/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/queue.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:26:47,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:26:47,730 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 11:26:47,735 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:26:47,736 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:26:47,765 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:26:47,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:26:47,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:26:47,767 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:26:47,770 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:26:47,770 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:26:47,771 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:26:47,771 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:26:47,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:26:47,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:26:47,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:26:47,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:26:47,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:26:47,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:26:47,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:26:47,774 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:26:47,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:26:47,775 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:26:47,775 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:26:47,775 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:26:47,776 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:26:47,776 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:26:47,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:26:47,776 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:26:47,777 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:26:47,778 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:26:47,778 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:26:47,778 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:26:47,778 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:26:47,778 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:26:47,779 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:26:48,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:26:48,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:26:48,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:26:48,137 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:26:48,138 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:26:48,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/queue.i [2023-08-26 11:26:49,243 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:26:49,552 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:26:49,552 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/queue.i [2023-08-26 11:26:49,569 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf39eeca9/c07a910b20e4400985b7a4cfabd23bfb/FLAG4bacc796b [2023-08-26 11:26:49,580 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bf39eeca9/c07a910b20e4400985b7a4cfabd23bfb [2023-08-26 11:26:49,583 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:26:49,584 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:26:49,585 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:26:49,585 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:26:49,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:26:49,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:26:49" (1/1) ... [2023-08-26 11:26:49,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30164dca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:49, skipping insertion in model container [2023-08-26 11:26:49,589 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:26:49" (1/1) ... [2023-08-26 11:26:49,643 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:26:50,095 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:26:50,112 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:26:50,142 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-26 11:26:50,144 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [258] [2023-08-26 11:26:50,154 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [750] [2023-08-26 11:26:50,179 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:26:50,249 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:26:50,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50 WrapperNode [2023-08-26 11:26:50,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:26:50,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:26:50,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:26:50,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:26:50,258 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,329 INFO L138 Inliner]: procedures = 274, calls = 71, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 261 [2023-08-26 11:26:50,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:26:50,330 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:26:50,330 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:26:50,330 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:26:50,340 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,340 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,358 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,358 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,367 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,386 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,389 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:26:50,390 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:26:50,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:26:50,391 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:26:50,391 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (1/1) ... [2023-08-26 11:26:50,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:26:50,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:26:50,430 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 11:26:50,453 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 11:26:50,468 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:26:50,468 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:26:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:26:50,469 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:26:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:26:50,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:26:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 11:26:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:26:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 11:26:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:26:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:26:50,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:26:50,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:26:50,472 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 11:26:50,659 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:26:50,661 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:26:51,236 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:26:51,247 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:26:51,247 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:26:51,252 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:26:51 BoogieIcfgContainer [2023-08-26 11:26:51,252 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:26:51,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:26:51,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:26:51,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:26:51,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:26:49" (1/3) ... [2023-08-26 11:26:51,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de514ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:26:51, skipping insertion in model container [2023-08-26 11:26:51,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:26:50" (2/3) ... [2023-08-26 11:26:51,259 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de514ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:26:51, skipping insertion in model container [2023-08-26 11:26:51,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:26:51" (3/3) ... [2023-08-26 11:26:51,261 INFO L112 eAbstractionObserver]: Analyzing ICFG queue.i [2023-08-26 11:26:51,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:26:51,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 79 error locations. [2023-08-26 11:26:51,280 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:26:51,455 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 11:26:51,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 343 places, 354 transitions, 724 flow [2023-08-26 11:26:51,608 INFO L124 PetriNetUnfolderBase]: 18/352 cut-off events. [2023-08-26 11:26:51,608 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:26:51,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 352 events. 18/352 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 785 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 255. Up to 2 conditions per place. [2023-08-26 11:26:51,623 INFO L82 GeneralOperation]: Start removeDead. Operand has 343 places, 354 transitions, 724 flow [2023-08-26 11:26:51,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 332 places, 343 transitions, 695 flow [2023-08-26 11:26:51,640 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:26:51,657 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 332 places, 343 transitions, 695 flow [2023-08-26 11:26:51,663 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 332 places, 343 transitions, 695 flow [2023-08-26 11:26:51,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 332 places, 343 transitions, 695 flow [2023-08-26 11:26:51,788 INFO L124 PetriNetUnfolderBase]: 18/343 cut-off events. [2023-08-26 11:26:51,789 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:26:51,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 343 events. 18/343 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 748 event pairs, 0 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 255. Up to 2 conditions per place. [2023-08-26 11:26:51,806 INFO L119 LiptonReduction]: Number of co-enabled transitions 30836 [2023-08-26 11:27:05,628 INFO L134 LiptonReduction]: Checked pairs total: 108870 [2023-08-26 11:27:05,629 INFO L136 LiptonReduction]: Total number of compositions: 429 [2023-08-26 11:27:05,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:27:05,653 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;@2ae1591b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:27:05,654 INFO L358 AbstractCegarLoop]: Starting to check reachability of 141 error locations. [2023-08-26 11:27:05,655 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:27:05,656 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:27:05,656 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:27:05,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:05,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:27:05,657 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:05,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:05,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1480, now seen corresponding path program 1 times [2023-08-26 11:27:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:05,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206008467] [2023-08-26 11:27:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:05,779 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 11:27:05,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:05,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206008467] [2023-08-26 11:27:05,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206008467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:05,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:05,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:27:05,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30080683] [2023-08-26 11:27:05,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:05,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:27:05,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:05,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:27:05,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:27:05,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 783 [2023-08-26 11:27:05,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 144 transitions, 297 flow. Second operand has 2 states, 2 states have (on average 338.5) internal successors, (677), 2 states have internal predecessors, (677), 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 11:27:05,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:05,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 783 [2023-08-26 11:27:05,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:06,916 INFO L124 PetriNetUnfolderBase]: 7769/12595 cut-off events. [2023-08-26 11:27:06,916 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-08-26 11:27:06,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24493 conditions, 12595 events. 7769/12595 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 75678 event pairs, 6769 based on Foata normal form. 180/7030 useless extension candidates. Maximal degree in co-relation 24093. Up to 11783 conditions per place. [2023-08-26 11:27:07,003 INFO L140 encePairwiseOnDemand]: 734/783 looper letters, 83 selfloop transitions, 0 changer transitions 0/93 dead transitions. [2023-08-26 11:27:07,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 93 transitions, 361 flow [2023-08-26 11:27:07,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:27:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:27:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 808 transitions. [2023-08-26 11:27:07,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159642401021711 [2023-08-26 11:27:07,022 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 808 transitions. [2023-08-26 11:27:07,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 808 transitions. [2023-08-26 11:27:07,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:07,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 808 transitions. [2023-08-26 11:27:07,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 404.0) internal successors, (808), 2 states have internal predecessors, (808), 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 11:27:07,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 783.0) internal successors, (2349), 3 states have internal predecessors, (2349), 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 11:27:07,044 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 783.0) internal successors, (2349), 3 states have internal predecessors, (2349), 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 11:27:07,046 INFO L175 Difference]: Start difference. First operand has 140 places, 144 transitions, 297 flow. Second operand 2 states and 808 transitions. [2023-08-26 11:27:07,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 93 transitions, 361 flow [2023-08-26 11:27:07,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 93 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 11:27:07,055 INFO L231 Difference]: Finished difference. Result has 90 places, 93 transitions, 190 flow [2023-08-26 11:27:07,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=190, PETRI_PLACES=90, PETRI_TRANSITIONS=93} [2023-08-26 11:27:07,060 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -50 predicate places. [2023-08-26 11:27:07,060 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 93 transitions, 190 flow [2023-08-26 11:27:07,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 338.5) internal successors, (677), 2 states have internal predecessors, (677), 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 11:27:07,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:07,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:07,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:27:07,061 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:07,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1460123, now seen corresponding path program 1 times [2023-08-26 11:27:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:07,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49867776] [2023-08-26 11:27:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:07,307 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 11:27:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:07,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49867776] [2023-08-26 11:27:07,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49867776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:07,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:07,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:07,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345175553] [2023-08-26 11:27:07,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:07,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:07,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:07,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:07,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 248 out of 783 [2023-08-26 11:27:07,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 93 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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 11:27:07,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:07,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 248 of 783 [2023-08-26 11:27:07,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:08,271 INFO L124 PetriNetUnfolderBase]: 8368/13322 cut-off events. [2023-08-26 11:27:08,271 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:08,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 13322 events. 8368/13322 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 77865 event pairs, 7332 based on Foata normal form. 0/7053 useless extension candidates. Maximal degree in co-relation 26096. Up to 12681 conditions per place. [2023-08-26 11:27:08,412 INFO L140 encePairwiseOnDemand]: 780/783 looper letters, 83 selfloop transitions, 1 changer transitions 0/91 dead transitions. [2023-08-26 11:27:08,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 91 transitions, 354 flow [2023-08-26 11:27:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 830 transitions. [2023-08-26 11:27:08,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35334184759472115 [2023-08-26 11:27:08,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 830 transitions. [2023-08-26 11:27:08,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 830 transitions. [2023-08-26 11:27:08,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:08,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 830 transitions. [2023-08-26 11:27:08,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 276.6666666666667) internal successors, (830), 3 states have internal predecessors, (830), 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 11:27:08,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:08,430 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:08,430 INFO L175 Difference]: Start difference. First operand has 90 places, 93 transitions, 190 flow. Second operand 3 states and 830 transitions. [2023-08-26 11:27:08,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 91 transitions, 354 flow [2023-08-26 11:27:08,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 91 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:27:08,434 INFO L231 Difference]: Finished difference. Result has 90 places, 91 transitions, 188 flow [2023-08-26 11:27:08,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=188, PETRI_PLACES=90, PETRI_TRANSITIONS=91} [2023-08-26 11:27:08,435 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -50 predicate places. [2023-08-26 11:27:08,436 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 91 transitions, 188 flow [2023-08-26 11:27:08,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.0) internal successors, (747), 3 states have internal predecessors, (747), 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 11:27:08,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:08,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:08,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:27:08,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:08,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:08,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1460122, now seen corresponding path program 1 times [2023-08-26 11:27:08,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:08,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502562914] [2023-08-26 11:27:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:08,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:08,602 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 11:27:08,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:08,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502562914] [2023-08-26 11:27:08,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502562914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:08,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:08,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:08,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61187980] [2023-08-26 11:27:08,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:08,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:08,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:08,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 783 [2023-08-26 11:27:08,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 91 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 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 11:27:08,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:08,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 783 [2023-08-26 11:27:08,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:09,549 INFO L124 PetriNetUnfolderBase]: 8293/13176 cut-off events. [2023-08-26 11:27:09,549 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:09,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25812 conditions, 13176 events. 