicate places. [2023-08-26 11:42:49,749 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 99 flow [2023-08-26 11:42:49,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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 11:42:49,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:49,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:49,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:42:49,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:49,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:49,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1882917184, now seen corresponding path program 1 times [2023-08-26 11:42:49,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:49,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195094769] [2023-08-26 11:42:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:49,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:49,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:49,795 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 11:42:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:49,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195094769] [2023-08-26 11:42:49,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195094769] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:49,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:49,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:42:49,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089681135] [2023-08-26 11:42:49,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:49,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:49,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:49,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:49,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:49,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 245 [2023-08-26 11:42:49,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 11:42:49,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:49,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 245 [2023-08-26 11:42:49,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:50,137 INFO L124 PetriNetUnfolderBase]: 4014/6299 cut-off events. [2023-08-26 11:42:50,138 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:50,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12046 conditions, 6299 events. 4014/6299 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 43661 event pairs, 4014 based on Foata normal form. 0/4887 useless extension candidates. Maximal degree in co-relation 12042. Up to 5607 conditions per place. [2023-08-26 11:42:50,174 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 30 selfloop transitions, 1 changer transitions 0/41 dead transitions. [2023-08-26 11:42:50,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 41 transitions, 159 flow [2023-08-26 11:42:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 311 transitions. [2023-08-26 11:42:50,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231292517006803 [2023-08-26 11:42:50,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 311 transitions. [2023-08-26 11:42:50,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 311 transitions. [2023-08-26 11:42:50,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:50,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 311 transitions. [2023-08-26 11:42:50,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.66666666666667) internal successors, (311), 3 states have internal predecessors, (311), 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 11:42:50,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:50,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:50,178 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 99 flow. Second operand 3 states and 311 transitions. [2023-08-26 11:42:50,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 41 transitions, 159 flow [2023-08-26 11:42:50,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:50,180 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 98 flow [2023-08-26 11:42:50,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=54, 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=98, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-26 11:42:50,180 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -13 predicate places. [2023-08-26 11:42:50,180 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 98 flow [2023-08-26 11:42:50,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 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 11:42:50,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:50,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:50,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:42:50,181 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:50,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:50,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1882917185, now seen corresponding path program 1 times [2023-08-26 11:42:50,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:50,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058077694] [2023-08-26 11:42:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:50,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:50,299 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 11:42:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:50,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058077694] [2023-08-26 11:42:50,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058077694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:50,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:50,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410433819] [2023-08-26 11:42:50,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:50,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:42:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:50,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:42:50,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:42:50,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 245 [2023-08-26 11:42:50,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 81.5) internal successors, (489), 6 states have internal predecessors, (489), 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 11:42:50,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:50,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 245 [2023-08-26 11:42:50,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:50,544 INFO L124 PetriNetUnfolderBase]: 2871/4562 cut-off events. [2023-08-26 11:42:50,544 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-08-26 11:42:50,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8789 conditions, 4562 events. 2871/4562 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30771 event pairs, 2871 based on Foata normal form. 0/3762 useless extension candidates. Maximal degree in co-relation 8785. Up to 4086 conditions per place. [2023-08-26 11:42:50,564 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 29 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 11:42:50,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 40 transitions, 156 flow [2023-08-26 11:42:50,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 271 transitions. [2023-08-26 11:42:50,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3687074829931973 [2023-08-26 11:42:50,566 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 271 transitions. [2023-08-26 11:42:50,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 271 transitions. [2023-08-26 11:42:50,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:50,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 271 transitions. [2023-08-26 11:42:50,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 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 11:42:50,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:50,569 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:50,569 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 98 flow. Second operand 3 states and 271 transitions. [2023-08-26 11:42:50,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 40 transitions, 156 flow [2023-08-26 11:42:50,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 40 transitions, 155 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:50,570 