8293/13176 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 76641 event pairs, 7265 based on Foata normal form. 0/7009 useless extension candidates. Maximal degree in co-relation 25808. Up to 12538 conditions per place. [2023-08-26 11:27:09,624 INFO L140 encePairwiseOnDemand]: 780/783 looper letters, 81 selfloop transitions, 1 changer transitions 0/89 dead transitions. [2023-08-26 11:27:09,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 348 flow [2023-08-26 11:27:09,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:09,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 834 transitions. [2023-08-26 11:27:09,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3550446998722861 [2023-08-26 11:27:09,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 834 transitions. [2023-08-26 11:27:09,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 834 transitions. [2023-08-26 11:27:09,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:09,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 834 transitions. [2023-08-26 11:27:09,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.0) internal successors, (834), 3 states have internal predecessors, (834), 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 11:27:09,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:09,636 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:09,636 INFO L175 Difference]: Start difference. First operand has 90 places, 91 transitions, 188 flow. Second operand 3 states and 834 transitions. [2023-08-26 11:27:09,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 348 flow [2023-08-26 11:27:09,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 347 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:09,640 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 185 flow [2023-08-26 11:27:09,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2023-08-26 11:27:09,641 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -51 predicate places. [2023-08-26 11:27:09,642 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 185 flow [2023-08-26 11:27:09,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.0) internal successors, (753), 3 states have internal predecessors, (753), 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 11:27:09,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:09,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:09,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:27:09,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:09,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:09,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1460183, now seen corresponding path program 1 times [2023-08-26 11:27:09,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:09,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724517855] [2023-08-26 11:27:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:09,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:09,907 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 11:27:09,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:09,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724517855] [2023-08-26 11:27:09,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724517855] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:09,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:09,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:09,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469141580] [2023-08-26 11:27:09,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:09,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:09,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:09,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:09,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 783 [2023-08-26 11:27:09,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 185 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 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 11:27:09,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:09,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 783 [2023-08-26 11:27:09,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:10,665 INFO L124 PetriNetUnfolderBase]: 7297/11590 cut-off events. [2023-08-26 11:27:10,665 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:10,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22685 conditions, 11590 events. 7297/11590 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 65947 event pairs, 6337 based on Foata normal form. 0/6477 useless extension candidates. Maximal degree in co-relation 22681. Up to 11004 conditions per place. [2023-08-26 11:27:10,720 INFO L140 encePairwiseOnDemand]: 777/783 looper letters, 76 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-26 11:27:10,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 329 flow [2023-08-26 11:27:10,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:10,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2023-08-26 11:27:10,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3503618561089826 [2023-08-26 11:27:10,723 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2023-08-26 11:27:10,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2023-08-26 11:27:10,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:10,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2023-08-26 11:27:10,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 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 11:27:10,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:10,731 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:10,731 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 185 flow. Second operand 3 states and 823 transitions. [2023-08-26 11:27:10,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 329 flow [2023-08-26 11:27:10,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 84 transitions, 328 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:10,734 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 176 flow [2023-08-26 11:27:10,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2023-08-26 11:27:10,735 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -55 predicate places. [2023-08-26 11:27:10,735 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 176 flow [2023-08-26 11:27:10,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 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 11:27:10,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:10,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:27:10,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:27:10,736 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:10,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1460182, now seen corresponding path program 1 times [2023-08-26 11:27:10,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:10,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884132156] [2023-08-26 11:27:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:10,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:10,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:10,852 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 11:27:10,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884132156] [2023-08-26 11:27:10,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884132156] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:10,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:10,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735570473] [2023-08-26 11:27:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:10,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:10,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:10,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 783 [2023-08-26 11:27:10,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 176 flow. Second operand 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 11:27:10,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:10,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 783 [2023-08-26 11:27:10,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:11,502 INFO L124 PetriNetUnfolderBase]: 6514/10347 cut-off events. [2023-08-26 11:27:11,503 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:11,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20234 conditions, 10347 events. 6514/10347 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 57631 event pairs, 5610 based on Foata normal form. 0/6048 useless extension candidates. Maximal degree in co-relation 20230. Up to 9801 conditions per place. [2023-08-26 11:27:11,549 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 72 selfloop transitions, 1 changer transitions 0/80 dead transitions. [2023-08-26 11:27:11,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 80 transitions, 314 flow [2023-08-26 11:27:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:11,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 809 transitions. [2023-08-26 11:27:11,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444018731375053 [2023-08-26 11:27:11,553 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 809 transitions. [2023-08-26 11:27:11,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 809 transitions. [2023-08-26 11:27:11,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:11,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 809 transitions. [2023-08-26 11:27:11,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.6666666666667) internal successors, (809), 3 states have internal predecessors, (809), 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 11:27:11,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:11,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:11,561 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 176 flow. Second operand 3 states and 809 transitions. [2023-08-26 11:27:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 80 transitions, 314 flow [2023-08-26 11:27:11,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 80 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:11,562 INFO L231 Difference]: Finished difference. Result has 82 places, 80 transitions, 169 flow [2023-08-26 11:27:11,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=82, PETRI_TRANSITIONS=80} [2023-08-26 11:27:11,563 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -58 predicate places. [2023-08-26 11:27:11,563 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 80 transitions, 169 flow [2023-08-26 11:27:11,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 11:27:11,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:11,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 11:27:11,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:27:11,564 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:11,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:11,565 INFO L85 PathProgramCache]: Analyzing trace with hash 45264269, now seen corresponding path program 1 times [2023-08-26 11:27:11,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:11,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950751742] [2023-08-26 11:27:11,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:11,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:12,181 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 11:27:12,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950751742] [2023-08-26 11:27:12,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950751742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:12,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:12,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:12,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000038245] [2023-08-26 11:27:12,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:12,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:12,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:12,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:12,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:12,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 276 out of 783 [2023-08-26 11:27:12,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 80 transitions, 169 flow. Second operand has 3 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 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 11:27:12,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:12,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 276 of 783 [2023-08-26 11:27:12,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:12,892 INFO L124 PetriNetUnfolderBase]: 6222/9968 cut-off events. [2023-08-26 11:27:12,892 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 11:27:12,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19409 conditions, 9968 events. 6222/9968 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 56122 event pairs, 5141 based on Foata normal form. 0/5890 useless extension candidates. Maximal degree in co-relation 19405. Up to 9351 conditions per place. [2023-08-26 11:27:12,928 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 73 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-26 11:27:12,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 85 transitions, 333 flow [2023-08-26 11:27:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-08-26 11:27:12,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38569604086845466 [2023-08-26 11:27:12,932 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-08-26 11:27:12,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-08-26 11:27:12,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:12,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-08-26 11:27:12,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 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 11:27:12,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:12,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:12,941 INFO L175 Difference]: Start difference. First operand has 82 places, 80 transitions, 169 flow. Second operand 3 states and 906 transitions. [2023-08-26 11:27:12,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 85 transitions, 333 flow [2023-08-26 11:27:12,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 85 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:12,943 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 194 flow [2023-08-26 11:27:12,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2023-08-26 11:27:12,946 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -56 predicate places. [2023-08-26 11:27:12,947 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 194 flow [2023-08-26 11:27:12,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 277.3333333333333) internal successors, (832), 3 states have internal predecessors, (832), 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 11:27:12,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:12,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:12,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:27:12,948 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:12,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:12,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1403192733, now seen corresponding path program 1 times [2023-08-26 11:27:12,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:12,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633273177] [2023-08-26 11:27:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:12,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:13,322 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 11:27:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633273177] [2023-08-26 11:27:13,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633273177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:13,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:13,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:13,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209594185] [2023-08-26 11:27:13,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:13,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:13,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:13,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:13,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:13,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 783 [2023-08-26 11:27:13,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 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 11:27:13,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:13,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 783 [2023-08-26 11:27:13,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:14,063 INFO L124 PetriNetUnfolderBase]: 6767/10742 cut-off events. [2023-08-26 11:27:14,063 INFO L125 PetriNetUnfolderBase]: For 283/283 co-relation queries the response was YES. [2023-08-26 11:27:14,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21380 conditions, 10742 events. 6767/10742 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 61142 event pairs, 1596 based on Foata normal form. 45/6432 useless extension candidates. Maximal degree in co-relation 21375. Up to 9846 conditions per place. [2023-08-26 11:27:14,104 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 90 selfloop transitions, 6 changer transitions 0/103 dead transitions. [2023-08-26 11:27:14,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 432 flow [2023-08-26 11:27:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2023-08-26 11:27:14,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32907620263942106 [2023-08-26 11:27:14,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2023-08-26 11:27:14,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2023-08-26 11:27:14,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:14,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2023-08-26 11:27:14,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 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 11:27:14,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:14,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:14,114 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 194 flow. Second operand 3 states and 773 transitions. [2023-08-26 11:27:14,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 432 flow [2023-08-26 11:27:14,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 103 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:14,116 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 226 flow [2023-08-26 11:27:14,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=226, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2023-08-26 11:27:14,117 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -54 predicate places. [2023-08-26 11:27:14,117 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 226 flow [2023-08-26 11:27:14,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 227.25) internal successors, (909), 4 states have internal predecessors, (909), 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 11:27:14,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:14,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:14,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:27:14,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:14,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:14,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1403209311, now seen corresponding path program 1 times [2023-08-26 11:27:14,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:14,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885030702] [2023-08-26 11:27:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:14,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:14,164 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 11:27:14,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:14,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885030702] [2023-08-26 11:27:14,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885030702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:14,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:14,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:14,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377117659] [2023-08-26 11:27:14,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:14,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:14,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 783 [2023-08-26 11:27:14,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 246.25) internal successors, (985), 4 states have internal predecessors, (985), 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 11:27:14,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:14,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 783 [2023-08-26 11:27:14,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:14,696 INFO L124 PetriNetUnfolderBase]: 4896/7908 cut-off events. [2023-08-26 11:27:14,696 INFO L125 PetriNetUnfolderBase]: For 563/563 co-relation queries the response was YES. [2023-08-26 11:27:14,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16218 conditions, 7908 events. 4896/7908 cut-off events. For 563/563 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 43225 event pairs, 4050 based on Foata normal form. 0/5179 useless extension candidates. Maximal degree in co-relation 16212. Up to 7476 conditions per place. [2023-08-26 11:27:14,730 INFO L140 encePairwiseOnDemand]: 781/783 looper letters, 77 selfloop transitions, 1 changer transitions 0/85 dead transitions. [2023-08-26 11:27:14,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 85 transitions, 380 flow [2023-08-26 11:27:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:14,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 808 transitions. [2023-08-26 11:27:14,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3439761600681141 [2023-08-26 11:27:14,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 808 transitions. [2023-08-26 11:27:14,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 808 transitions. [2023-08-26 11:27:14,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:14,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 808 transitions. [2023-08-26 11:27:14,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 269.3333333333333) internal successors, (808), 3 states have internal predecessors, (808), 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 11:27:14,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:14,740 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:14,740 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 226 flow. Second operand 3 states and 808 transitions. [2023-08-26 11:27:14,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 85 transitions, 380 flow [2023-08-26 11:27:14,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 85 transitions, 374 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:14,744 INFO L231 Difference]: Finished difference. Result has 86 places, 85 transitions, 220 flow [2023-08-26 11:27:14,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=86, PETRI_TRANSITIONS=85} [2023-08-26 11:27:14,746 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -54 predicate places. [2023-08-26 11:27:14,747 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 85 transitions, 220 flow [2023-08-26 11:27:14,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 246.25) internal successors, (985), 4 states have internal predecessors, (985), 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 11:27:14,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:14,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:14,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:27:14,747 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:14,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1403209312, now seen corresponding path program 1 times [2023-08-26 11:27:14,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:14,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980009928] [2023-08-26 11:27:14,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:14,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:14,786 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 11:27:14,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:14,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980009928] [2023-08-26 11:27:14,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980009928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:14,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:14,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:14,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421872502] [2023-08-26 11:27:14,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:14,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:14,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:14,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:14,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 783 [2023-08-26 11:27:14,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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 11:27:14,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:14,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 783 [2023-08-26 11:27:14,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:15,195 INFO L124 PetriNetUnfolderBase]: 3025/5074 cut-off events. [2023-08-26 11:27:15,195 INFO L125 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2023-08-26 11:27:15,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10408 conditions, 5074 events. 3025/5074 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 26876 event pairs, 2444 based on Foata normal form. 0/3805 useless extension candidates. Maximal degree in co-relation 10402. Up to 4784 conditions per place. [2023-08-26 11:27:15,215 INFO L140 encePairwiseOnDemand]: 781/783 looper letters, 76 selfloop transitions, 1 changer transitions 0/84 dead transitions. [2023-08-26 11:27:15,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 372 flow [2023-08-26 11:27:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:15,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:15,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 822 transitions. [2023-08-26 11:27:15,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3499361430395913 [2023-08-26 11:27:15,218 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 822 transitions. [2023-08-26 11:27:15,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 822 transitions. [2023-08-26 11:27:15,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:15,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 822 transitions. [2023-08-26 11:27:15,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 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 11:27:15,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:15,224 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:15,224 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 220 flow. Second operand 3 states and 822 transitions. [2023-08-26 11:27:15,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 372 flow [2023-08-26 11:27:15,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 371 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:15,227 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 219 flow [2023-08-26 11:27:15,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2023-08-26 11:27:15,228 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -54 predicate places. [2023-08-26 11:27:15,228 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 219 flow [2023-08-26 11:27:15,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 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 11:27:15,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:15,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 11:27:15,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:27:15,230 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:15,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:15,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1403193547, now seen corresponding path program 1 times [2023-08-26 11:27:15,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:15,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291415051] [2023-08-26 11:27:15,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:15,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:15,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:15,411 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 11:27:15,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:15,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291415051] [2023-08-26 11:27:15,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291415051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:15,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:15,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:15,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838780365] [2023-08-26 11:27:15,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:15,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:15,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:15,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:15,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:15,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 227 out of 783 [2023-08-26 11:27:15,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 219 flow. Second operand has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 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 11:27:15,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:15,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 227 of 783 [2023-08-26 11:27:15,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:15,860 INFO L124 PetriNetUnfolderBase]: 3124/5323 cut-off events. [2023-08-26 11:27:15,860 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2023-08-26 11:27:15,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10772 conditions, 5323 events. 3124/5323 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 28639 event pairs, 1583 based on Foata normal form. 0/4040 useless extension candidates. Maximal degree in co-relation 10766. Up to 2539 conditions per place. [2023-08-26 11:27:15,880 INFO L140 encePairwiseOnDemand]: 777/783 looper letters, 103 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2023-08-26 11:27:15,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 114 transitions, 492 flow [2023-08-26 11:27:15,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:27:15,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:27:15,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1011 transitions. [2023-08-26 11:27:15,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227969348659004 [2023-08-26 11:27:15,883 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1011 transitions. [2023-08-26 11:27:15,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1011 transitions. [2023-08-26 11:27:15,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:15,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1011 transitions. [2023-08-26 11:27:15,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 252.75) internal successors, (1011), 4 states have internal predecessors, (1011), 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 11:27:15,890 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 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 11:27:15,891 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 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 11:27:15,891 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 219 flow. Second operand 4 states and 1011 transitions. [2023-08-26 11:27:15,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 114 transitions, 492 flow [2023-08-26 11:27:15,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 114 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:15,894 INFO L231 Difference]: Finished difference. Result has 87 places, 81 transitions, 213 flow [2023-08-26 11:27:15,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=87, PETRI_TRANSITIONS=81} [2023-08-26 11:27:15,895 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -53 predicate places. [2023-08-26 11:27:15,895 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 81 transitions, 213 flow [2023-08-26 11:27:15,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 228.25) internal successors, (913), 4 states have internal predecessors, (913), 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 11:27:15,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:15,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 11:27:15,896 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:15,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:15,896 INFO L85 PathProgramCache]: Analyzing trace with hash 92194191, now seen corresponding path program 1 times [2023-08-26 11:27:15,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:15,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827819366] [2023-08-26 11:27:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:15,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:15,939 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 11:27:15,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:15,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827819366] [2023-08-26 11:27:15,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827819366] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:15,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:15,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:15,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664282077] [2023-08-26 11:27:15,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:15,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:15,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:15,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:15,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:15,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 783 [2023-08-26 11:27:15,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 81 transitions, 213 flow. Second operand has 3 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 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 11:27:15,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:15,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 783 [2023-08-26 11:27:15,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:16,364 INFO L124 PetriNetUnfolderBase]: 2135/3653 cut-off events. [2023-08-26 11:27:16,364 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2023-08-26 11:27:16,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7425 conditions, 3653 events. 2135/3653 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 16968 event pairs, 1079 based on Foata normal form. 0/2855 useless extension candidates. Maximal degree in co-relation 7418. Up to 2187 conditions per place. [2023-08-26 11:27:16,382 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 93 selfloop transitions, 3 changer transitions 3/108 dead transitions. [2023-08-26 11:27:16,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 108 transitions, 459 flow [2023-08-26 11:27:16,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1094 transitions. [2023-08-26 11:27:16,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46573009791400594 [2023-08-26 11:27:16,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1094 transitions. [2023-08-26 11:27:16,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1094 transitions. [2023-08-26 11:27:16,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:16,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1094 transitions. [2023-08-26 11:27:16,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 364.6666666666667) internal successors, (1094), 3 states have internal predecessors, (1094), 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 11:27:16,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:16,406 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:16,407 INFO L175 Difference]: Start difference. First operand has 87 places, 81 transitions, 213 flow. Second operand 3 states and 1094 transitions. [2023-08-26 11:27:16,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 108 transitions, 459 flow [2023-08-26 11:27:16,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 108 transitions, 447 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 11:27:16,410 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 197 flow [2023-08-26 11:27:16,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=197, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-08-26 11:27:16,410 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -55 predicate places. [2023-08-26 11:27:16,410 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 197 flow [2023-08-26 11:27:16,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.6666666666667) internal successors, (1004), 3 states have internal predecessors, (1004), 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 11:27:16,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:16,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:16,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 11:27:16,411 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:16,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:16,412 INFO L85 PathProgramCache]: Analyzing trace with hash -858617101, now seen corresponding path program 1 times [2023-08-26 11:27:16,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:16,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660681027] [2023-08-26 11:27:16,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:16,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:16,506 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 11:27:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:16,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660681027] [2023-08-26 11:27:16,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660681027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:16,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:16,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:27:16,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362497799] [2023-08-26 11:27:16,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:16,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:16,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:16,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:16,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:16,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 247 out of 783 [2023-08-26 11:27:16,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 197 flow. Second operand has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 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 11:27:16,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:16,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 247 of 783 [2023-08-26 11:27:16,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:16,835 INFO L124 PetriNetUnfolderBase]: 1962/3349 cut-off events. [2023-08-26 11:27:16,835 INFO L125 PetriNetUnfolderBase]: For 200/200 co-relation queries the response was YES. [2023-08-26 11:27:16,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6891 conditions, 3349 events. 1962/3349 cut-off events. For 200/200 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14979 event pairs, 1538 based on Foata normal form. 0/2581 useless extension candidates. Maximal degree in co-relation 6884. Up to 3177 conditions per place. [2023-08-26 11:27:16,849 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 68 selfloop transitions, 1 changer transitions 0/76 dead transitions. [2023-08-26 11:27:16,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 76 transitions, 329 flow [2023-08-26 11:27:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 810 transitions. [2023-08-26 11:27:16,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3448275862068966 [2023-08-26 11:27:16,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 810 transitions. [2023-08-26 11:27:16,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 810 transitions. [2023-08-26 11:27:16,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:16,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 810 transitions. [2023-08-26 11:27:16,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 270.0) internal successors, (810), 3 states have internal predecessors, (810), 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 11:27:16,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:16,858 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:16,858 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 197 flow. Second operand 3 states and 810 transitions. [2023-08-26 11:27:16,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 76 transitions, 329 flow [2023-08-26 11:27:16,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 76 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:16,860 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 190 flow [2023-08-26 11:27:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2023-08-26 11:27:16,861 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -57 predicate places. [2023-08-26 11:27:16,861 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 190 flow [2023-08-26 11:27:16,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.33333333333334) internal successors, (751), 3 states have internal predecessors, (751), 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 11:27:16,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:16,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:16,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 11:27:16,862 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:16,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -858617099, now seen corresponding path program 1 times [2023-08-26 11:27:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659535287] [2023-08-26 11:27:16,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:16,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:17,404 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 11:27:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:17,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659535287] [2023-08-26 11:27:17,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659535287] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:17,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:17,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:27:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647962265] [2023-08-26 11:27:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:17,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:27:17,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:27:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:27:17,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 783 [2023-08-26 11:27:17,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 190 flow. Second operand has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 11:27:17,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:17,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 783 [2023-08-26 11:27:17,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:18,050 INFO L124 PetriNetUnfolderBase]: 2302/3968 cut-off events. [2023-08-26 11:27:18,050 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-08-26 11:27:18,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8103 conditions, 3968 events. 