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 97 flow [2023-08-26 11:42:50,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-26 11:42:50,571 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -13 predicate places. [2023-08-26 11:42:50,571 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 97 flow [2023-08-26 11:42:50,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.5) internal successors, (489), 6 states have internal predecessors, (489), 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 11:42:50,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:50,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:50,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:42:50,572 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:50,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:50,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1914169580, now seen corresponding path program 1 times [2023-08-26 11:42:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320038353] [2023-08-26 11:42:50,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:50,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:50,613 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 11:42:50,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:50,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320038353] [2023-08-26 11:42:50,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320038353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:50,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:50,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:50,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984404381] [2023-08-26 11:42:50,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:50,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:42:50,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:42:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:42:50,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 245 [2023-08-26 11:42:50,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 97 flow. Second operand has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 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 11:42:50,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:50,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 245 [2023-08-26 11:42:50,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:52,605 INFO L124 PetriNetUnfolderBase]: 27093/37500 cut-off events. [2023-08-26 11:42:52,605 INFO L125 PetriNetUnfolderBase]: For 1048/1048 co-relation queries the response was YES. [2023-08-26 11:42:52,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75591 conditions, 37500 events. 27093/37500 cut-off events. For 1048/1048 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 218255 event pairs, 4805 based on Foata normal form. 0/33226 useless extension candidates. Maximal degree in co-relation 75587. Up to 16411 conditions per place. [2023-08-26 11:42:52,769 INFO L140 encePairwiseOnDemand]: 234/245 looper letters, 172 selfloop transitions, 27 changer transitions 10/209 dead transitions. [2023-08-26 11:42:52,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 209 transitions, 882 flow [2023-08-26 11:42:52,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:42:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:42:52,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1140 transitions. [2023-08-26 11:42:52,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2023-08-26 11:42:52,773 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1140 transitions. [2023-08-26 11:42:52,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1140 transitions. [2023-08-26 11:42:52,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:52,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1140 transitions. [2023-08-26 11:42:52,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 126.66666666666667) internal successors, (1140), 9 states have internal predecessors, (1140), 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 11:42:52,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 11:42:52,779 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 11:42:52,780 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 97 flow. Second operand 9 states and 1140 transitions. [2023-08-26 11:42:52,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 209 transitions, 882 flow [2023-08-26 11:42:52,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 209 transitions, 881 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:52,783 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 274 flow [2023-08-26 11:42:52,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=274, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2023-08-26 11:42:52,783 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -1 predicate places. [2023-08-26 11:42:52,783 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 274 flow [2023-08-26 11:42:52,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 104.8) internal successors, (524), 5 states have internal predecessors, (524), 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 11:42:52,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:52,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:52,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:42:52,784 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:52,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:52,785 INFO L85 PathProgramCache]: Analyzing trace with hash 514804599, now seen corresponding path program 1 times [2023-08-26 11:42:52,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:52,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726755176] [2023-08-26 11:42:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:52,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:52,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:52,829 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 11:42:52,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:52,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726755176] [2023-08-26 11:42:52,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726755176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:52,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:52,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:42:52,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620205153] [2023-08-26 11:42:52,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:52,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:42:52,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:52,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:42:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:42:52,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 245 [2023-08-26 11:42:52,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 11:42:52,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:52,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 245 [2023-08-26 11:42:52,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:53,785 INFO L124 PetriNetUnfolderBase]: 9288/14700 cut-off events. [2023-08-26 11:42:53,785 INFO L125 PetriNetUnfolderBase]: For 6343/6794 co-relation queries the response was YES. [2023-08-26 11:42:53,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35103 conditions, 14700 events. 9288/14700 cut-off events. For 6343/6794 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 112604 event pairs, 2471 based on Foata normal form. 1358/13727 useless extension candidates. Maximal degree in co-relation 35095. Up to 6275 conditions per place. [2023-08-26 11:42:53,867 INFO L140 encePairwiseOnDemand]: 239/245 looper letters, 50 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2023-08-26 11:42:53,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 89 transitions, 451 flow [2023-08-26 11:42:53,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:42:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:42:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-26 11:42:53,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2023-08-26 11:42:53,875 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-26 11:42:53,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-26 11:42:53,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:53,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-26 11:42:53,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 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 11:42:53,882 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:53,883 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 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 11:42:53,883 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 274 flow. Second operand 3 states and 405 transitions. [2023-08-26 11:42:53,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 89 transitions, 451 flow [2023-08-26 11:42:53,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 451 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:53,936 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 290 flow [2023-08-26 11:42:53,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2023-08-26 11:42:53,937 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2023-08-26 11:42:53,937 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 290 flow [2023-08-26 11:42:53,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 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 11:42:53,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:53,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:53,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:42:53,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:53,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:53,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1533638903, now seen corresponding path program 2 times [2023-08-26 11:42:53,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:53,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129139902] [2023-08-26 11:42:53,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:53,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:53,997 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 11:42:53,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:53,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129139902] [2023-08-26 11:42:53,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129139902] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:53,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:53,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:42:53,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179231795] [2023-08-26 11:42:53,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:53,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:42:53,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:53,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:42:53,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:42:53,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 245 [2023-08-26 11:42:53,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 290 flow. Second operand has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 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 11:42:53,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:53,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 245 [2023-08-26 11:42:54,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:54,371 INFO L124 PetriNetUnfolderBase]: 2739/5297 cut-off events. [2023-08-26 11:42:54,371 INFO L125 PetriNetUnfolderBase]: For 5515/5679 co-relation queries the response was YES. [2023-08-26 11:42:54,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13594 conditions, 5297 events. 2739/5297 cut-off events. For 5515/5679 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 42235 event pairs, 796 based on Foata normal form. 723/5244 useless extension candidates. Maximal degree in co-relation 13584. Up to 1744 conditions per place. [2023-08-26 11:42:54,403 INFO L140 encePairwiseOnDemand]: 238/245 looper letters, 63 selfloop transitions, 7 changer transitions 19/120 dead transitions. [2023-08-26 11:42:54,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 648 flow [2023-08-26 11:42:54,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:42:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:42:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 543 transitions. [2023-08-26 11:42:54,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5540816326530612 [2023-08-26 11:42:54,405 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 543 transitions. [2023-08-26 11:42:54,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 543 transitions. [2023-08-26 11:42:54,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:54,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 543 transitions. [2023-08-26 11:42:54,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 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 11:42:54,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 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 11:42:54,409 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 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 11:42:54,409 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 290 flow. Second operand 4 states and 543 transitions. [2023-08-26 11:42:54,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 648 flow [2023-08-26 11:42:54,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 120 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:42:54,424 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 321 flow [2023-08-26 11:42:54,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=321, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2023-08-26 11:42:54,425 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 6 predicate places. [2023-08-26 11:42:54,425 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 321 flow [2023-08-26 11:42:54,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 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 11:42:54,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:54,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:54,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:42:54,426 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:54,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:54,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1532557485, now seen corresponding path program 1 times [2023-08-26 11:42:54,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:54,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492223926] [2023-08-26 11:42:54,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:54,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:54,471 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 11:42:54,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:54,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492223926] [2023-08-26 11:42:54,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492223926] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:54,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:54,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:54,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250435188] [2023-08-26 11:42:54,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:54,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:42:54,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:54,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:42:54,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:42:54,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 245 [2023-08-26 11:42:54,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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 11:42:54,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:54,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 245 [2023-08-26 11:42:54,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:55,133 INFO L124 PetriNetUnfolderBase]: 4287/7565 cut-off events. [2023-08-26 11:42:55,133 INFO L125 PetriNetUnfolderBase]: For 8116/8118 co-relation queries the response was YES. [2023-08-26 11:42:55,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21711 conditions, 7565 events. 