2302/3968 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 19156 event pairs, 1320 based on Foata normal form. 0/3103 useless extension candidates. Maximal degree in co-relation 8096. Up to 3080 conditions per place. [2023-08-26 11:27:18,061 INFO L140 encePairwiseOnDemand]: 766/783 looper letters, 90 selfloop transitions, 19 changer transitions 0/117 dead transitions. [2023-08-26 11:27:18,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 117 transitions, 504 flow [2023-08-26 11:27:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:27:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:27:18,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1537 transitions. [2023-08-26 11:27:18,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271604938271605 [2023-08-26 11:27:18,065 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1537 transitions. [2023-08-26 11:27:18,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1537 transitions. [2023-08-26 11:27:18,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:18,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1537 transitions. [2023-08-26 11:27:18,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 256.1666666666667) internal successors, (1537), 6 states have internal predecessors, (1537), 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 11:27:18,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 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 11:27:18,075 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 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 11:27:18,075 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 190 flow. Second operand 6 states and 1537 transitions. [2023-08-26 11:27:18,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 117 transitions, 504 flow [2023-08-26 11:27:18,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 117 transitions, 503 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:18,077 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 320 flow [2023-08-26 11:27:18,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2023-08-26 11:27:18,078 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -49 predicate places. [2023-08-26 11:27:18,078 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 320 flow [2023-08-26 11:27:18,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 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 11:27:18,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:18,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:18,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 11:27:18,079 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:18,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash 478451461, now seen corresponding path program 1 times [2023-08-26 11:27:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:18,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407130625] [2023-08-26 11:27:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:18,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:18,233 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 11:27:18,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:18,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407130625] [2023-08-26 11:27:18,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407130625] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:18,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:18,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:27:18,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742855331] [2023-08-26 11:27:18,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:18,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:27:18,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:18,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:27:18,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:27:18,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 783 [2023-08-26 11:27:18,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 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 11:27:18,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:18,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 783 [2023-08-26 11:27:18,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:18,564 INFO L124 PetriNetUnfolderBase]: 2345/4008 cut-off events. [2023-08-26 11:27:18,564 INFO L125 PetriNetUnfolderBase]: For 815/815 co-relation queries the response was YES. [2023-08-26 11:27:18,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9129 conditions, 4008 events. 2345/4008 cut-off events. For 815/815 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 18879 event pairs, 1782 based on Foata normal form. 0/3296 useless extension candidates. Maximal degree in co-relation 9119. Up to 3808 conditions per place. [2023-08-26 11:27:18,579 INFO L140 encePairwiseOnDemand]: 781/783 looper letters, 80 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-26 11:27:18,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 88 transitions, 480 flow [2023-08-26 11:27:18,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 801 transitions. [2023-08-26 11:27:18,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34099616858237547 [2023-08-26 11:27:18,582 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 801 transitions. [2023-08-26 11:27:18,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 801 transitions. [2023-08-26 11:27:18,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:18,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 801 transitions. [2023-08-26 11:27:18,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 267.0) internal successors, (801), 3 states have internal predecessors, (801), 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 11:27:18,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:18,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:18,587 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 320 flow. Second operand 3 states and 801 transitions. [2023-08-26 11:27:18,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 88 transitions, 480 flow [2023-08-26 11:27:18,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 88 transitions, 472 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:18,591 INFO L231 Difference]: Finished difference. Result has 91 places, 88 transitions, 312 flow [2023-08-26 11:27:18,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=91, PETRI_TRANSITIONS=88} [2023-08-26 11:27:18,591 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -49 predicate places. [2023-08-26 11:27:18,591 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 88 transitions, 312 flow [2023-08-26 11:27:18,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 247.75) internal successors, (991), 4 states have internal predecessors, (991), 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 11:27:18,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:18,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:18,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 11:27:18,592 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:18,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:18,592 INFO L85 PathProgramCache]: Analyzing trace with hash -191198982, now seen corresponding path program 1 times [2023-08-26 11:27:18,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:18,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085222762] [2023-08-26 11:27:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:18,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:18,645 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 11:27:18,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:18,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085222762] [2023-08-26 11:27:18,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085222762] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:18,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:18,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:27:18,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132441694] [2023-08-26 11:27:18,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:18,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:27:18,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:18,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:27:18,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:27:18,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 783 [2023-08-26 11:27:18,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 88 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 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 11:27:18,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:18,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 783 [2023-08-26 11:27:18,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:18,969 INFO L124 PetriNetUnfolderBase]: 2143/3745 cut-off events. [2023-08-26 11:27:18,969 INFO L125 PetriNetUnfolderBase]: For 743/743 co-relation queries the response was YES. [2023-08-26 11:27:18,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8471 conditions, 3745 events. 2143/3745 cut-off events. For 743/743 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 18071 event pairs, 1594 based on Foata normal form. 19/3182 useless extension candidates. Maximal degree in co-relation 8460. Up to 3424 conditions per place. [2023-08-26 11:27:18,985 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 78 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2023-08-26 11:27:18,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 94 transitions, 496 flow [2023-08-26 11:27:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:27:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:27:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1065 transitions. [2023-08-26 11:27:18,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45338441890166026 [2023-08-26 11:27:18,987 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1065 transitions. [2023-08-26 11:27:18,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1065 transitions. [2023-08-26 11:27:18,988 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:18,988 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1065 transitions. [2023-08-26 11:27:18,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 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 11:27:18,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:18,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:27:18,993 INFO L175 Difference]: Start difference. First operand has 91 places, 88 transitions, 312 flow. Second operand 3 states and 1065 transitions. [2023-08-26 11:27:18,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 94 transitions, 496 flow [2023-08-26 11:27:18,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 94 transitions, 495 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:27:18,996 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 319 flow [2023-08-26 11:27:18,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2023-08-26 11:27:18,997 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -48 predicate places. [2023-08-26 11:27:18,997 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 319 flow [2023-08-26 11:27:18,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 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 11:27:18,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:18,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:18,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:27:18,998 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:18,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash 941677958, now seen corresponding path program 1 times [2023-08-26 11:27:18,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:18,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255034729] [2023-08-26 11:27:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:18,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:19,493 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 11:27:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:19,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255034729] [2023-08-26 11:27:19,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255034729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:19,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:27:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130891407] [2023-08-26 11:27:19,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:19,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:27:19,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:27:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:27:19,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 783 [2023-08-26 11:27:19,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 319 flow. Second operand has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 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 11:27:19,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:19,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 783 [2023-08-26 11:27:19,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:20,005 INFO L124 PetriNetUnfolderBase]: 2474/4243 cut-off events. [2023-08-26 11:27:20,006 INFO L125 PetriNetUnfolderBase]: For 958/958 co-relation queries the response was YES. [2023-08-26 11:27:20,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9789 conditions, 4243 events. 2474/4243 cut-off events. For 958/958 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 20306 event pairs, 808 based on Foata normal form. 9/3522 useless extension candidates. Maximal degree in co-relation 9778. Up to 3680 conditions per place. [2023-08-26 11:27:20,024 INFO L140 encePairwiseOnDemand]: 774/783 looper letters, 98 selfloop transitions, 14 changer transitions 0/119 dead transitions. [2023-08-26 11:27:20,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 119 transitions, 651 flow [2023-08-26 11:27:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:27:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:27:20,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1119 transitions. [2023-08-26 11:27:20,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.285823754789272 [2023-08-26 11:27:20,027 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1119 transitions. [2023-08-26 11:27:20,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1119 transitions. [2023-08-26 11:27:20,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:20,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1119 transitions. [2023-08-26 11:27:20,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.8) internal successors, (1119), 5 states have internal predecessors, (1119), 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 11:27:20,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 783.0) internal successors, (4698), 6 states have internal predecessors, (4698), 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 11:27:20,033 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 783.0) internal successors, (4698), 6 states have internal predecessors, (4698), 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 11:27:20,033 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 319 flow. Second operand 5 states and 1119 transitions. [2023-08-26 11:27:20,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 119 transitions, 651 flow [2023-08-26 11:27:20,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 119 transitions, 635 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:27:20,038 INFO L231 Difference]: Finished difference. Result has 97 places, 94 transitions, 406 flow [2023-08-26 11:27:20,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=97, PETRI_TRANSITIONS=94} [2023-08-26 11:27:20,039 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -43 predicate places. [2023-08-26 11:27:20,039 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 94 transitions, 406 flow [2023-08-26 11:27:20,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 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 11:27:20,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:20,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:20,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 11:27:20,040 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:20,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash 478365404, now seen corresponding path program 2 times [2023-08-26 11:27:20,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:20,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157179192] [2023-08-26 11:27:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:20,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:20,704 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 11:27:20,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:20,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157179192] [2023-08-26 11:27:20,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157179192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:20,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:20,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:27:20,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482780366] [2023-08-26 11:27:20,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:20,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:27:20,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:20,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:27:20,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:27:20,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 783 [2023-08-26 11:27:20,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 94 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 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 11:27:20,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:20,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 783 [2023-08-26 11:27:20,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:21,425 INFO L124 PetriNetUnfolderBase]: 2526/4343 cut-off events. [2023-08-26 11:27:21,426 INFO L125 PetriNetUnfolderBase]: For 1259/1259 co-relation queries the response was YES. [2023-08-26 11:27:21,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10230 conditions, 4343 events. 2526/4343 cut-off events. For 1259/1259 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 20961 event pairs, 1831 based on Foata normal form. 9/3612 useless extension candidates. Maximal degree in co-relation 10216. Up to 3936 conditions per place. [2023-08-26 11:27:21,442 INFO L140 encePairwiseOnDemand]: 776/783 looper letters, 96 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2023-08-26 11:27:21,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 113 transitions, 682 flow [2023-08-26 11:27:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:27:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:27:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1314 transitions. [2023-08-26 11:27:21,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2796934865900383 [2023-08-26 11:27:21,445 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1314 transitions. [2023-08-26 11:27:21,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1314 transitions. [2023-08-26 11:27:21,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:21,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1314 transitions. [2023-08-26 11:27:21,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.0) internal successors, (1314), 6 states have internal predecessors, (1314), 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 11:27:21,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 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 11:27:21,453 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 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 11:27:21,453 INFO L175 Difference]: Start difference. First operand has 97 places, 94 transitions, 406 flow. Second operand 6 states and 1314 transitions. [2023-08-26 11:27:21,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 113 transitions, 682 flow [2023-08-26 11:27:21,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 113 transitions, 680 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:27:21,458 INFO L231 Difference]: Finished difference. Result has 103 places, 96 transitions, 452 flow [2023-08-26 11:27:21,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=103, PETRI_TRANSITIONS=96} [2023-08-26 11:27:21,458 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -37 predicate places. [2023-08-26 11:27:21,458 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 96 transitions, 452 flow [2023-08-26 11:27:21,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 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 11:27:21,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:21,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:21,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 11:27:21,459 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:21,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -357649760, now seen corresponding path program 3 times [2023-08-26 11:27:21,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:21,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637225545] [2023-08-26 11:27:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:21,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:22,123 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 11:27:22,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:22,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637225545] [2023-08-26 11:27:22,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637225545] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:22,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:22,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 11:27:22,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527394175] [2023-08-26 11:27:22,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:22,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 11:27:22,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 11:27:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 11:27:22,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 783 [2023-08-26 11:27:22,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 96 transitions, 452 flow. Second operand has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 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 11:27:22,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:22,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 783 [2023-08-26 11:27:22,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:22,838 INFO L124 PetriNetUnfolderBase]: 2469/4281 cut-off events. [2023-08-26 11:27:22,838 INFO L125 PetriNetUnfolderBase]: For 1526/1526 co-relation queries the response was YES. [2023-08-26 11:27:22,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10014 conditions, 4281 events. 2469/4281 cut-off events. For 1526/1526 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 20641 event pairs, 1781 based on Foata normal form. 18/3567 useless extension candidates. Maximal degree in co-relation 9998. Up to 3675 conditions per place. [2023-08-26 11:27:22,857 INFO L140 encePairwiseOnDemand]: 776/783 looper letters, 89 selfloop transitions, 12 changer transitions 0/108 dead transitions. [2023-08-26 11:27:22,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 108 transitions, 665 flow [2023-08-26 11:27:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:27:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:27:22,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1312 transitions. [2023-08-26 11:27:22,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2792677735206471 [2023-08-26 11:27:22,861 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1312 transitions. [2023-08-26 11:27:22,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1312 transitions. [2023-08-26 11:27:22,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:22,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1312 transitions. [2023-08-26 11:27:22,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 218.66666666666666) internal successors, (1312), 6 states have internal predecessors, (1312), 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 11:27:22,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 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 11:27:22,868 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 783.0) internal successors, (5481), 7 states have internal predecessors, (5481), 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 11:27:22,868 INFO L175 Difference]: Start difference. First operand has 103 places, 96 transitions, 452 flow. Second operand 6 states and 1312 transitions. [2023-08-26 11:27:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 108 transitions, 665 flow [2023-08-26 11:27:22,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 108 transitions, 652 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-26 11:27:22,873 INFO L231 Difference]: Finished difference. Result has 104 places, 92 transitions, 432 flow [2023-08-26 11:27:22,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=432, PETRI_PLACES=104, PETRI_TRANSITIONS=92} [2023-08-26 11:27:22,873 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -36 predicate places. [2023-08-26 11:27:22,873 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 92 transitions, 432 flow [2023-08-26 11:27:22,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 206.0) internal successors, (1442), 7 states have internal predecessors, (1442), 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 11:27:22,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:22,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 11:27:22,874 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:22,874 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1027532242, now seen corresponding path program 1 times [2023-08-26 11:27:22,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:22,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358274620] [2023-08-26 11:27:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:40,823 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 11:27:40,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:40,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358274620] [2023-08-26 11:27:40,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358274620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:40,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:40,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 11:27:40,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961515775] [2023-08-26 11:27:40,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:40,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 11:27:40,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:40,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 11:27:40,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-08-26 11:27:40,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 217 out of 783 [2023-08-26 11:27:40,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 92 transitions, 432 flow. Second operand has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 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 11:27:40,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:40,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 217 of 783 [2023-08-26 11:27:40,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:47,701 INFO L124 PetriNetUnfolderBase]: 2467/4249 cut-off events. [2023-08-26 11:27:47,702 INFO L125 PetriNetUnfolderBase]: For 1533/1533 co-relation queries the response was YES. [2023-08-26 11:27:47,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10008 conditions, 4249 events. 2467/4249 cut-off events. For 1533/1533 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 20289 event pairs, 1835 based on Foata normal form. 0/3506 useless extension candidates. Maximal degree in co-relation 9992. Up to 4003 conditions per place. [2023-08-26 11:27:47,716 INFO L140 encePairwiseOnDemand]: 770/783 looper letters, 85 selfloop transitions, 19 changer transitions 1/112 dead transitions. [2023-08-26 11:27:47,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 112 transitions, 714 flow [2023-08-26 11:27:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:27:47,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:27:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2262 transitions. [2023-08-26 11:27:47,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28888888888888886 [2023-08-26 11:27:47,721 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2262 transitions. [2023-08-26 11:27:47,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2262 transitions. [2023-08-26 11:27:47,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:47,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2262 transitions. [2023-08-26 11:27:47,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 226.2) internal successors, (2262), 10 states have internal predecessors, (2262), 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 11:27:47,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 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 11:27:47,731 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 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 11:27:47,731 INFO L175 Difference]: Start difference. First operand has 104 places, 92 transitions, 432 flow. Second operand 10 states and 2262 transitions. [2023-08-26 11:27:47,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 112 transitions, 714 flow [2023-08-26 11:27:47,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 112 transitions, 697 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 11:27:47,737 INFO L231 Difference]: Finished difference. Result has 113 places, 102 transitions, 534 flow [2023-08-26 11:27:47,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=534, PETRI_PLACES=113, PETRI_TRANSITIONS=102} [2023-08-26 11:27:47,737 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -27 predicate places. [2023-08-26 11:27:47,738 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 102 transitions, 534 flow [2023-08-26 11:27:47,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 218.27272727272728) internal successors, (2401), 11 states have internal predecessors, (2401), 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 11:27:47,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:47,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-26 11:27:47,738 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:47,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 233597410, now seen corresponding path program 1 times [2023-08-26 11:27:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:47,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91307854] [2023-08-26 11:27:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:47,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:48,720 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 11:27:48,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:48,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91307854] [2023-08-26 11:27:48,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91307854] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:48,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:48,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:27:48,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708904625] [2023-08-26 11:27:48,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:48,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:27:48,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:27:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:27:48,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 783 [2023-08-26 11:27:48,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 102 transitions, 534 flow. Second operand has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 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 11:27:48,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:48,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 783 [2023-08-26 11:27:48,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:49,646 INFO L124 PetriNetUnfolderBase]: 2636/4569 cut-off events. [2023-08-26 11:27:49,646 INFO L125 PetriNetUnfolderBase]: For 1677/1677 co-relation queries the response was YES. [2023-08-26 11:27:49,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10900 conditions, 4569 events. 2636/4569 cut-off events. For 1677/1677 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 22313 event pairs, 915 based on Foata normal form. 0/3786 useless extension candidates. Maximal degree in co-relation 10880. Up to 3457 conditions per place. [2023-08-26 11:27:49,670 INFO L140 encePairwiseOnDemand]: 772/783 looper letters, 119 selfloop transitions, 24 changer transitions 3/153 dead transitions. [2023-08-26 11:27:49,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 153 transitions, 951 flow [2023-08-26 11:27:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:27:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:27:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1624 transitions. [2023-08-26 11:27:49,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2023-08-26 11:27:49,676 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1624 transitions. [2023-08-26 11:27:49,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1624 transitions. [2023-08-26 11:27:49,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:49,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1624 transitions. [2023-08-26 11:27:49,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 203.0) internal successors, (1624), 8 states have internal predecessors, (1624), 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 11:27:49,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 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 11:27:49,684 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 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 11:27:49,684 INFO L175 Difference]: Start difference. First operand has 113 places, 102 transitions, 534 flow. Second operand 8 states and 1624 transitions. [2023-08-26 11:27:49,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 153 transitions, 951 flow [2023-08-26 11:27:49,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 153 transitions, 932 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-26 11:27:49,690 INFO L231 Difference]: Finished difference. Result has 119 places, 106 transitions, 609 flow [2023-08-26 11:27:49,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=515, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=609, PETRI_PLACES=119, PETRI_TRANSITIONS=106} [2023-08-26 11:27:49,691 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -21 predicate places. [2023-08-26 11:27:49,691 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 106 transitions, 609 flow [2023-08-26 11:27:49,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 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 11:27:49,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:49,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:49,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 11:27:49,692 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:49,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1788808744, now seen corresponding path program 2 times [2023-08-26 11:27:49,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:49,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152231973] [2023-08-26 11:27:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:49,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:50,822 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 11:27:50,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:50,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152231973] [2023-08-26 11:27:50,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152231973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:50,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:50,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:27:50,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197295834] [2023-08-26 11:27:50,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:50,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:27:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:27:50,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:27:50,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 783 [2023-08-26 11:27:50,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 106 transitions, 609 flow. Second operand has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 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 11:27:50,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:50,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 783 [2023-08-26 11:27:50,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:51,808 INFO L124 PetriNetUnfolderBase]: 2686/4641 cut-off events. [2023-08-26 11:27:51,809 INFO L125 PetriNetUnfolderBase]: For 2162/2162 co-relation queries the response was YES. [2023-08-26 11:27:51,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11440 conditions, 4641 events. 2686/4641 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 22798 event pairs, 961 based on Foata normal form. 0/3837 useless extension candidates. Maximal degree in co-relation 11417. Up to 3195 conditions per place. [2023-08-26 11:27:51,842 INFO L140 encePairwiseOnDemand]: 771/783 looper letters, 122 selfloop transitions, 28 changer transitions 3/160 dead transitions. [2023-08-26 11:27:51,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 160 transitions, 1056 flow [2023-08-26 11:27:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:27:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:27:51,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1816 transitions. [2023-08-26 11:27:51,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25769831133815807 [2023-08-26 11:27:51,845 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1816 transitions. [2023-08-26 11:27:51,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1816 transitions. [2023-08-26 11:27:51,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:51,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1816 transitions. [2023-08-26 11:27:51,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 201.77777777777777) internal successors, (1816), 9 states have internal predecessors, (1816), 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 11:27:51,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:27:51,852 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:27:51,852 INFO L175 Difference]: Start difference. First operand has 119 places, 106 transitions, 609 flow. Second operand 9 states and 1816 transitions. [2023-08-26 11:27:51,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 160 transitions, 1056 flow [2023-08-26 11:27:51,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 160 transitions, 1011 flow, removed 8 selfloop flow, removed 5 redundant places. [2023-08-26 11:27:51,860 INFO L231 Difference]: Finished difference. Result has 124 places, 109 transitions, 661 flow [2023-08-26 11:27:51,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=661, PETRI_PLACES=124, PETRI_TRANSITIONS=109} [2023-08-26 11:27:51,861 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -16 predicate places. [2023-08-26 11:27:51,861 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 109 transitions, 661 flow [2023-08-26 11:27:51,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 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 11:27:51,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:51,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:51,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 11:27:51,862 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t1Err40ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:51,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:51,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1788664594, now seen corresponding path program 3 times [2023-08-26 11:27:51,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:51,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806625589] [2023-08-26 11:27:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:51,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:52,738 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 11:27:52,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:52,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806625589] [2023-08-26 11:27:52,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806625589] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:52,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:52,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:27:52,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428590803] [2023-08-26 11:27:52,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:52,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:27:52,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:52,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:27:52,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:27:52,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 783 [2023-08-26 11:27:52,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 109 transitions, 661 flow. Second operand has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 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 11:27:52,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:52,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 783 [2023-08-26 11:27:52,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:53,645 INFO L124 PetriNetUnfolderBase]: 2660/4597 cut-off events. [2023-08-26 11:27:53,645 INFO L125 PetriNetUnfolderBase]: For 2329/2329 co-relation queries the response was YES. [2023-08-26 11:27:53,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11465 conditions, 4597 events. 2660/4597 cut-off events. For 2329/2329 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 22551 event pairs, 975 based on Foata normal form. 0/3808 useless extension candidates. Maximal degree in co-relation 11440. Up to 3195 conditions per place. [2023-08-26 11:27:53,669 INFO L140 encePairwiseOnDemand]: 773/783 looper letters, 114 selfloop transitions, 27 changer transitions 3/151 dead transitions. [2023-08-26 11:27:53,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 151 transitions, 1042 flow [2023-08-26 11:27:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:27:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:27:53,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1618 transitions. [2023-08-26 11:27:53,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25830140485312897 [2023-08-26 11:27:53,672 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1618 transitions. [2023-08-26 11:27:53,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1618 transitions. [2023-08-26 11:27:53,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:53,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1618 transitions. [2023-08-26 11:27:53,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.25) internal successors, (1618), 8 states have internal predecessors, (1618), 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 11:27:53,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 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 11:27:53,680 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 783.0) internal successors, (7047), 9 states have internal predecessors, (7047), 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 11:27:53,681 INFO L175 Difference]: Start difference. First operand has 124 places, 109 transitions, 661 flow. Second operand 8 states and 1618 transitions. [2023-08-26 11:27:53,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 151 transitions, 1042 flow [2023-08-26 11:27:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 151 transitions, 1009 flow, removed 1 selfloop flow, removed 6 redundant places. [2023-08-26 11:27:53,690 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 674 flow [2023-08-26 11:27:53,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=674, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-08-26 11:27:53,690 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -17 predicate places. [2023-08-26 11:27:53,690 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 674 flow [2023-08-26 11:27:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 189.25) internal successors, (2271), 12 states have internal predecessors, (2271), 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 11:27:53,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:53,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:53,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 11:27:53,691 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:53,691 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 974879672, now seen corresponding path program 1 times [2023-08-26 11:27:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:53,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901313203] [2023-08-26 11:27:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:53,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:54,414 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 11:27:54,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:54,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901313203] [2023-08-26 11:27:54,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901313203] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:54,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:54,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-08-26 11:27:54,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022848935] [2023-08-26 11:27:54,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:54,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:27:54,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:54,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:27:54,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:27:54,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 783 [2023-08-26 11:27:54,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 674 flow. Second operand has 12 states, 12 states have (on average 198.41666666666666) internal successors, (2381), 12 states have internal predecessors, (2381), 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 11:27:54,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:54,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 783 [2023-08-26 11:27:54,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:55,397 INFO L124 PetriNetUnfolderBase]: 2828/4872 cut-off events. [2023-08-26 11:27:55,398 INFO L125 PetriNetUnfolderBase]: For 2729/2729 co-relation queries the response was YES. [2023-08-26 11:27:55,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12350 conditions, 4872 events. 