4287/7565 cut-off events. For 8116/8118 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 51895 event pairs, 917 based on Foata normal form. 0/7163 useless extension candidates. Maximal degree in co-relation 21699. Up to 3066 conditions per place. [2023-08-26 11:42:55,160 INFO L140 encePairwiseOnDemand]: 234/245 looper letters, 152 selfloop transitions, 43 changer transitions 35/232 dead transitions. [2023-08-26 11:42:55,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 232 transitions, 1506 flow [2023-08-26 11:42:55,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:42:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:42:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1113 transitions. [2023-08-26 11:42:55,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2023-08-26 11:42:55,163 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1113 transitions. [2023-08-26 11:42:55,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1113 transitions. [2023-08-26 11:42:55,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:55,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1113 transitions. [2023-08-26 11:42:55,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 123.66666666666667) internal successors, (1113), 9 states have internal predecessors, (1113), 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 11:42:55,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 11:42:55,170 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 11:42:55,170 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 321 flow. Second operand 9 states and 1113 transitions. [2023-08-26 11:42:55,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 232 transitions, 1506 flow [2023-08-26 11:42:55,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 232 transitions, 1490 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:55,190 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 628 flow [2023-08-26 11:42:55,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=628, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2023-08-26 11:42:55,191 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 20 predicate places. [2023-08-26 11:42:55,191 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 628 flow [2023-08-26 11:42:55,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 105.6) internal successors, (528), 5 states have internal predecessors, (528), 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 11:42:55,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:55,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:55,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:42:55,192 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:55,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:55,192 INFO L85 PathProgramCache]: Analyzing trace with hash 66373017, now seen corresponding path program 1 times [2023-08-26 11:42:55,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:55,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568843213] [2023-08-26 11:42:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:55,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:55,236 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 11:42:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:55,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568843213] [2023-08-26 11:42:55,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568843213] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:55,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:55,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410135322] [2023-08-26 11:42:55,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:55,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:42:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:55,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:42:55,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:42:55,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 245 [2023-08-26 11:42:55,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 628 flow. Second operand has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 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 11:42:55,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:55,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 245 [2023-08-26 11:42:55,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:55,831 INFO L124 PetriNetUnfolderBase]: 3618/6589 cut-off events. [2023-08-26 11:42:55,831 INFO L125 PetriNetUnfolderBase]: For 9593/9593 co-relation queries the response was YES. [2023-08-26 11:42:55,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21668 conditions, 6589 events. 3618/6589 cut-off events. For 9593/9593 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 45502 event pairs, 534 based on Foata normal form. 70/6659 useless extension candidates. Maximal degree in co-relation 21649. Up to 2376 conditions per place. [2023-08-26 11:42:55,863 INFO L140 encePairwiseOnDemand]: 235/245 looper letters, 141 selfloop transitions, 51 changer transitions 34/228 dead transitions. [2023-08-26 11:42:55,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 228 transitions, 1645 flow [2023-08-26 11:42:55,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:42:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:42:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1103 transitions. [2023-08-26 11:42:55,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5002267573696145 [2023-08-26 11:42:55,867 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1103 transitions. [2023-08-26 11:42:55,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1103 transitions. [2023-08-26 11:42:55,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:55,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1103 transitions. [2023-08-26 11:42:55,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 122.55555555555556) internal successors, (1103), 9 states have internal predecessors, (1103), 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 11:42:55,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 11:42:55,874 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 245.0) internal successors, (2450), 10 states have internal predecessors, (2450), 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 11:42:55,874 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 628 flow. Second operand 9 states and 1103 transitions. [2023-08-26 11:42:55,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 228 transitions, 1645 flow [2023-08-26 11:42:55,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 228 transitions, 1643 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:55,918 INFO L231 Difference]: Finished difference. Result has 97 places, 107 transitions, 825 flow [2023-08-26 11:42:55,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=825, PETRI_PLACES=97, PETRI_TRANSITIONS=107} [2023-08-26 11:42:55,919 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 28 predicate places. [2023-08-26 11:42:55,919 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 107 transitions, 825 flow [2023-08-26 11:42:55,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 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 11:42:55,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:55,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:55,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:42:55,920 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:55,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash 83931100, now seen corresponding path program 1 times [2023-08-26 11:42:55,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:55,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075409734] [2023-08-26 11:42:55,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:55,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:55,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:56,013 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 11:42:56,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:56,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075409734] [2023-08-26 11:42:56,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075409734] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:56,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:56,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:42:56,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367548336] [2023-08-26 11:42:56,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:56,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:42:56,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:56,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:42:56,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:42:56,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 245 [2023-08-26 11:42:56,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 107 transitions, 825 flow. Second operand has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 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 11:42:56,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:56,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 245 [2023-08-26 11:42:56,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:56,690 INFO L124 PetriNetUnfolderBase]: 3731/6652 cut-off events. [2023-08-26 11:42:56,691 INFO L125 PetriNetUnfolderBase]: For 13391/13391 co-relation queries the response was YES. [2023-08-26 11:42:56,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23429 conditions, 6652 events. 