2828/4872 cut-off events. For 2729/2729 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 24044 event pairs, 1957 based on Foata normal form. 0/4028 useless extension candidates. Maximal degree in co-relation 12325. Up to 4318 conditions per place. [2023-08-26 11:27:55,418 INFO L140 encePairwiseOnDemand]: 772/783 looper letters, 116 selfloop transitions, 23 changer transitions 3/149 dead transitions. [2023-08-26 11:27:55,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 149 transitions, 1114 flow [2023-08-26 11:27:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 11:27:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 11:27:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2085 transitions. [2023-08-26 11:27:55,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2662835249042146 [2023-08-26 11:27:55,425 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2085 transitions. [2023-08-26 11:27:55,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2085 transitions. [2023-08-26 11:27:55,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:55,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2085 transitions. [2023-08-26 11:27:55,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 208.5) internal successors, (2085), 10 states have internal predecessors, (2085), 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 11:27:55,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 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 11:27:55,434 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 783.0) internal successors, (8613), 11 states have internal predecessors, (8613), 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 11:27:55,434 INFO L175 Difference]: Start difference. First operand has 123 places, 107 transitions, 674 flow. Second operand 10 states and 2085 transitions. [2023-08-26 11:27:55,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 149 transitions, 1114 flow [2023-08-26 11:27:55,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 149 transitions, 1050 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-26 11:27:55,444 INFO L231 Difference]: Finished difference. Result has 129 places, 114 transitions, 754 flow [2023-08-26 11:27:55,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=754, PETRI_PLACES=129, PETRI_TRANSITIONS=114} [2023-08-26 11:27:55,445 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -11 predicate places. [2023-08-26 11:27:55,445 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 754 flow [2023-08-26 11:27:55,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 198.41666666666666) internal successors, (2381), 12 states have internal predecessors, (2381), 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 11:27:55,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:55,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:55,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 11:27:55,446 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:55,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:55,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1247198632, now seen corresponding path program 1 times [2023-08-26 11:27:55,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:55,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760449673] [2023-08-26 11:27:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:56,634 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 11:27:56,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:56,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760449673] [2023-08-26 11:27:56,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760449673] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:56,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:56,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:27:56,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619112283] [2023-08-26 11:27:56,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:56,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:27:56,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:27:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:27:56,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:27:56,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 754 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:27:56,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:56,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:27:56,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:58,197 INFO L124 PetriNetUnfolderBase]: 3023/5217 cut-off events. [2023-08-26 11:27:58,197 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2023-08-26 11:27:58,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 5217 events. 3023/5217 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 26257 event pairs, 1174 based on Foata normal form. 9/4414 useless extension candidates. Maximal degree in co-relation 13280. Up to 4091 conditions per place. [2023-08-26 11:27:58,226 INFO L140 encePairwiseOnDemand]: 771/783 looper letters, 142 selfloop transitions, 34 changer transitions 3/186 dead transitions. [2023-08-26 11:27:58,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 186 transitions, 1341 flow [2023-08-26 11:27:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-26 11:27:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-26 11:27:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2255 transitions. [2023-08-26 11:27:58,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26181353767560667 [2023-08-26 11:27:58,229 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2255 transitions. [2023-08-26 11:27:58,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2255 transitions. [2023-08-26 11:27:58,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:58,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2255 transitions. [2023-08-26 11:27:58,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 205.0) internal successors, (2255), 11 states have internal predecessors, (2255), 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 11:27:58,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 783.0) internal successors, (9396), 12 states have internal predecessors, (9396), 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 11:27:58,237 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 783.0) internal successors, (9396), 12 states have internal predecessors, (9396), 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 11:27:58,237 INFO L175 Difference]: Start difference. First operand has 129 places, 114 transitions, 754 flow. Second operand 11 states and 2255 transitions. [2023-08-26 11:27:58,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 186 transitions, 1341 flow [2023-08-26 11:27:58,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 186 transitions, 1311 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 11:27:58,250 INFO L231 Difference]: Finished difference. Result has 140 places, 121 transitions, 919 flow [2023-08-26 11:27:58,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=919, PETRI_PLACES=140, PETRI_TRANSITIONS=121} [2023-08-26 11:27:58,251 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 0 predicate places. [2023-08-26 11:27:58,251 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 121 transitions, 919 flow [2023-08-26 11:27:58,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:27:58,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:58,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:58,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 11:27:58,251 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:58,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:58,252 INFO L85 PathProgramCache]: Analyzing trace with hash -994358324, now seen corresponding path program 1 times [2023-08-26 11:27:58,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:58,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192652600] [2023-08-26 11:27:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:58,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:27:58,454 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 11:27:58,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:27:58,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192652600] [2023-08-26 11:27:58,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192652600] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:27:58,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:27:58,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 11:27:58,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820810112] [2023-08-26 11:27:58,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:27:58,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 11:27:58,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:27:58,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 11:27:58,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-08-26 11:27:58,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 783 [2023-08-26 11:27:58,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 121 transitions, 919 flow. Second operand has 9 states, 9 states have (on average 225.11111111111111) internal successors, (2026), 9 states have internal predecessors, (2026), 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 11:27:58,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:27:58,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 783 [2023-08-26 11:27:58,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:27:59,109 INFO L124 PetriNetUnfolderBase]: 2818/4876 cut-off events. [2023-08-26 11:27:59,109 INFO L125 PetriNetUnfolderBase]: For 4361/4361 co-relation queries the response was YES. [2023-08-26 11:27:59,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12795 conditions, 4876 events. 2818/4876 cut-off events. For 4361/4361 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 24224 event pairs, 930 based on Foata normal form. 0/4237 useless extension candidates. Maximal degree in co-relation 12760. Up to 2920 conditions per place. [2023-08-26 11:27:59,144 INFO L140 encePairwiseOnDemand]: 775/783 looper letters, 140 selfloop transitions, 14 changer transitions 3/164 dead transitions. [2023-08-26 11:27:59,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 164 transitions, 1302 flow [2023-08-26 11:27:59,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:27:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:27:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1674 transitions. [2023-08-26 11:27:59,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3054187192118227 [2023-08-26 11:27:59,147 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1674 transitions. [2023-08-26 11:27:59,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1674 transitions. [2023-08-26 11:27:59,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:27:59,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1674 transitions. [2023-08-26 11:27:59,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 239.14285714285714) internal successors, (1674), 7 states have internal predecessors, (1674), 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 11:27:59,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 783.0) internal successors, (6264), 8 states have internal predecessors, (6264), 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 11:27:59,152 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 783.0) internal successors, (6264), 8 states have internal predecessors, (6264), 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 11:27:59,152 INFO L175 Difference]: Start difference. First operand has 140 places, 121 transitions, 919 flow. Second operand 7 states and 1674 transitions. [2023-08-26 11:27:59,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 164 transitions, 1302 flow [2023-08-26 11:27:59,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 164 transitions, 1270 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-08-26 11:27:59,172 INFO L231 Difference]: Finished difference. Result has 140 places, 114 transitions, 850 flow [2023-08-26 11:27:59,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=140, PETRI_TRANSITIONS=114} [2023-08-26 11:27:59,172 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 0 predicate places. [2023-08-26 11:27:59,173 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 114 transitions, 850 flow [2023-08-26 11:27:59,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 225.11111111111111) internal successors, (2026), 9 states have internal predecessors, (2026), 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 11:27:59,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:27:59,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:27:59,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 11:27:59,173 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:27:59,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:27:59,174 INFO L85 PathProgramCache]: Analyzing trace with hash 799208026, now seen corresponding path program 2 times [2023-08-26 11:27:59,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:27:59,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547286022] [2023-08-26 11:27:59,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:27:59,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:27:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:00,144 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 11:28:00,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:00,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547286022] [2023-08-26 11:28:00,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547286022] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:00,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:00,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:28:00,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603219026] [2023-08-26 11:28:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:00,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:28:00,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:00,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:28:00,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:28:00,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:28:00,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 114 transitions, 850 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:28:00,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:00,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:28:00,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:01,124 INFO L124 PetriNetUnfolderBase]: 2805/4870 cut-off events. [2023-08-26 11:28:01,124 INFO L125 PetriNetUnfolderBase]: For 4725/4725 co-relation queries the response was YES. [2023-08-26 11:28:01,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12850 conditions, 4870 events. 2805/4870 cut-off events. For 4725/4725 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 24230 event pairs, 913 based on Foata normal form. 9/4256 useless extension candidates. Maximal degree in co-relation 12815. Up to 3204 conditions per place. [2023-08-26 11:28:01,145 INFO L140 encePairwiseOnDemand]: 773/783 looper letters, 123 selfloop transitions, 33 changer transitions 3/166 dead transitions. [2023-08-26 11:28:01,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 166 transitions, 1297 flow [2023-08-26 11:28:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:28:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:28:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1849 transitions. [2023-08-26 11:28:01,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2623811551014616 [2023-08-26 11:28:01,149 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1849 transitions. [2023-08-26 11:28:01,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1849 transitions. [2023-08-26 11:28:01,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:01,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1849 transitions. [2023-08-26 11:28:01,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.44444444444446) internal successors, (1849), 9 states have internal predecessors, (1849), 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 11:28:01,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:28:01,158 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:28:01,158 INFO L175 Difference]: Start difference. First operand has 140 places, 114 transitions, 850 flow. Second operand 9 states and 1849 transitions. [2023-08-26 11:28:01,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 166 transitions, 1297 flow [2023-08-26 11:28:01,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 166 transitions, 1270 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 11:28:01,174 INFO L231 Difference]: Finished difference. Result has 145 places, 115 transitions, 921 flow [2023-08-26 11:28:01,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=921, PETRI_PLACES=145, PETRI_TRANSITIONS=115} [2023-08-26 11:28:01,175 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2023-08-26 11:28:01,175 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 115 transitions, 921 flow [2023-08-26 11:28:01,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:28:01,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:01,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:01,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-08-26 11:28:01,176 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:01,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:01,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1559139422, now seen corresponding path program 3 times [2023-08-26 11:28:01,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:01,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603238998] [2023-08-26 11:28:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:01,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:01,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:02,007 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 11:28:02,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:02,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603238998] [2023-08-26 11:28:02,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603238998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:02,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:02,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:28:02,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23037936] [2023-08-26 11:28:02,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:02,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:28:02,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:02,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:28:02,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:28:02,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:28:02,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 115 transitions, 921 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:28:02,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:02,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:28:02,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:03,022 INFO L124 PetriNetUnfolderBase]: 2831/4914 cut-off events. [2023-08-26 11:28:03,022 INFO L125 PetriNetUnfolderBase]: For 5654/5654 co-relation queries the response was YES. [2023-08-26 11:28:03,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13167 conditions, 4914 events. 2831/4914 cut-off events. For 5654/5654 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 24551 event pairs, 834 based on Foata normal form. 9/4296 useless extension candidates. Maximal degree in co-relation 13131. Up to 2923 conditions per place. [2023-08-26 11:28:03,045 INFO L140 encePairwiseOnDemand]: 773/783 looper letters, 123 selfloop transitions, 34 changer transitions 3/167 dead transitions. [2023-08-26 11:28:03,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 167 transitions, 1371 flow [2023-08-26 11:28:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:28:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:28:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1848 transitions. [2023-08-26 11:28:03,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2622392507449979 [2023-08-26 11:28:03,048 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1848 transitions. [2023-08-26 11:28:03,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1848 transitions. [2023-08-26 11:28:03,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:03,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1848 transitions. [2023-08-26 11:28:03,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.33333333333334) internal successors, (1848), 9 states have internal predecessors, (1848), 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 11:28:03,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:28:03,055 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:28:03,056 INFO L175 Difference]: Start difference. First operand has 145 places, 115 transitions, 921 flow. Second operand 9 states and 1848 transitions. [2023-08-26 11:28:03,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 167 transitions, 1371 flow [2023-08-26 11:28:03,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 167 transitions, 1308 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-26 11:28:03,074 INFO L231 Difference]: Finished difference. Result has 148 places, 116 transitions, 946 flow [2023-08-26 11:28:03,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=946, PETRI_PLACES=148, PETRI_TRANSITIONS=116} [2023-08-26 11:28:03,074 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 8 predicate places. [2023-08-26 11:28:03,074 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 116 transitions, 946 flow [2023-08-26 11:28:03,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:28:03,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:03,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:03,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 11:28:03,075 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t1Err25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:03,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:03,081 INFO L85 PathProgramCache]: Analyzing trace with hash 156499844, now seen corresponding path program 4 times [2023-08-26 11:28:03,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:03,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776660258] [2023-08-26 11:28:03,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:03,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:03,927 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 11:28:03,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:03,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776660258] [2023-08-26 11:28:03,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776660258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:03,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:03,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 11:28:03,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992554942] [2023-08-26 11:28:03,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:03,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 11:28:03,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:03,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 11:28:03,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-08-26 11:28:03,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:28:03,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 116 transitions, 946 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:28:03,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:03,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:28:03,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:04,970 INFO L124 PetriNetUnfolderBase]: 2818/4892 cut-off events. [2023-08-26 11:28:04,970 INFO L125 PetriNetUnfolderBase]: For 6202/6202 co-relation queries the response was YES. [2023-08-26 11:28:04,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13181 conditions, 4892 events. 2818/4892 cut-off events. For 6202/6202 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 24401 event pairs, 832 based on Foata normal form. 9/4278 useless extension candidates. Maximal degree in co-relation 13144. Up to 2923 conditions per place. [2023-08-26 11:28:04,995 INFO L140 encePairwiseOnDemand]: 774/783 looper letters, 122 selfloop transitions, 33 changer transitions 3/165 dead transitions. [2023-08-26 11:28:04,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 165 transitions, 1376 flow [2023-08-26 11:28:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:28:04,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:28:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1845 transitions. [2023-08-26 11:28:04,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26181353767560667 [2023-08-26 11:28:04,999 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1845 transitions. [2023-08-26 11:28:04,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1845 transitions. [2023-08-26 11:28:05,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:05,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1845 transitions. [2023-08-26 11:28:05,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 205.0) internal successors, (1845), 9 states have internal predecessors, (1845), 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 11:28:05,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:28:05,007 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 783.0) internal successors, (7830), 10 states have internal predecessors, (7830), 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 11:28:05,007 INFO L175 Difference]: Start difference. First operand has 148 places, 116 transitions, 946 flow. Second operand 9 states and 1845 transitions. [2023-08-26 11:28:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 165 transitions, 1376 flow [2023-08-26 11:28:05,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 165 transitions, 1319 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-26 11:28:05,029 INFO L231 Difference]: Finished difference. Result has 150 places, 116 transitions, 967 flow [2023-08-26 11:28:05,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=967, PETRI_PLACES=150, PETRI_TRANSITIONS=116} [2023-08-26 11:28:05,029 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 10 predicate places. [2023-08-26 11:28:05,029 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 116 transitions, 967 flow [2023-08-26 11:28:05,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 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 11:28:05,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:05,030 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, 1] [2023-08-26 11:28:05,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 11:28:05,030 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:05,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:05,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2129887938, now seen corresponding path program 1 times [2023-08-26 11:28:05,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:05,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223797663] [2023-08-26 11:28:05,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:05,195 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 11:28:05,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:05,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223797663] [2023-08-26 11:28:05,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223797663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:05,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:05,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:28:05,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570970347] [2023-08-26 11:28:05,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:05,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:28:05,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:05,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:28:05,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:28:05,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 783 [2023-08-26 11:28:05,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 116 transitions, 967 flow. Second operand has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 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 11:28:05,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:05,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 783 [2023-08-26 11:28:05,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:05,778 INFO L124 PetriNetUnfolderBase]: 3398/5866 cut-off events. [2023-08-26 11:28:05,778 INFO L125 PetriNetUnfolderBase]: For 8865/8865 co-relation queries the response was YES. [2023-08-26 11:28:05,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16027 conditions, 5866 events. 3398/5866 cut-off events. For 8865/8865 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 30903 event pairs, 1584 based on Foata normal form. 20/5157 useless extension candidates. Maximal degree in co-relation 15990. Up to 4663 conditions per place. [2023-08-26 11:28:05,820 INFO L140 encePairwiseOnDemand]: 778/783 looper letters, 158 selfloop transitions, 3 changer transitions 0/168 dead transitions. [2023-08-26 11:28:05,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 168 transitions, 1603 flow [2023-08-26 11:28:05,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:28:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:28:05,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1075 transitions. [2023-08-26 11:28:05,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34323116219667943 [2023-08-26 11:28:05,822 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1075 transitions. [2023-08-26 11:28:05,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1075 transitions. [2023-08-26 11:28:05,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:05,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1075 transitions. [2023-08-26 11:28:05,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 268.75) internal successors, (1075), 4 states have internal predecessors, (1075), 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 11:28:05,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 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 11:28:05,825 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 783.0) internal successors, (3915), 5 states have internal predecessors, (3915), 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 11:28:05,825 INFO L175 Difference]: Start difference. First operand has 150 places, 116 transitions, 967 flow. Second operand 4 states and 1075 transitions. [2023-08-26 11:28:05,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 168 transitions, 1603 flow [2023-08-26 11:28:05,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 168 transitions, 1495 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-26 11:28:05,849 INFO L231 Difference]: Finished difference. Result has 145 places, 117 transitions, 905 flow [2023-08-26 11:28:05,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=905, PETRI_PLACES=145, PETRI_TRANSITIONS=117} [2023-08-26 11:28:05,850 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2023-08-26 11:28:05,850 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 117 transitions, 905 flow [2023-08-26 11:28:05,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 249.75) internal successors, (999), 4 states have internal predecessors, (999), 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 11:28:05,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:05,850 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 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 11:28:05,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 11:28:05,850 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting t1Err39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:05,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:05,851 INFO L85 PathProgramCache]: Analyzing trace with hash -913856181, now seen corresponding path program 1 times [2023-08-26 11:28:05,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:05,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274165270] [2023-08-26 11:28:05,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:05,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:28:05,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:05,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274165270] [2023-08-26 11:28:05,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274165270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:05,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:28:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594810607] [2023-08-26 11:28:05,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:28:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:05,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:28:05,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:28:05,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 783 [2023-08-26 11:28:05,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 117 transitions, 905 flow. Second operand has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 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 11:28:05,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:05,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 783 [2023-08-26 11:28:05,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:06,259 INFO L124 PetriNetUnfolderBase]: 1959/3534 cut-off events. [2023-08-26 11:28:06,259 INFO L125 PetriNetUnfolderBase]: For 5940/5947 co-relation queries the response was YES. [2023-08-26 11:28:06,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9739 conditions, 3534 events. 1959/3534 cut-off events. For 5940/5947 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 17287 event pairs, 1016 based on Foata normal form. 96/3283 useless extension candidates. Maximal degree in co-relation 9702. Up to 1949 conditions per place. [2023-08-26 11:28:06,275 INFO L140 encePairwiseOnDemand]: 779/783 looper letters, 106 selfloop transitions, 3 changer transitions 4/128 dead transitions. [2023-08-26 11:28:06,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 128 transitions, 1165 flow [2023-08-26 11:28:06,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:28:06,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:28:06,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1067 transitions. [2023-08-26 11:28:06,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45423584504044273 [2023-08-26 11:28:06,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1067 transitions. [2023-08-26 11:28:06,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1067 transitions. [2023-08-26 11:28:06,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:06,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1067 transitions. [2023-08-26 11:28:06,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 355.6666666666667) internal successors, (1067), 3 states have internal predecessors, (1067), 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 11:28:06,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:28:06,280 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:28:06,280 INFO L175 Difference]: Start difference. First operand has 145 places, 117 transitions, 905 flow. Second operand 3 states and 1067 transitions. [2023-08-26 11:28:06,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 128 transitions, 1165 flow [2023-08-26 11:28:06,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 128 transitions, 1151 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 11:28:06,291 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 894 flow [2023-08-26 11:28:06,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=894, PETRI_PLACES=146, PETRI_TRANSITIONS=113} [2023-08-26 11:28:06,291 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 6 predicate places. [2023-08-26 11:28:06,291 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 894 flow [2023-08-26 11:28:06,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.0) internal successors, (1020), 3 states have internal predecessors, (1020), 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 11:28:06,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:06,292 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:06,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 11:28:06,292 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:06,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2096569285, now seen corresponding path program 1 times [2023-08-26 11:28:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:06,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481298720] [2023-08-26 11:28:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:06,360 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 11:28:06,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:06,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481298720] [2023-08-26 11:28:06,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481298720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:06,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:06,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:28:06,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898817170] [2023-08-26 11:28:06,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:06,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:28:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:06,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:28:06,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:28:06,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 325 out of 783 [2023-08-26 11:28:06,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 113 transitions, 894 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 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 11:28:06,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:06,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 325 of 783 [2023-08-26 11:28:06,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:06,676 INFO L124 PetriNetUnfolderBase]: 1716/3192 cut-off events. [2023-08-26 11:28:06,676 INFO L125 PetriNetUnfolderBase]: For 4584/4589 co-relation queries the response was YES. [2023-08-26 11:28:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9054 conditions, 3192 events. 1716/3192 cut-off events. For 4584/4589 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 15669 event pairs, 569 based on Foata normal form. 59/3122 useless extension candidates. Maximal degree in co-relation 9016. Up to 2195 conditions per place. [2023-08-26 11:28:06,695 INFO L140 encePairwiseOnDemand]: 777/783 looper letters, 104 selfloop transitions, 6 changer transitions 1/126 dead transitions. [2023-08-26 11:28:06,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 126 transitions, 1173 flow [2023-08-26 11:28:06,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:28:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:28:06,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1044 transitions. [2023-08-26 11:28:06,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-26 11:28:06,698 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1044 transitions. [2023-08-26 11:28:06,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1044 transitions. [2023-08-26 11:28:06,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:06,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1044 transitions. [2023-08-26 11:28:06,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 348.0) internal successors, (1044), 3 states have internal predecessors, (1044), 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 11:28:06,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:28:06,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 783.0) internal successors, (3132), 4 states have internal predecessors, (3132), 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 11:28:06,701 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 894 flow. Second operand 3 states and 1044 transitions. [2023-08-26 11:28:06,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 126 transitions, 1173 flow [2023-08-26 11:28:06,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 126 transitions, 1167 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:28:06,717 INFO L231 Difference]: Finished difference. Result has 145 places, 112 transitions, 896 flow [2023-08-26 11:28:06,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=896, PETRI_PLACES=145, PETRI_TRANSITIONS=112} [2023-08-26 11:28:06,718 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2023-08-26 11:28:06,718 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 112 transitions, 896 flow [2023-08-26 11:28:06,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 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 11:28:06,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:06,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:06,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 11:28:06,718 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:06,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:06,719 INFO L85 PathProgramCache]: Analyzing trace with hash -114335093, now seen corresponding path program 1 times [2023-08-26 11:28:06,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:06,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195759985] [2023-08-26 11:28:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:06,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:08,214 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 11:28:08,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:08,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195759985] [2023-08-26 11:28:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195759985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:08,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:08,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 11:28:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619893572] [2023-08-26 11:28:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 11:28:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 11:28:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-08-26 11:28:08,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:28:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 112 transitions, 896 flow. Second operand has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 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 11:28:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:28:08,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:09,879 INFO L124 PetriNetUnfolderBase]: 1261/2364 cut-off events. [2023-08-26 11:28:09,880 INFO L125 PetriNetUnfolderBase]: For 4462/4464 co-relation queries the response was YES. [2023-08-26 11:28:09,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7301 conditions, 2364 events. 