3731/6652 cut-off events. For 13391/13391 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 45009 event pairs, 852 based on Foata normal form. 78/6730 useless extension candidates. Maximal degree in co-relation 23406. Up to 2990 conditions per place. [2023-08-26 11:42:56,724 INFO L140 encePairwiseOnDemand]: 236/245 looper letters, 141 selfloop transitions, 49 changer transitions 15/205 dead transitions. [2023-08-26 11:42:56,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 205 transitions, 1707 flow [2023-08-26 11:42:56,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:42:56,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:42:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 861 transitions. [2023-08-26 11:42:56,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020408163265306 [2023-08-26 11:42:56,727 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 861 transitions. [2023-08-26 11:42:56,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 861 transitions. [2023-08-26 11:42:56,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:56,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 861 transitions. [2023-08-26 11:42:56,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.0) internal successors, (861), 7 states have internal predecessors, (861), 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 11:42:56,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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 11:42:56,733 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 245.0) internal successors, (1960), 8 states have internal predecessors, (1960), 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 11:42:56,733 INFO L175 Difference]: Start difference. First operand has 97 places, 107 transitions, 825 flow. Second operand 7 states and 861 transitions. [2023-08-26 11:42:56,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 205 transitions, 1707 flow [2023-08-26 11:42:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 205 transitions, 1707 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:42:56,817 INFO L231 Difference]: Finished difference. Result has 105 places, 115 transitions, 999 flow [2023-08-26 11:42:56,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=999, PETRI_PLACES=105, PETRI_TRANSITIONS=115} [2023-08-26 11:42:56,818 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 36 predicate places. [2023-08-26 11:42:56,818 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 115 transitions, 999 flow [2023-08-26 11:42:56,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 106.2) internal successors, (531), 5 states have internal predecessors, (531), 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 11:42:56,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:56,819 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, 1] [2023-08-26 11:42:56,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:42:56,819 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:56,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:56,819 INFO L85 PathProgramCache]: Analyzing trace with hash 646968094, now seen corresponding path program 1 times [2023-08-26 11:42:56,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:56,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051080660] [2023-08-26 11:42:56,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:56,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:42:56,938 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 11:42:56,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:42:56,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051080660] [2023-08-26 11:42:56,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051080660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:42:56,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:42:56,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:42:56,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463224249] [2023-08-26 11:42:56,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:42:56,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:42:56,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:42:56,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:42:56,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:42:56,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 245 [2023-08-26 11:42:56,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 115 transitions, 999 flow. Second operand has 7 states, 7 states have (on average 111.42857142857143) internal successors, (780), 7 states have internal predecessors, (780), 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 11:42:56,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:42:56,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 245 [2023-08-26 11:42:56,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:42:57,547 INFO L124 PetriNetUnfolderBase]: 1894/4325 cut-off events. [2023-08-26 11:42:57,547 INFO L125 PetriNetUnfolderBase]: For 13225/13413 co-relation queries the response was YES. [2023-08-26 11:42:57,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15988 conditions, 4325 events. 1894/4325 cut-off events. For 13225/13413 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35421 event pairs, 159 based on Foata normal form. 226/4524 useless extension candidates. Maximal degree in co-relation 15962. Up to 846 conditions per place. [2023-08-26 11:42:57,572 INFO L140 encePairwiseOnDemand]: 235/245 looper letters, 79 selfloop transitions, 15 changer transitions 53/206 dead transitions. [2023-08-26 11:42:57,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 206 transitions, 1715 flow [2023-08-26 11:42:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:42:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:42:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1210 transitions. [2023-08-26 11:42:57,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49387755102040815 [2023-08-26 11:42:57,576 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1210 transitions. [2023-08-26 11:42:57,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1210 transitions. [2023-08-26 11:42:57,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:42:57,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1210 transitions. [2023-08-26 11:42:57,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 121.0) internal successors, (1210), 10 states have internal predecessors, (1210), 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 11:42:57,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 245.0) internal successors, (2695), 11 states have internal predecessors, (2695), 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 11:42:57,583 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 245.0) internal successors, (2695), 11 states have internal predecessors, (2695), 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 11:42:57,583 INFO L175 Difference]: Start difference. First operand has 105 places, 115 transitions, 999 flow. Second operand 10 states and 1210 transitions. [2023-08-26 11:42:57,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 206 transitions, 1715 flow [2023-08-26 11:42:57,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 206 transitions, 1677 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 11:42:57,639 INFO L231 Difference]: Finished difference. Result has 115 places, 108 transitions, 929 flow [2023-08-26 11:42:57,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=929, PETRI_PLACES=115, PETRI_TRANSITIONS=108} [2023-08-26 11:42:57,639 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, 46 predicate places. [2023-08-26 11:42:57,640 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 108 transitions, 929 flow [2023-08-26 11:42:57,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.42857142857143) internal successors, (780), 7 states have internal predecessors, (780), 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 11:42:57,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:42:57,640 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, 1] [2023-08-26 11:42:57,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:42:57,640 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting readerErr0ASSERT_VIOLATIONASSERT === [readerErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2023-08-26 11:42:57,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:42:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash -196069418, now seen corresponding path program 2 times [2023-08-26 11:42:57,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:42:57,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887364938] [2023-08-26 11:42:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:42:57,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:42:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:42:57,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:42:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:42:57,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:42:57,704 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:42:57,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONASSERT (22 of 23 remaining) [2023-08-26 11:42:57,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONASSERT (21 of 23 remaining) [2023-08-26 11:42:57,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2023-08-26 11:42:57,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2023-08-26 11:42:57,708 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2023-08-26 11:42:57,709 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 23 remaining) [2023-08-26 11:42:57,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONASSERT (0 of 23 remaining) [2023-08-26 11:42:57,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:42:57,711 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:42:57,717 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:42:57,717 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:42:57,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:42:57 BasicIcfg [2023-08-26 11:42:57,777 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:42:57,778 INFO L158 Benchmark]: Toolchain (without parser) took 18813.39ms. Allocated memory was 343.9MB in the beginning and 3.2GB in the end (delta: 2.9GB). Free memory was 302.0MB in the beginning and 2.3GB in the end (delta: -2.0GB). Peak memory consumption was 849.0MB. Max. memory is 16.0GB. [2023-08-26 11:42:57,778 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 343.9MB. Free memory is still 321.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:42:57,778 INFO L158 Benchmark]: CACSL2BoogieTranslator took 489.95ms. Allocated memory is still 343.9MB. Free memory was 302.0MB in the beginning and 282.0MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 11:42:57,778 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.45ms. Allocated memory is still 343.9MB. Free memory was 282.0MB in the beginning and 279.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:42:57,779 INFO L158 Benchmark]: Boogie Preprocessor took 50.03ms. Allocated memory is still 343.9MB. Free memory was 279.9MB in the beginning and 277.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:42:57,779 INFO L158 Benchmark]: RCFGBuilder took 501.88ms. Allocated memory is still 343.9MB. Free memory was 277.8MB in the beginning and 259.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 11:42:57,779 INFO L158 Benchmark]: TraceAbstraction took 17700.53ms. Allocated memory was 343.9MB in the beginning and 3.2GB in the end (delta: 2.9GB). Free memory was 259.0MB in the beginning and 2.3GB in the end (delta: -2.1GB). Peak memory consumption was 807.1MB. Max. memory is 16.0GB. [2023-08-26 11:42:57,780 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 343.9MB. Free memory is still 321.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 489.95ms. Allocated memory is still 343.9MB. Free memory was 302.0MB in the beginning and 282.0MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 65.45ms. Allocated memory is still 343.9MB. Free memory was 282.0MB in the beginning and 279.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 50.03ms. Allocated memory is still 343.9MB. Free memory was 279.9MB in the beginning and 277.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 501.88ms. Allocated memory is still 343.9MB. Free memory was 277.8MB in the beginning and 259.0MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 17700.53ms. Allocated memory was 343.9MB in the beginning and 3.2GB in the end (delta: 2.9GB). Free memory was 259.0MB in the beginning and 2.3GB in the end (delta: -2.1GB). Peak memory consumption was 807.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 128 PlacesBefore, 69 PlacesAfterwards, 119 TransitionsBefore, 59 TransitionsAfterwards, 4296 CoEnabledTransitionPairs, 6 FixpointIterations, 27 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 1 ChoiceCompositions, 109 TotalNumberOfCompositions, 15393 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6821, independent: 6520, independent conditional: 0, independent unconditional: 6520, dependent: 301, dependent conditional: 0, dependent unconditional: 301, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2352, independent: 2307, independent conditional: 0, independent unconditional: 2307, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6821, independent: 4213, independent conditional: 0, independent unconditional: 4213, dependent: 256, dependent conditional: 0, dependent unconditional: 256, unknown: 2352, unknown conditional: 0, unknown unconditional: 2352] , Statistics on independence cache: Total cache size (in pairs): 395, Positive cache size: 371, Positive conditional cache size: 0, Positive unconditional cache size: 371, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 16]: assertion can be violated assertion can be violated We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-2, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-1, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=0, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=1, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=2, w=0, x=0, y=0] [L743] 2 r = l [L745] 2 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] CALL 4 reach_error() [L16] COND FALSE 4 !(0) [L16] 4 __assert_fail ("0", "read_write_lock-2.c", 7, __extension__ __PRETTY_FUNCTION__) VAL [r=0, w=1, x=3, y=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 163 locations, 23 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: 17.5s, OverallIterations: 17, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 12.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 947 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 947 mSDsluCounter, 104 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 44 mSDsCounter, 45 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1974 IncrementalHoareTripleChecker+Invalid, 2019 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 45 mSolverCounterUnsat, 60 mSDtfsCounter, 1974 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=999occurred in iteration=15, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 169 NumberOfCodeBlocks, 169 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 131 ConstructedInterpolants, 0 QuantifiedInterpolants, 547 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 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 RESULT: Ultimate proved your program to be incorrect! [2023-08-26 11:42:57,806 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...