1261/2364 cut-off events. For 4462/4464 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 10513 event pairs, 672 based on Foata normal form. 10/2312 useless extension candidates. Maximal degree in co-relation 7263. Up to 1551 conditions per place. [2023-08-26 11:28:09,893 INFO L140 encePairwiseOnDemand]: 769/783 looper letters, 149 selfloop transitions, 40 changer transitions 17/212 dead transitions. [2023-08-26 11:28:09,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 212 transitions, 1619 flow [2023-08-26 11:28:09,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 11:28:09,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 11:28:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3824 transitions. [2023-08-26 11:28:09,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25704107010822075 [2023-08-26 11:28:09,898 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3824 transitions. [2023-08-26 11:28:09,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3824 transitions. [2023-08-26 11:28:09,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:09,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3824 transitions. [2023-08-26 11:28:09,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 201.26315789473685) internal successors, (3824), 19 states have internal predecessors, (3824), 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 11:28:09,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 783.0) internal successors, (15660), 20 states have internal predecessors, (15660), 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 11:28:09,910 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 783.0) internal successors, (15660), 20 states have internal predecessors, (15660), 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 11:28:09,910 INFO L175 Difference]: Start difference. First operand has 145 places, 112 transitions, 896 flow. Second operand 19 states and 3824 transitions. [2023-08-26 11:28:09,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 212 transitions, 1619 flow [2023-08-26 11:28:09,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 212 transitions, 1601 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-26 11:28:09,923 INFO L231 Difference]: Finished difference. Result has 165 places, 122 transitions, 1049 flow [2023-08-26 11:28:09,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1049, PETRI_PLACES=165, PETRI_TRANSITIONS=122} [2023-08-26 11:28:09,924 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 25 predicate places. [2023-08-26 11:28:09,924 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 122 transitions, 1049 flow [2023-08-26 11:28:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 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 11:28:09,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:09,925 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:09,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-08-26 11:28:09,925 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:09,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:09,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1068339291, now seen corresponding path program 2 times [2023-08-26 11:28:09,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:09,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077615071] [2023-08-26 11:28:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:09,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:10,964 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 11:28:10,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:10,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077615071] [2023-08-26 11:28:10,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077615071] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:10,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:10,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-08-26 11:28:10,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560995441] [2023-08-26 11:28:10,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:10,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 11:28:10,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:10,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 11:28:10,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-26 11:28:10,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:28:10,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 122 transitions, 1049 flow. Second operand has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 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 11:28:10,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:10,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:28:10,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:11,770 INFO L124 PetriNetUnfolderBase]: 1316/2464 cut-off events. [2023-08-26 11:28:11,770 INFO L125 PetriNetUnfolderBase]: For 4944/4946 co-relation queries the response was YES. [2023-08-26 11:28:11,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7783 conditions, 2464 events. 1316/2464 cut-off events. For 4944/4946 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 11054 event pairs, 544 based on Foata normal form. 9/2411 useless extension candidates. Maximal degree in co-relation 7741. Up to 1204 conditions per place. [2023-08-26 11:28:11,784 INFO L140 encePairwiseOnDemand]: 770/783 looper letters, 123 selfloop transitions, 44 changer transitions 10/183 dead transitions. [2023-08-26 11:28:11,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 183 transitions, 1568 flow [2023-08-26 11:28:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 11:28:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 11:28:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2437 transitions. [2023-08-26 11:28:11,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25936568752660705 [2023-08-26 11:28:11,786 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2437 transitions. [2023-08-26 11:28:11,786 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2437 transitions. [2023-08-26 11:28:11,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:11,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2437 transitions. [2023-08-26 11:28:11,789 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 203.08333333333334) internal successors, (2437), 12 states have internal predecessors, (2437), 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 11:28:11,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 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 11:28:11,796 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 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 11:28:11,796 INFO L175 Difference]: Start difference. First operand has 165 places, 122 transitions, 1049 flow. Second operand 12 states and 2437 transitions. [2023-08-26 11:28:11,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 183 transitions, 1568 flow [2023-08-26 11:28:11,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 183 transitions, 1476 flow, removed 12 selfloop flow, removed 11 redundant places. [2023-08-26 11:28:11,814 INFO L231 Difference]: Finished difference. Result has 169 places, 126 transitions, 1106 flow [2023-08-26 11:28:11,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1106, PETRI_PLACES=169, PETRI_TRANSITIONS=126} [2023-08-26 11:28:11,815 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 29 predicate places. [2023-08-26 11:28:11,815 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 126 transitions, 1106 flow [2023-08-26 11:28:11,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 193.93333333333334) internal successors, (2909), 15 states have internal predecessors, (2909), 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 11:28:11,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:11,816 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:11,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-08-26 11:28:11,816 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:11,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1548208109, now seen corresponding path program 3 times [2023-08-26 11:28:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:11,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230360585] [2023-08-26 11:28:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:11,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:12,910 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 11:28:12,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:12,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230360585] [2023-08-26 11:28:12,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230360585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:12,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:12,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-26 11:28:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971246894] [2023-08-26 11:28:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:12,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:28:12,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:28:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:28:12,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:28:12,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 126 transitions, 1106 flow. Second operand has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 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 11:28:12,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:12,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:28:12,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:13,825 INFO L124 PetriNetUnfolderBase]: 1579/2976 cut-off events. [2023-08-26 11:28:13,825 INFO L125 PetriNetUnfolderBase]: For 5730/5732 co-relation queries the response was YES. [2023-08-26 11:28:13,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9345 conditions, 2976 events. 1579/2976 cut-off events. For 5730/5732 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 14276 event pairs, 439 based on Foata normal form. 9/2892 useless extension candidates. Maximal degree in co-relation 9299. Up to 970 conditions per place. [2023-08-26 11:28:13,842 INFO L140 encePairwiseOnDemand]: 767/783 looper letters, 150 selfloop transitions, 56 changer transitions 14/226 dead transitions. [2023-08-26 11:28:13,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 226 transitions, 1850 flow [2023-08-26 11:28:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 11:28:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 11:28:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 3248 transitions. [2023-08-26 11:28:13,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25925925925925924 [2023-08-26 11:28:13,845 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 3248 transitions. [2023-08-26 11:28:13,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 3248 transitions. [2023-08-26 11:28:13,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:13,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 3248 transitions. [2023-08-26 11:28:13,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 203.0) internal successors, (3248), 16 states have internal predecessors, (3248), 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 11:28:13,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 783.0) internal successors, (13311), 17 states have internal predecessors, (13311), 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 11:28:13,854 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 783.0) internal successors, (13311), 17 states have internal predecessors, (13311), 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 11:28:13,854 INFO L175 Difference]: Start difference. First operand has 169 places, 126 transitions, 1106 flow. Second operand 16 states and 3248 transitions. [2023-08-26 11:28:13,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 226 transitions, 1850 flow [2023-08-26 11:28:13,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 226 transitions, 1764 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-08-26 11:28:13,868 INFO L231 Difference]: Finished difference. Result has 181 places, 132 transitions, 1230 flow [2023-08-26 11:28:13,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1230, PETRI_PLACES=181, PETRI_TRANSITIONS=132} [2023-08-26 11:28:13,869 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 41 predicate places. [2023-08-26 11:28:13,869 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 132 transitions, 1230 flow [2023-08-26 11:28:13,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 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 11:28:13,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:13,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:13,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 11:28:13,869 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:13,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:13,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1354022497, now seen corresponding path program 4 times [2023-08-26 11:28:13,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:13,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550986005] [2023-08-26 11:28:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:13,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:28:14,761 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 11:28:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:28:14,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550986005] [2023-08-26 11:28:14,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550986005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:28:14,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:28:14,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-08-26 11:28:14,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549689572] [2023-08-26 11:28:14,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:28:14,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:28:14,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:28:14,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:28:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:28:14,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 783 [2023-08-26 11:28:14,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 132 transitions, 1230 flow. Second operand has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 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 11:28:14,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:28:14,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 783 [2023-08-26 11:28:14,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:28:15,563 INFO L124 PetriNetUnfolderBase]: 1361/2565 cut-off events. [2023-08-26 11:28:15,563 INFO L125 PetriNetUnfolderBase]: For 6479/6479 co-relation queries the response was YES. [2023-08-26 11:28:15,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8703 conditions, 2565 events. 1361/2565 cut-off events. For 6479/6479 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 11721 event pairs, 276 based on Foata normal form. 14/2529 useless extension candidates. Maximal degree in co-relation 8653. Up to 847 conditions per place. [2023-08-26 11:28:15,575 INFO L140 encePairwiseOnDemand]: 771/783 looper letters, 128 selfloop transitions, 46 changer transitions 10/190 dead transitions. [2023-08-26 11:28:15,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 190 transitions, 1757 flow [2023-08-26 11:28:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 11:28:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 11:28:15,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2433 transitions. [2023-08-26 11:28:15,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25893997445721584 [2023-08-26 11:28:15,578 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2433 transitions. [2023-08-26 11:28:15,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2433 transitions. [2023-08-26 11:28:15,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:28:15,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2433 transitions. [2023-08-26 11:28:15,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 202.75) internal successors, (2433), 12 states have internal predecessors, (2433), 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 11:28:15,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 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 11:28:15,588 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 783.0) internal successors, (10179), 13 states have internal predecessors, (10179), 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 11:28:15,588 INFO L175 Difference]: Start difference. First operand has 181 places, 132 transitions, 1230 flow. Second operand 12 states and 2433 transitions. [2023-08-26 11:28:15,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 190 transitions, 1757 flow [2023-08-26 11:28:15,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 190 transitions, 1665 flow, removed 7 selfloop flow, removed 11 redundant places. [2023-08-26 11:28:15,611 INFO L231 Difference]: Finished difference. Result has 184 places, 134 transitions, 1282 flow [2023-08-26 11:28:15,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=783, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1282, PETRI_PLACES=184, PETRI_TRANSITIONS=134} [2023-08-26 11:28:15,612 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 44 predicate places. [2023-08-26 11:28:15,612 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 134 transitions, 1282 flow [2023-08-26 11:28:15,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 193.8125) internal successors, (3101), 16 states have internal predecessors, (3101), 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 11:28:15,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:28:15,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:28:15,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 11:28:15,613 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting t2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 138 more)] === [2023-08-26 11:28:15,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:28:15,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1386428107, now seen corresponding path program 1 times [2023-08-26 11:28:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:28:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556483459] [2023-08-26 11:28:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:28:15,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:28:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2023-08-26 11:40:04,096 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 11:40:04,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 11:40:04,102 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Timeout exceeded at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator$ProofTreeWalker.walk(Interpolator.java:152) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.interpolate(Interpolator.java:260) at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:237) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:848) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:776) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:352) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:283) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:164) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:327) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:229) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:210) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-08-26 11:40:04,105 INFO L158 Benchmark]: Toolchain (without parser) took 794521.25ms. Allocated memory was 375.4MB in the beginning and 7.0GB in the end (delta: 6.7GB). Free memory was 349.7MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. [2023-08-26 11:40:04,105 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 375.4MB. Free memory was 351.4MB in the beginning and 351.2MB in the end (delta: 169.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 11:40:04,106 INFO L158 Benchmark]: CACSL2BoogieTranslator took 665.37ms. Allocated memory is still 375.4MB. Free memory was 349.2MB in the beginning and 319.6MB in the end (delta: 29.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 11:40:04,106 INFO L158 Benchmark]: Boogie Procedure Inliner took 78.16ms. Allocated memory is still 375.4MB. Free memory was 319.6MB in the beginning and 316.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 11:40:04,106 INFO L158 Benchmark]: Boogie Preprocessor took 59.83ms. Allocated memory is still 375.4MB. Free memory was 316.4MB in the beginning and 313.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:40:04,106 INFO L158 Benchmark]: RCFGBuilder took 862.21ms. Allocated memory is still 375.4MB. Free memory was 313.8MB in the beginning and 333.0MB in the end (delta: -19.3MB). Peak memory consumption was 23.2MB. Max. memory is 16.0GB. [2023-08-26 11:40:04,107 INFO L158 Benchmark]: TraceAbstraction took 792850.39ms. Allocated memory was 375.4MB in the beginning and 7.0GB in the end (delta: 6.7GB). Free memory was 333.0MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. [2023-08-26 11:40:04,108 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 375.4MB. Free memory was 351.4MB in the beginning and 351.2MB in the end (delta: 169.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 665.37ms. Allocated memory is still 375.4MB. Free memory was 349.2MB in the beginning and 319.6MB in the end (delta: 29.6MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 78.16ms. Allocated memory is still 375.4MB. Free memory was 319.6MB in the beginning and 316.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 59.83ms. Allocated memory is still 375.4MB. Free memory was 316.4MB in the beginning and 313.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 862.21ms. Allocated memory is still 375.4MB. Free memory was 313.8MB in the beginning and 333.0MB in the end (delta: -19.3MB). Peak memory consumption was 23.2MB. Max. memory is 16.0GB. * TraceAbstraction took 792850.39ms. Allocated memory was 375.4MB in the beginning and 7.0GB in the end (delta: 6.7GB). Free memory was 333.0MB in the beginning and 1.6GB in the end (delta: -1.2GB). Peak memory consumption was 6.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 258]: Unsoundness Warning unspecified type, defaulting to int C: short [258] - GenericResultAtLocation [Line: 258]: Unsoundness Warning unspecified type, defaulting to int C: short [258] - GenericResultAtLocation [Line: 750]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [750] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 14.0s, 332 PlacesBefore, 140 PlacesAfterwards, 343 TransitionsBefore, 144 TransitionsAfterwards, 30836 CoEnabledTransitionPairs, 8 FixpointIterations, 109 TrivialSequentialCompositions, 283 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 24 ConcurrentYvCompositions, 7 ChoiceCompositions, 429 TotalNumberOfCompositions, 108870 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 46921, independent: 45684, independent conditional: 0, independent unconditional: 45684, dependent: 1237, dependent conditional: 0, dependent unconditional: 1237, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 19717, independent: 19550, independent conditional: 0, independent unconditional: 19550, dependent: 167, dependent conditional: 0, dependent unconditional: 167, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 46921, independent: 26134, independent conditional: 0, independent unconditional: 26134, dependent: 1070, dependent conditional: 0, dependent unconditional: 1070, unknown: 19717, unknown conditional: 0, unknown unconditional: 19717] , Statistics on independence cache: Total cache size (in pairs): 1187, Positive cache size: 1095, Positive conditional cache size: 0, Positive unconditional cache size: 1095, Negative cache size: 92, Negative conditional cache size: 0, Negative unconditional cache size: 92, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: Timeout exceeded de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Timeout exceeded: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.walkResolutionNode(Interpolator.java:275) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown