/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 16:34:01,920 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 16:34:01,999 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 16:34:02,003 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 16:34:02,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 16:34:02,032 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 16:34:02,033 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 16:34:02,034 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 16:34:02,034 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 16:34:02,038 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 16:34:02,038 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 16:34:02,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 16:34:02,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 16:34:02,040 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 16:34:02,040 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 16:34:02,040 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 16:34:02,041 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 16:34:02,041 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 16:34:02,041 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 16:34:02,041 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 16:34:02,042 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 16:34:02,042 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 16:34:02,043 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 16:34:02,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 16:34:02,043 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 16:34:02,044 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 16:34:02,044 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 16:34:02,044 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:34:02,044 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 16:34:02,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 16:34:02,046 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 16:34:02,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 16:34:02,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 16:34:02,046 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 16:34:02,046 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 16:34:02,047 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 16:34:02,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 16:34:02,385 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 16:34:02,387 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 16:34:02,388 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 16:34:02,388 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 16:34:02,389 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/mult-dist.wvr.c [2023-08-26 16:34:03,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 16:34:03,728 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 16:34:03,729 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/mult-dist.wvr.c [2023-08-26 16:34:03,736 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0345b7391/756f2f4a0d08494a8f68f19da1a73917/FLAG6fffaa5e4 [2023-08-26 16:34:03,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0345b7391/756f2f4a0d08494a8f68f19da1a73917 [2023-08-26 16:34:03,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 16:34:03,755 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 16:34:03,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 16:34:03,759 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 16:34:03,761 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 16:34:03,762 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:34:03" (1/1) ... [2023-08-26 16:34:03,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1eab3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:03, skipping insertion in model container [2023-08-26 16:34:03,763 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:34:03" (1/1) ... [2023-08-26 16:34:03,782 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 16:34:03,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:34:03,960 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 16:34:03,996 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 16:34:04,008 INFO L206 MainTranslator]: Completed translation [2023-08-26 16:34:04,008 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04 WrapperNode [2023-08-26 16:34:04,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 16:34:04,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 16:34:04,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 16:34:04,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 16:34:04,015 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,050 INFO L138 Inliner]: procedures = 22, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 75 [2023-08-26 16:34:04,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 16:34:04,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 16:34:04,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 16:34:04,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 16:34:04,058 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,064 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,064 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,083 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 16:34:04,084 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 16:34:04,084 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 16:34:04,084 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 16:34:04,085 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (1/1) ... [2023-08-26 16:34:04,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 16:34:04,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:04,114 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 16:34:04,136 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 16:34:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 16:34:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 16:34:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 16:34:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 16:34:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 16:34:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 16:34:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 16:34:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 16:34:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 16:34:04,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 16:34:04,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 16:34:04,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 16:34:04,151 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 16:34:04,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 16:34:04,152 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 16:34:04,227 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 16:34:04,228 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 16:34:04,455 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 16:34:04,461 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 16:34:04,461 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 16:34:04,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:34:04 BoogieIcfgContainer [2023-08-26 16:34:04,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 16:34:04,464 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 16:34:04,464 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 16:34:04,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 16:34:04,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:34:03" (1/3) ... [2023-08-26 16:34:04,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebe5758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:34:04, skipping insertion in model container [2023-08-26 16:34:04,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:34:04" (2/3) ... [2023-08-26 16:34:04,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ebe5758 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:34:04, skipping insertion in model container [2023-08-26 16:34:04,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:34:04" (3/3) ... [2023-08-26 16:34:04,469 INFO L112 eAbstractionObserver]: Analyzing ICFG mult-dist.wvr.c [2023-08-26 16:34:04,483 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 16:34:04,483 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 16:34:04,483 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 16:34:04,580 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 16:34:04,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 121 transitions, 266 flow [2023-08-26 16:34:04,690 INFO L124 PetriNetUnfolderBase]: 7/118 cut-off events. [2023-08-26 16:34:04,690 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:04,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 118 events. 7/118 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 123 event pairs, 0 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-08-26 16:34:04,695 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 121 transitions, 266 flow [2023-08-26 16:34:04,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 107 transitions, 232 flow [2023-08-26 16:34:04,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 16:34:04,715 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 107 transitions, 232 flow [2023-08-26 16:34:04,718 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 107 transitions, 232 flow [2023-08-26 16:34:04,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 107 transitions, 232 flow [2023-08-26 16:34:04,760 INFO L124 PetriNetUnfolderBase]: 7/107 cut-off events. [2023-08-26 16:34:04,760 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:04,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120 conditions, 107 events. 7/107 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 122 event pairs, 0 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2023-08-26 16:34:04,764 INFO L119 LiptonReduction]: Number of co-enabled transitions 1914 [2023-08-26 16:34:08,094 INFO L134 LiptonReduction]: Checked pairs total: 1930 [2023-08-26 16:34:08,094 INFO L136 LiptonReduction]: Total number of compositions: 107 [2023-08-26 16:34:08,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 16:34:08,117 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;@70f2ee7c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 16:34:08,117 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 16:34:08,118 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 16:34:08,118 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 16:34:08,118 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 16:34:08,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:08,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 16:34:08,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:08,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:08,122 INFO L85 PathProgramCache]: Analyzing trace with hash 449, now seen corresponding path program 1 times [2023-08-26 16:34:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:08,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746744252] [2023-08-26 16:34:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:08,194 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 16:34:08,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:08,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746744252] [2023-08-26 16:34:08,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746744252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:08,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:08,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 16:34:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859393787] [2023-08-26 16:34:08,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:08,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 16:34:08,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:08,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 16:34:08,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 16:34:08,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 228 [2023-08-26 16:34:08,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:08,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 228 [2023-08-26 16:34:08,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:08,367 INFO L124 PetriNetUnfolderBase]: 578/785 cut-off events. [2023-08-26 16:34:08,367 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-26 16:34:08,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 785 events. 578/785 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2769 event pairs, 263 based on Foata normal form. 0/381 useless extension candidates. Maximal degree in co-relation 1257. Up to 777 conditions per place. [2023-08-26 16:34:08,375 INFO L140 encePairwiseOnDemand]: 226/228 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-26 16:34:08,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 32 transitions, 140 flow [2023-08-26 16:34:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 16:34:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 16:34:08,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 251 transitions. [2023-08-26 16:34:08,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5504385964912281 [2023-08-26 16:34:08,391 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 251 transitions. [2023-08-26 16:34:08,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 251 transitions. [2023-08-26 16:34:08,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:08,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 251 transitions. [2023-08-26 16:34:08,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 125.5) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,403 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,404 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 86 flow. Second operand 2 states and 251 transitions. [2023-08-26 16:34:08,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 32 transitions, 140 flow [2023-08-26 16:34:08,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 16:34:08,409 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 70 flow [2023-08-26 16:34:08,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-26 16:34:08,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-26 16:34:08,413 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 70 flow [2023-08-26 16:34:08,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 110.5) internal successors, (221), 2 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:08,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:34:08,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 16:34:08,414 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:08,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash 439454, now seen corresponding path program 1 times [2023-08-26 16:34:08,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:08,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753757831] [2023-08-26 16:34:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:08,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:08,639 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 16:34:08,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:08,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753757831] [2023-08-26 16:34:08,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753757831] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:08,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:08,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:34:08,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266881438] [2023-08-26 16:34:08,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:08,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:34:08,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:08,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:34:08,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:34:08,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:08,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:08,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:08,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:08,715 INFO L124 PetriNetUnfolderBase]: 551/746 cut-off events. [2023-08-26 16:34:08,715 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:08,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 746 events. 551/746 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2565 event pairs, 250 based on Foata normal form. 0/368 useless extension candidates. Maximal degree in co-relation 1496. Up to 737 conditions per place. [2023-08-26 16:34:08,719 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 16:34:08,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 120 flow [2023-08-26 16:34:08,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:34:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:34:08,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 293 transitions. [2023-08-26 16:34:08,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4283625730994152 [2023-08-26 16:34:08,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 293 transitions. [2023-08-26 16:34:08,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 293 transitions. [2023-08-26 16:34:08,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:08,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 293 transitions. [2023-08-26 16:34:08,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,726 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 70 flow. Second operand 3 states and 293 transitions. [2023-08-26 16:34:08,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 120 flow [2023-08-26 16:34:08,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 16:34:08,727 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 68 flow [2023-08-26 16:34:08,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2023-08-26 16:34:08,728 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -7 predicate places. [2023-08-26 16:34:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 68 flow [2023-08-26 16:34:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:08,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 16:34:08,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 16:34:08,729 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:08,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash 439453, now seen corresponding path program 1 times [2023-08-26 16:34:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:08,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408633072] [2023-08-26 16:34:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:08,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:08,793 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 16:34:08,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:08,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408633072] [2023-08-26 16:34:08,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408633072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:08,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:08,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:34:08,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265110740] [2023-08-26 16:34:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:08,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:34:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:34:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:34:08,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 228 [2023-08-26 16:34:08,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:08,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 228 [2023-08-26 16:34:08,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:08,863 INFO L124 PetriNetUnfolderBase]: 524/707 cut-off events. [2023-08-26 16:34:08,863 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:08,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1423 conditions, 707 events. 524/707 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2411 event pairs, 237 based on Foata normal form. 0/355 useless extension candidates. Maximal degree in co-relation 1419. Up to 698 conditions per place. [2023-08-26 16:34:08,868 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 16:34:08,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 28 transitions, 114 flow [2023-08-26 16:34:08,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:34:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:34:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 282 transitions. [2023-08-26 16:34:08,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2023-08-26 16:34:08,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 282 transitions. [2023-08-26 16:34:08,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 282 transitions. [2023-08-26 16:34:08,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:08,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 282 transitions. [2023-08-26 16:34:08,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.0) internal successors, (282), 3 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,875 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 68 flow. Second operand 3 states and 282 transitions. [2023-08-26 16:34:08,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 28 transitions, 114 flow [2023-08-26 16:34:08,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:08,877 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 65 flow [2023-08-26 16:34:08,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2023-08-26 16:34:08,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-26 16:34:08,878 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 65 flow [2023-08-26 16:34:08,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:08,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:34:08,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 16:34:08,882 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:08,882 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash 422323192, now seen corresponding path program 1 times [2023-08-26 16:34:08,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:08,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066786124] [2023-08-26 16:34:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:08,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:08,951 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 16:34:08,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:08,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066786124] [2023-08-26 16:34:08,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066786124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:08,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:08,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:34:08,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42212168] [2023-08-26 16:34:08,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:08,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:34:08,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:08,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:34:08,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:34:08,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 228 [2023-08-26 16:34:08,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:08,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:08,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 228 [2023-08-26 16:34:08,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:09,038 INFO L124 PetriNetUnfolderBase]: 498/669 cut-off events. [2023-08-26 16:34:09,039 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:09,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1348 conditions, 669 events. 498/669 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2226 event pairs, 225 based on Foata normal form. 0/343 useless extension candidates. Maximal degree in co-relation 1344. Up to 660 conditions per place. [2023-08-26 16:34:09,043 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-26 16:34:09,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 107 flow [2023-08-26 16:34:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:34:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:34:09,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-26 16:34:09,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4093567251461988 [2023-08-26 16:34:09,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-26 16:34:09,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-26 16:34:09,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:09,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-26 16:34:09,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,048 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,049 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 65 flow. Second operand 3 states and 280 transitions. [2023-08-26 16:34:09,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 107 flow [2023-08-26 16:34:09,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:09,050 INFO L231 Difference]: Finished difference. Result has 32 places, 26 transitions, 62 flow [2023-08-26 16:34:09,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=32, PETRI_TRANSITIONS=26} [2023-08-26 16:34:09,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -9 predicate places. [2023-08-26 16:34:09,052 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 26 transitions, 62 flow [2023-08-26 16:34:09,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:09,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 16:34:09,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 16:34:09,053 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:09,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:09,053 INFO L85 PathProgramCache]: Analyzing trace with hash 422323194, now seen corresponding path program 1 times [2023-08-26 16:34:09,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:09,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984046650] [2023-08-26 16:34:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:09,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:09,121 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 16:34:09,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984046650] [2023-08-26 16:34:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984046650] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:09,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:09,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:34:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083768659] [2023-08-26 16:34:09,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:09,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:34:09,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:09,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:34:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:34:09,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:09,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:09,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:09,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:09,183 INFO L124 PetriNetUnfolderBase]: 472/631 cut-off events. [2023-08-26 16:34:09,184 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:09,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 631 events. 472/631 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2054 event pairs, 213 based on Foata normal form. 0/331 useless extension candidates. Maximal degree in co-relation 1269. Up to 622 conditions per place. [2023-08-26 16:34:09,190 INFO L140 encePairwiseOnDemand]: 225/228 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 16:34:09,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 24 transitions, 100 flow [2023-08-26 16:34:09,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:34:09,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:34:09,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-26 16:34:09,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195906432748538 [2023-08-26 16:34:09,196 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-26 16:34:09,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-26 16:34:09,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:09,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-26 16:34:09,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,198 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,199 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,199 INFO L175 Difference]: Start difference. First operand has 32 places, 26 transitions, 62 flow. Second operand 3 states and 287 transitions. [2023-08-26 16:34:09,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 24 transitions, 100 flow [2023-08-26 16:34:09,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:09,201 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 59 flow [2023-08-26 16:34:09,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-26 16:34:09,203 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2023-08-26 16:34:09,203 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 59 flow [2023-08-26 16:34:09,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:09,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:34:09,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 16:34:09,205 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:09,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:09,205 INFO L85 PathProgramCache]: Analyzing trace with hash 2125672564, now seen corresponding path program 1 times [2023-08-26 16:34:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:09,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952762897] [2023-08-26 16:34:09,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:09,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:09,249 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 16:34:09,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:09,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952762897] [2023-08-26 16:34:09,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952762897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:09,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:09,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:34:09,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250182425] [2023-08-26 16:34:09,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:09,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:34:09,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:09,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:34:09,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:34:09,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:09,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:09,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:09,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:09,308 INFO L124 PetriNetUnfolderBase]: 370/502 cut-off events. [2023-08-26 16:34:09,308 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:09,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1016 conditions, 502 events. 370/502 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1580 event pairs, 165 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 1012. Up to 493 conditions per place. [2023-08-26 16:34:09,311 INFO L140 encePairwiseOnDemand]: 226/228 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 16:34:09,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 23 transitions, 97 flow [2023-08-26 16:34:09,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:34:09,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:34:09,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-26 16:34:09,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-26 16:34:09,313 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-26 16:34:09,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-26 16:34:09,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:09,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-26 16:34:09,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,315 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,315 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 59 flow. Second operand 3 states and 285 transitions. [2023-08-26 16:34:09,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 23 transitions, 97 flow [2023-08-26 16:34:09,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:09,316 INFO L231 Difference]: Finished difference. Result has 31 places, 23 transitions, 58 flow [2023-08-26 16:34:09,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=23} [2023-08-26 16:34:09,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2023-08-26 16:34:09,318 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 23 transitions, 58 flow [2023-08-26 16:34:09,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:09,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:34:09,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 16:34:09,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:09,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:09,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2125672565, now seen corresponding path program 1 times [2023-08-26 16:34:09,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:09,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662306339] [2023-08-26 16:34:09,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:09,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:09,452 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 16:34:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:09,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662306339] [2023-08-26 16:34:09,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662306339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:09,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:09,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 16:34:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793372740] [2023-08-26 16:34:09,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 16:34:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 16:34:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 16:34:09,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 228 [2023-08-26 16:34:09,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 80.4) internal successors, (402), 5 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:09,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 228 [2023-08-26 16:34:09,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:09,505 INFO L124 PetriNetUnfolderBase]: 268/373 cut-off events. [2023-08-26 16:34:09,505 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 16:34:09,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 373 events. 268/373 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1093 event pairs, 117 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 755. Up to 364 conditions per place. [2023-08-26 16:34:09,507 INFO L140 encePairwiseOnDemand]: 226/228 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 16:34:09,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 22 transitions, 94 flow [2023-08-26 16:34:09,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:34:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:34:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 257 transitions. [2023-08-26 16:34:09,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3757309941520468 [2023-08-26 16:34:09,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 257 transitions. [2023-08-26 16:34:09,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 257 transitions. [2023-08-26 16:34:09,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:09,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 257 transitions. [2023-08-26 16:34:09,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,513 INFO L175 Difference]: Start difference. First operand has 31 places, 23 transitions, 58 flow. Second operand 3 states and 257 transitions. [2023-08-26 16:34:09,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 22 transitions, 94 flow [2023-08-26 16:34:09,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:09,515 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 57 flow [2023-08-26 16:34:09,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 16:34:09,516 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -10 predicate places. [2023-08-26 16:34:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 57 flow [2023-08-26 16:34:09,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.4) internal successors, (402), 5 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:09,517 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 16:34:09,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 16:34:09,518 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:09,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:09,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1768087474, now seen corresponding path program 1 times [2023-08-26 16:34:09,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:09,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723919595] [2023-08-26 16:34:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:09,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:09,774 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 16:34:09,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723919595] [2023-08-26 16:34:09,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723919595] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:09,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:09,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 16:34:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869373036] [2023-08-26 16:34:09,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:09,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 16:34:09,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:09,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 16:34:09,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 16:34:09,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 228 [2023-08-26 16:34:09,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:09,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 228 [2023-08-26 16:34:09,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:09,845 INFO L124 PetriNetUnfolderBase]: 359/506 cut-off events. [2023-08-26 16:34:09,845 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 16:34:09,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 506 events. 359/506 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1604 event pairs, 39 based on Foata normal form. 1/308 useless extension candidates. Maximal degree in co-relation 1028. Up to 421 conditions per place. [2023-08-26 16:34:09,848 INFO L140 encePairwiseOnDemand]: 223/228 looper letters, 30 selfloop transitions, 4 changer transitions 1/38 dead transitions. [2023-08-26 16:34:09,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 38 transitions, 164 flow [2023-08-26 16:34:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 16:34:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 16:34:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 345 transitions. [2023-08-26 16:34:09,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043859649122807 [2023-08-26 16:34:09,850 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 345 transitions. [2023-08-26 16:34:09,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 345 transitions. [2023-08-26 16:34:09,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:09,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 345 transitions. [2023-08-26 16:34:09,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,852 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 228.0) internal successors, (912), 4 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,852 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 57 flow. Second operand 3 states and 345 transitions. [2023-08-26 16:34:09,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 38 transitions, 164 flow [2023-08-26 16:34:09,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 38 transitions, 163 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:09,854 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 82 flow [2023-08-26 16:34:09,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-26 16:34:09,857 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, -8 predicate places. [2023-08-26 16:34:09,857 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 82 flow [2023-08-26 16:34:09,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:09,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:09,857 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] [2023-08-26 16:34:09,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 16:34:09,858 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:09,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:09,858 INFO L85 PathProgramCache]: Analyzing trace with hash -523653755, now seen corresponding path program 1 times [2023-08-26 16:34:09,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:09,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585470783] [2023-08-26 16:34:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:09,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:09,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:10,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:10,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585470783] [2023-08-26 16:34:10,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585470783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:10,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:10,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:34:10,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778095808] [2023-08-26 16:34:10,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:10,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:34:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:10,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:34:10,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:34:10,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:10,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 82 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:10,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:10,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:10,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:10,274 INFO L124 PetriNetUnfolderBase]: 597/900 cut-off events. [2023-08-26 16:34:10,274 INFO L125 PetriNetUnfolderBase]: For 179/179 co-relation queries the response was YES. [2023-08-26 16:34:10,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 900 events. 597/900 cut-off events. For 179/179 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3299 event pairs, 166 based on Foata normal form. 6/906 useless extension candidates. Maximal degree in co-relation 2177. Up to 420 conditions per place. [2023-08-26 16:34:10,279 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 69 selfloop transitions, 8 changer transitions 3/80 dead transitions. [2023-08-26 16:34:10,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 80 transitions, 399 flow [2023-08-26 16:34:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:34:10,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:34:10,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2023-08-26 16:34:10,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317042606516291 [2023-08-26 16:34:10,282 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2023-08-26 16:34:10,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2023-08-26 16:34:10,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:10,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2023-08-26 16:34:10,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:10,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:10,286 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:10,286 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 82 flow. Second operand 7 states and 689 transitions. [2023-08-26 16:34:10,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 80 transitions, 399 flow [2023-08-26 16:34:10,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 80 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:10,288 INFO L231 Difference]: Finished difference. Result has 43 places, 31 transitions, 147 flow [2023-08-26 16:34:10,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=147, PETRI_PLACES=43, PETRI_TRANSITIONS=31} [2023-08-26 16:34:10,289 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-26 16:34:10,289 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 31 transitions, 147 flow [2023-08-26 16:34:10,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:10,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:10,290 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] [2023-08-26 16:34:10,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 16:34:10,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:10,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash 989131395, now seen corresponding path program 2 times [2023-08-26 16:34:10,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:10,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292090397] [2023-08-26 16:34:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:10,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:10,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292090397] [2023-08-26 16:34:10,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292090397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:10,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148499813] [2023-08-26 16:34:10,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:34:10,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:10,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:10,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:10,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 16:34:10,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:34:10,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:10,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 16:34:10,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:10,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148499813] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:11,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:11,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 16 [2023-08-26 16:34:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295147188] [2023-08-26 16:34:11,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:11,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:34:11,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:11,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:34:11,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-08-26 16:34:11,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 16:34:11,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 31 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:11,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:11,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 16:34:11,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:11,513 INFO L124 PetriNetUnfolderBase]: 816/1236 cut-off events. [2023-08-26 16:34:11,513 INFO L125 PetriNetUnfolderBase]: For 1571/1625 co-relation queries the response was YES. [2023-08-26 16:34:11,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1236 events. 816/1236 cut-off events. For 1571/1625 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5092 event pairs, 172 based on Foata normal form. 6/1238 useless extension candidates. Maximal degree in co-relation 4055. Up to 398 conditions per place. [2023-08-26 16:34:11,521 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 96 selfloop transitions, 18 changer transitions 1/116 dead transitions. [2023-08-26 16:34:11,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 116 transitions, 714 flow [2023-08-26 16:34:11,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 16:34:11,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 16:34:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 839 transitions. [2023-08-26 16:34:11,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45997807017543857 [2023-08-26 16:34:11,524 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 839 transitions. [2023-08-26 16:34:11,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 839 transitions. [2023-08-26 16:34:11,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:11,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 839 transitions. [2023-08-26 16:34:11,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:11,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:11,529 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:11,529 INFO L175 Difference]: Start difference. First operand has 43 places, 31 transitions, 147 flow. Second operand 8 states and 839 transitions. [2023-08-26 16:34:11,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 116 transitions, 714 flow [2023-08-26 16:34:11,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 116 transitions, 670 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-26 16:34:11,535 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 310 flow [2023-08-26 16:34:11,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=310, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-08-26 16:34:11,536 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2023-08-26 16:34:11,536 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 310 flow [2023-08-26 16:34:11,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:11,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:11,536 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] [2023-08-26 16:34:11,544 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 16:34:11,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 16:34:11,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:11,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:11,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1214679969, now seen corresponding path program 1 times [2023-08-26 16:34:11,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:11,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961679210] [2023-08-26 16:34:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:11,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:11,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:11,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:11,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961679210] [2023-08-26 16:34:11,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961679210] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:11,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:11,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:34:11,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804759012] [2023-08-26 16:34:11,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:11,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:34:11,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:11,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:34:11,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:34:11,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:11,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:11,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:11,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:11,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:12,199 INFO L124 PetriNetUnfolderBase]: 1025/1532 cut-off events. [2023-08-26 16:34:12,199 INFO L125 PetriNetUnfolderBase]: For 4701/4701 co-relation queries the response was YES. [2023-08-26 16:34:12,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6065 conditions, 1532 events. 1025/1532 cut-off events. For 4701/4701 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6296 event pairs, 314 based on Foata normal form. 6/1538 useless extension candidates. Maximal degree in co-relation 6050. Up to 862 conditions per place. [2023-08-26 16:34:12,211 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 93 selfloop transitions, 13 changer transitions 9/115 dead transitions. [2023-08-26 16:34:12,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 115 transitions, 896 flow [2023-08-26 16:34:12,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:34:12,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:34:12,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 692 transitions. [2023-08-26 16:34:12,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-08-26 16:34:12,214 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 692 transitions. [2023-08-26 16:34:12,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 692 transitions. [2023-08-26 16:34:12,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:12,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 692 transitions. [2023-08-26 16:34:12,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:12,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:12,220 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:12,220 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 310 flow. Second operand 7 states and 692 transitions. [2023-08-26 16:34:12,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 115 transitions, 896 flow [2023-08-26 16:34:12,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 115 transitions, 888 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-26 16:34:12,234 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 436 flow [2023-08-26 16:34:12,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=436, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-26 16:34:12,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-26 16:34:12,234 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 436 flow [2023-08-26 16:34:12,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:12,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:12,235 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] [2023-08-26 16:34:12,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 16:34:12,235 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:12,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:12,235 INFO L85 PathProgramCache]: Analyzing trace with hash 80461315, now seen corresponding path program 3 times [2023-08-26 16:34:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:12,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49496695] [2023-08-26 16:34:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:12,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:12,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49496695] [2023-08-26 16:34:12,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49496695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:12,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076265148] [2023-08-26 16:34:12,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:34:12,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:12,463 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:12,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 16:34:12,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:34:12,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:12,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:34:12,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:12,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076265148] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:34:12,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:34:12,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2023-08-26 16:34:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028934795] [2023-08-26 16:34:12,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:34:12,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 16:34:12,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:12,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 16:34:12,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-08-26 16:34:12,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:12,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 436 flow. Second operand has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:12,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:12,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:12,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:13,632 INFO L124 PetriNetUnfolderBase]: 1575/2242 cut-off events. [2023-08-26 16:34:13,633 INFO L125 PetriNetUnfolderBase]: For 11011/11011 co-relation queries the response was YES. [2023-08-26 16:34:13,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10396 conditions, 2242 events. 1575/2242 cut-off events. For 11011/11011 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9039 event pairs, 399 based on Foata normal form. 36/2278 useless extension candidates. Maximal degree in co-relation 10375. Up to 1311 conditions per place. [2023-08-26 16:34:13,653 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 122 selfloop transitions, 104 changer transitions 0/226 dead transitions. [2023-08-26 16:34:13,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 226 transitions, 2057 flow [2023-08-26 16:34:13,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 16:34:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 16:34:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1932 transitions. [2023-08-26 16:34:13,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236842105263158 [2023-08-26 16:34:13,658 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1932 transitions. [2023-08-26 16:34:13,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1932 transitions. [2023-08-26 16:34:13,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:13,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1932 transitions. [2023-08-26 16:34:13,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.6) internal successors, (1932), 20 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:13,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 228.0) internal successors, (4788), 21 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:13,669 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 228.0) internal successors, (4788), 21 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:13,669 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 436 flow. Second operand 20 states and 1932 transitions. [2023-08-26 16:34:13,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 226 transitions, 2057 flow [2023-08-26 16:34:13,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 226 transitions, 1964 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-08-26 16:34:13,724 INFO L231 Difference]: Finished difference. Result has 94 places, 148 transitions, 1638 flow [2023-08-26 16:34:13,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1638, PETRI_PLACES=94, PETRI_TRANSITIONS=148} [2023-08-26 16:34:13,725 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 53 predicate places. [2023-08-26 16:34:13,725 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 148 transitions, 1638 flow [2023-08-26 16:34:13,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.0625) internal successors, (1441), 16 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:13,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:13,726 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] [2023-08-26 16:34:13,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:13,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 16:34:13,935 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:13,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:13,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1222942839, now seen corresponding path program 4 times [2023-08-26 16:34:13,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:13,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684113527] [2023-08-26 16:34:13,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:13,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:13,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:14,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:14,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684113527] [2023-08-26 16:34:14,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684113527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:14,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194839824] [2023-08-26 16:34:14,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:34:14,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:14,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:14,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:14,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 16:34:14,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:34:14,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:14,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 16:34:14,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:14,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:14,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:14,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:14,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194839824] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:34:14,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:34:14,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-08-26 16:34:14,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106246404] [2023-08-26 16:34:14,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:34:14,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 16:34:14,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:14,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 16:34:14,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:34:14,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:14,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 148 transitions, 1638 flow. Second operand has 12 states, 12 states have (on average 90.91666666666667) internal successors, (1091), 12 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:14,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:14,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:14,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:15,109 INFO L124 PetriNetUnfolderBase]: 2378/3303 cut-off events. [2023-08-26 16:34:15,110 INFO L125 PetriNetUnfolderBase]: For 29053/29053 co-relation queries the response was YES. [2023-08-26 16:34:15,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19640 conditions, 3303 events. 2378/3303 cut-off events. For 29053/29053 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13543 event pairs, 392 based on Foata normal form. 16/3319 useless extension candidates. Maximal degree in co-relation 19607. Up to 2245 conditions per place. [2023-08-26 16:34:15,157 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 241 selfloop transitions, 126 changer transitions 3/370 dead transitions. [2023-08-26 16:34:15,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 370 transitions, 4567 flow [2023-08-26 16:34:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 16:34:15,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 16:34:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1362 transitions. [2023-08-26 16:34:15,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266917293233083 [2023-08-26 16:34:15,161 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1362 transitions. [2023-08-26 16:34:15,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1362 transitions. [2023-08-26 16:34:15,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:15,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1362 transitions. [2023-08-26 16:34:15,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 97.28571428571429) internal successors, (1362), 14 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:15,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:15,170 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 228.0) internal successors, (3420), 15 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:15,170 INFO L175 Difference]: Start difference. First operand has 94 places, 148 transitions, 1638 flow. Second operand 14 states and 1362 transitions. [2023-08-26 16:34:15,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 370 transitions, 4567 flow [2023-08-26 16:34:15,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 370 transitions, 3719 flow, removed 353 selfloop flow, removed 2 redundant places. [2023-08-26 16:34:15,322 INFO L231 Difference]: Finished difference. Result has 114 places, 251 transitions, 2656 flow [2023-08-26 16:34:15,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2656, PETRI_PLACES=114, PETRI_TRANSITIONS=251} [2023-08-26 16:34:15,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2023-08-26 16:34:15,324 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 251 transitions, 2656 flow [2023-08-26 16:34:15,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 90.91666666666667) internal successors, (1091), 12 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:15,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:15,324 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] [2023-08-26 16:34:15,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:15,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:15,532 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:15,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:15,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1571769229, now seen corresponding path program 1 times [2023-08-26 16:34:15,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:15,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023757135] [2023-08-26 16:34:15,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:15,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:15,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:15,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023757135] [2023-08-26 16:34:15,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023757135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:15,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987756689] [2023-08-26 16:34:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:15,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:15,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:15,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:15,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 16:34:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:15,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:34:15,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:15,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:17,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987756689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:34:17,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:34:17,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 14 [2023-08-26 16:34:17,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5562981] [2023-08-26 16:34:17,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:34:17,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 16:34:17,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:17,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 16:34:17,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-26 16:34:17,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:17,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 251 transitions, 2656 flow. Second operand has 14 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:17,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:17,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:17,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:20,333 INFO L124 PetriNetUnfolderBase]: 4221/5945 cut-off events. [2023-08-26 16:34:20,334 INFO L125 PetriNetUnfolderBase]: For 57396/57396 co-relation queries the response was YES. [2023-08-26 16:34:20,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36505 conditions, 5945 events. 4221/5945 cut-off events. For 57396/57396 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 28394 event pairs, 375 based on Foata normal form. 60/6005 useless extension candidates. Maximal degree in co-relation 36463. Up to 2160 conditions per place. [2023-08-26 16:34:20,429 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 372 selfloop transitions, 301 changer transitions 2/675 dead transitions. [2023-08-26 16:34:20,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 675 transitions, 8200 flow [2023-08-26 16:34:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 16:34:20,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 16:34:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2460 transitions. [2023-08-26 16:34:20,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2023-08-26 16:34:20,436 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2460 transitions. [2023-08-26 16:34:20,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2460 transitions. [2023-08-26 16:34:20,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:20,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2460 transitions. [2023-08-26 16:34:20,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 98.4) internal successors, (2460), 25 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:20,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:20,451 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:20,451 INFO L175 Difference]: Start difference. First operand has 114 places, 251 transitions, 2656 flow. Second operand 25 states and 2460 transitions. [2023-08-26 16:34:20,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 675 transitions, 8200 flow [2023-08-26 16:34:20,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 675 transitions, 7589 flow, removed 284 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:20,825 INFO L231 Difference]: Finished difference. Result has 157 places, 455 transitions, 5854 flow [2023-08-26 16:34:20,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5854, PETRI_PLACES=157, PETRI_TRANSITIONS=455} [2023-08-26 16:34:20,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2023-08-26 16:34:20,826 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 455 transitions, 5854 flow [2023-08-26 16:34:20,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 90.42857142857143) internal successors, (1266), 14 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:20,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:20,826 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] [2023-08-26 16:34:20,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:21,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:21,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:21,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:21,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1403318481, now seen corresponding path program 2 times [2023-08-26 16:34:21,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:21,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924918544] [2023-08-26 16:34:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:21,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:21,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:21,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924918544] [2023-08-26 16:34:21,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924918544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:21,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372282489] [2023-08-26 16:34:21,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:34:21,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:21,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:21,249 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 16:34:21,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:34:21,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:21,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 16:34:21,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:21,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:21,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372282489] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:21,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:21,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 9 [2023-08-26 16:34:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217629320] [2023-08-26 16:34:21,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:34:21,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:21,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:34:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-26 16:34:21,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 16:34:21,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 455 transitions, 5854 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:21,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:21,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 16:34:21,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:22,878 INFO L124 PetriNetUnfolderBase]: 4896/6865 cut-off events. [2023-08-26 16:34:22,878 INFO L125 PetriNetUnfolderBase]: For 91432/91548 co-relation queries the response was YES. [2023-08-26 16:34:22,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47813 conditions, 6865 events. 4896/6865 cut-off events. For 91432/91548 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33338 event pairs, 373 based on Foata normal form. 90/6931 useless extension candidates. Maximal degree in co-relation 47751. Up to 2537 conditions per place. [2023-08-26 16:34:22,953 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 509 selfloop transitions, 147 changer transitions 1/669 dead transitions. [2023-08-26 16:34:22,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 669 transitions, 9435 flow [2023-08-26 16:34:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 16:34:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 16:34:22,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 837 transitions. [2023-08-26 16:34:22,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588815789473684 [2023-08-26 16:34:22,955 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 837 transitions. [2023-08-26 16:34:22,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 837 transitions. [2023-08-26 16:34:22,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:22,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 837 transitions. [2023-08-26 16:34:22,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 104.625) internal successors, (837), 8 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:22,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:22,959 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:22,960 INFO L175 Difference]: Start difference. First operand has 157 places, 455 transitions, 5854 flow. Second operand 8 states and 837 transitions. [2023-08-26 16:34:22,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 669 transitions, 9435 flow [2023-08-26 16:34:23,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 669 transitions, 9053 flow, removed 191 selfloop flow, removed 0 redundant places. [2023-08-26 16:34:23,437 INFO L231 Difference]: Finished difference. Result has 169 places, 522 transitions, 7053 flow [2023-08-26 16:34:23,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=5514, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7053, PETRI_PLACES=169, PETRI_TRANSITIONS=522} [2023-08-26 16:34:23,437 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2023-08-26 16:34:23,437 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 522 transitions, 7053 flow [2023-08-26 16:34:23,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:23,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:23,438 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] [2023-08-26 16:34:23,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 16:34:23,638 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:23,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1033915617, now seen corresponding path program 2 times [2023-08-26 16:34:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:23,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410730990] [2023-08-26 16:34:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:23,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:23,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:23,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410730990] [2023-08-26 16:34:23,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410730990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:23,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:23,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:34:23,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365959786] [2023-08-26 16:34:23,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:23,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:34:23,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:23,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:34:23,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:34:23,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:23,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 522 transitions, 7053 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:23,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:23,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:23,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:25,179 INFO L124 PetriNetUnfolderBase]: 5017/7076 cut-off events. [2023-08-26 16:34:25,179 INFO L125 PetriNetUnfolderBase]: For 105106/105106 co-relation queries the response was YES. [2023-08-26 16:34:25,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50644 conditions, 7076 events. 5017/7076 cut-off events. For 105106/105106 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 34680 event pairs, 757 based on Foata normal form. 30/7106 useless extension candidates. Maximal degree in co-relation 50576. Up to 4489 conditions per place. [2023-08-26 16:34:25,260 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 511 selfloop transitions, 99 changer transitions 12/622 dead transitions. [2023-08-26 16:34:25,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 622 transitions, 9459 flow [2023-08-26 16:34:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:34:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:34:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 692 transitions. [2023-08-26 16:34:25,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-08-26 16:34:25,262 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 692 transitions. [2023-08-26 16:34:25,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 692 transitions. [2023-08-26 16:34:25,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:25,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 692 transitions. [2023-08-26 16:34:25,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:25,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:25,268 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:25,268 INFO L175 Difference]: Start difference. First operand has 169 places, 522 transitions, 7053 flow. Second operand 7 states and 692 transitions. [2023-08-26 16:34:25,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 622 transitions, 9459 flow [2023-08-26 16:34:25,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 622 transitions, 9235 flow, removed 94 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:25,860 INFO L231 Difference]: Finished difference. Result has 178 places, 528 transitions, 7205 flow [2023-08-26 16:34:25,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=6833, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7205, PETRI_PLACES=178, PETRI_TRANSITIONS=528} [2023-08-26 16:34:25,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2023-08-26 16:34:25,860 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 528 transitions, 7205 flow [2023-08-26 16:34:25,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:25,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:25,861 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] [2023-08-26 16:34:25,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 16:34:25,861 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:25,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:25,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1797585343, now seen corresponding path program 5 times [2023-08-26 16:34:25,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:25,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635834127] [2023-08-26 16:34:25,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:25,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:26,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635834127] [2023-08-26 16:34:26,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635834127] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:26,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413655518] [2023-08-26 16:34:26,010 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:34:26,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:26,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:26,013 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:26,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 16:34:26,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:34:26,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:26,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:34:26,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:26,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:26,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413655518] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:26,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:26,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 12 [2023-08-26 16:34:26,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100622030] [2023-08-26 16:34:26,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:26,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:34:26,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:26,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:34:26,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:34:26,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:26,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 528 transitions, 7205 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:26,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:26,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:26,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:27,592 INFO L124 PetriNetUnfolderBase]: 5188/7343 cut-off events. [2023-08-26 16:34:27,592 INFO L125 PetriNetUnfolderBase]: For 111764/111764 co-relation queries the response was YES. [2023-08-26 16:34:27,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53090 conditions, 7343 events. 5188/7343 cut-off events. For 111764/111764 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36326 event pairs, 367 based on Foata normal form. 12/7355 useless extension candidates. Maximal degree in co-relation 53018. Up to 2798 conditions per place. [2023-08-26 16:34:27,753 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 342 selfloop transitions, 361 changer transitions 2/705 dead transitions. [2023-08-26 16:34:27,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 705 transitions, 11143 flow [2023-08-26 16:34:27,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:34:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:34:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 701 transitions. [2023-08-26 16:34:27,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392230576441103 [2023-08-26 16:34:27,755 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 701 transitions. [2023-08-26 16:34:27,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 701 transitions. [2023-08-26 16:34:27,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:27,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 701 transitions. [2023-08-26 16:34:27,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.14285714285714) internal successors, (701), 7 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:27,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:27,759 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:27,759 INFO L175 Difference]: Start difference. First operand has 178 places, 528 transitions, 7205 flow. Second operand 7 states and 701 transitions. [2023-08-26 16:34:27,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 705 transitions, 11143 flow [2023-08-26 16:34:28,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 705 transitions, 10887 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-26 16:34:28,452 INFO L231 Difference]: Finished difference. Result has 185 places, 580 transitions, 9303 flow [2023-08-26 16:34:28,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=7038, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=312, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9303, PETRI_PLACES=185, PETRI_TRANSITIONS=580} [2023-08-26 16:34:28,452 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2023-08-26 16:34:28,452 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 580 transitions, 9303 flow [2023-08-26 16:34:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:28,453 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] [2023-08-26 16:34:28,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:28,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 16:34:28,654 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:28,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:28,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1519337089, now seen corresponding path program 6 times [2023-08-26 16:34:28,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:28,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199063979] [2023-08-26 16:34:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:28,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:28,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:28,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:28,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199063979] [2023-08-26 16:34:28,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199063979] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:28,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843592025] [2023-08-26 16:34:28,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:34:28,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:28,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:28,843 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:28,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 16:34:28,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:34:28,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:28,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:34:28,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:29,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:29,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843592025] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:29,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:29,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 15 [2023-08-26 16:34:29,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292877247] [2023-08-26 16:34:29,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:29,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:34:29,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:34:29,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:34:29,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:29,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 580 transitions, 9303 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:29,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:29,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:29,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:30,947 INFO L124 PetriNetUnfolderBase]: 5610/8043 cut-off events. [2023-08-26 16:34:30,947 INFO L125 PetriNetUnfolderBase]: For 155440/155440 co-relation queries the response was YES. [2023-08-26 16:34:30,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64395 conditions, 8043 events. 5610/8043 cut-off events. For 155440/155440 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41574 event pairs, 714 based on Foata normal form. 22/8065 useless extension candidates. Maximal degree in co-relation 64319. Up to 2738 conditions per place. [2023-08-26 16:34:31,028 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 456 selfloop transitions, 276 changer transitions 1/733 dead transitions. [2023-08-26 16:34:31,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 733 transitions, 12894 flow [2023-08-26 16:34:31,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 16:34:31,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 16:34:31,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 807 transitions. [2023-08-26 16:34:31,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44243421052631576 [2023-08-26 16:34:31,030 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 807 transitions. [2023-08-26 16:34:31,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 807 transitions. [2023-08-26 16:34:31,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:31,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 807 transitions. [2023-08-26 16:34:31,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.875) internal successors, (807), 8 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:31,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:31,034 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:31,034 INFO L175 Difference]: Start difference. First operand has 185 places, 580 transitions, 9303 flow. Second operand 8 states and 807 transitions. [2023-08-26 16:34:31,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 733 transitions, 12894 flow [2023-08-26 16:34:31,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 733 transitions, 12604 flow, removed 116 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:32,003 INFO L231 Difference]: Finished difference. Result has 196 places, 628 transitions, 10981 flow [2023-08-26 16:34:32,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=9072, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10981, PETRI_PLACES=196, PETRI_TRANSITIONS=628} [2023-08-26 16:34:32,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2023-08-26 16:34:32,004 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 628 transitions, 10981 flow [2023-08-26 16:34:32,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:32,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:32,004 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] [2023-08-26 16:34:32,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:32,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:32,205 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:32,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:32,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1584022425, now seen corresponding path program 7 times [2023-08-26 16:34:32,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:32,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498224637] [2023-08-26 16:34:32,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:32,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:32,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498224637] [2023-08-26 16:34:32,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498224637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:32,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121082425] [2023-08-26 16:34:32,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 16:34:32,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:32,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:32,362 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:32,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 16:34:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:32,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:34:32,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:32,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:32,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121082425] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:32,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:32,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-08-26 16:34:32,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923036189] [2023-08-26 16:34:32,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:32,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:34:32,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:34:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:34:32,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 16:34:32,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 628 transitions, 10981 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:32,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:32,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 16:34:32,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:34,292 INFO L124 PetriNetUnfolderBase]: 5596/8040 cut-off events. [2023-08-26 16:34:34,292 INFO L125 PetriNetUnfolderBase]: For 172634/172662 co-relation queries the response was YES. [2023-08-26 16:34:34,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66302 conditions, 8040 events. 5596/8040 cut-off events. For 172634/172662 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 41768 event pairs, 936 based on Foata normal form. 33/8065 useless extension candidates. Maximal degree in co-relation 66221. Up to 3788 conditions per place. [2023-08-26 16:34:34,369 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 506 selfloop transitions, 182 changer transitions 1/701 dead transitions. [2023-08-26 16:34:34,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 701 transitions, 13238 flow [2023-08-26 16:34:34,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:34:34,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:34:34,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 620 transitions. [2023-08-26 16:34:34,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45321637426900585 [2023-08-26 16:34:34,371 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 620 transitions. [2023-08-26 16:34:34,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 620 transitions. [2023-08-26 16:34:34,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:34,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 620 transitions. [2023-08-26 16:34:34,373 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.33333333333333) internal successors, (620), 6 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:34,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:34,375 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:34,375 INFO L175 Difference]: Start difference. First operand has 196 places, 628 transitions, 10981 flow. Second operand 6 states and 620 transitions. [2023-08-26 16:34:34,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 701 transitions, 13238 flow [2023-08-26 16:34:35,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 701 transitions, 13091 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:35,526 INFO L231 Difference]: Finished difference. Result has 203 places, 638 transitions, 11623 flow [2023-08-26 16:34:35,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=10855, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11623, PETRI_PLACES=203, PETRI_TRANSITIONS=638} [2023-08-26 16:34:35,527 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 162 predicate places. [2023-08-26 16:34:35,527 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 638 transitions, 11623 flow [2023-08-26 16:34:35,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:35,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:35,527 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] [2023-08-26 16:34:35,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:35,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:35,732 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:35,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:35,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1163269587, now seen corresponding path program 8 times [2023-08-26 16:34:35,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:35,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73287584] [2023-08-26 16:34:35,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:35,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:35,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:35,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73287584] [2023-08-26 16:34:35,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73287584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:35,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35360218] [2023-08-26 16:34:35,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:34:35,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:35,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:35,875 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:35,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 16:34:35,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:34:36,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:36,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:34:36,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:36,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:36,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:36,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35360218] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:36,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:36,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-08-26 16:34:36,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033424250] [2023-08-26 16:34:36,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:36,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:34:36,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:36,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:34:36,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:34:36,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 16:34:36,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 638 transitions, 11623 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:36,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:36,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 16:34:36,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:37,783 INFO L124 PetriNetUnfolderBase]: 5578/8022 cut-off events. [2023-08-26 16:34:37,783 INFO L125 PetriNetUnfolderBase]: For 173889/173917 co-relation queries the response was YES. [2023-08-26 16:34:37,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67255 conditions, 8022 events. 5578/8022 cut-off events. For 173889/173917 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 41739 event pairs, 898 based on Foata normal form. 33/8047 useless extension candidates. Maximal degree in co-relation 67170. Up to 4258 conditions per place. [2023-08-26 16:34:37,855 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 589 selfloop transitions, 102 changer transitions 1/704 dead transitions. [2023-08-26 16:34:37,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 704 transitions, 13788 flow [2023-08-26 16:34:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:34:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:34:37,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 620 transitions. [2023-08-26 16:34:37,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45321637426900585 [2023-08-26 16:34:37,858 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 620 transitions. [2023-08-26 16:34:37,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 620 transitions. [2023-08-26 16:34:37,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:37,858 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 620 transitions. [2023-08-26 16:34:37,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.33333333333333) internal successors, (620), 6 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:37,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:37,861 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:37,861 INFO L175 Difference]: Start difference. First operand has 203 places, 638 transitions, 11623 flow. Second operand 6 states and 620 transitions. [2023-08-26 16:34:37,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 704 transitions, 13788 flow [2023-08-26 16:34:38,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 704 transitions, 13669 flow, removed 41 selfloop flow, removed 1 redundant places. [2023-08-26 16:34:38,964 INFO L231 Difference]: Finished difference. Result has 209 places, 643 transitions, 11891 flow [2023-08-26 16:34:38,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=11510, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=11891, PETRI_PLACES=209, PETRI_TRANSITIONS=643} [2023-08-26 16:34:38,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2023-08-26 16:34:38,965 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 643 transitions, 11891 flow [2023-08-26 16:34:38,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:38,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:38,966 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] [2023-08-26 16:34:38,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:39,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:39,166 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:39,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:39,167 INFO L85 PathProgramCache]: Analyzing trace with hash -547343721, now seen corresponding path program 9 times [2023-08-26 16:34:39,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:39,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589689597] [2023-08-26 16:34:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:39,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:39,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:39,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:39,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:39,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589689597] [2023-08-26 16:34:39,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589689597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:39,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783068001] [2023-08-26 16:34:39,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:34:39,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:39,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:39,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:39,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 16:34:39,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:34:39,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:39,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:34:39,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:39,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:39,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:39,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:39,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783068001] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:39,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:39,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 15 [2023-08-26 16:34:39,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668232147] [2023-08-26 16:34:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:39,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:34:39,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:34:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:34:39,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 16:34:39,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 643 transitions, 11891 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:39,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:39,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 16:34:39,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:41,238 INFO L124 PetriNetUnfolderBase]: 5599/8073 cut-off events. [2023-08-26 16:34:41,238 INFO L125 PetriNetUnfolderBase]: For 174627/174655 co-relation queries the response was YES. [2023-08-26 16:34:41,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68310 conditions, 8073 events. 5599/8073 cut-off events. For 174627/174655 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 42319 event pairs, 906 based on Foata normal form. 59/8124 useless extension candidates. Maximal degree in co-relation 68223. Up to 4223 conditions per place. [2023-08-26 16:34:41,319 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 587 selfloop transitions, 112 changer transitions 1/712 dead transitions. [2023-08-26 16:34:41,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 712 transitions, 14073 flow [2023-08-26 16:34:41,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:34:41,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:34:41,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 622 transitions. [2023-08-26 16:34:41,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546783625730994 [2023-08-26 16:34:41,321 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 622 transitions. [2023-08-26 16:34:41,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 622 transitions. [2023-08-26 16:34:41,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:41,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 622 transitions. [2023-08-26 16:34:41,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.66666666666667) internal successors, (622), 6 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:41,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:41,324 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:41,324 INFO L175 Difference]: Start difference. First operand has 209 places, 643 transitions, 11891 flow. Second operand 6 states and 622 transitions. [2023-08-26 16:34:41,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 712 transitions, 14073 flow [2023-08-26 16:34:42,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 712 transitions, 13929 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-08-26 16:34:42,413 INFO L231 Difference]: Finished difference. Result has 213 places, 649 transitions, 12149 flow [2023-08-26 16:34:42,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=11747, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12149, PETRI_PLACES=213, PETRI_TRANSITIONS=649} [2023-08-26 16:34:42,414 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2023-08-26 16:34:42,414 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 649 transitions, 12149 flow [2023-08-26 16:34:42,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:42,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:42,415 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] [2023-08-26 16:34:42,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 16:34:42,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 16:34:42,616 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:42,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1690937487, now seen corresponding path program 10 times [2023-08-26 16:34:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:42,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860204047] [2023-08-26 16:34:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:42,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860204047] [2023-08-26 16:34:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860204047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057312957] [2023-08-26 16:34:42,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:34:42,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:42,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:42,821 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:42,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 16:34:42,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:34:42,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:42,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:34:42,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:42,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:43,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057312957] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:43,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:43,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 11 [2023-08-26 16:34:43,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99875282] [2023-08-26 16:34:43,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:43,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:34:43,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:43,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:34:43,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-08-26 16:34:43,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 16:34:43,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 649 transitions, 12149 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:43,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:43,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 16:34:43,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:44,640 INFO L124 PetriNetUnfolderBase]: 5561/7995 cut-off events. [2023-08-26 16:34:44,640 INFO L125 PetriNetUnfolderBase]: For 176105/176133 co-relation queries the response was YES. [2023-08-26 16:34:44,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67875 conditions, 7995 events. 5561/7995 cut-off events. For 176105/176133 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 41646 event pairs, 926 based on Foata normal form. 45/8032 useless extension candidates. Maximal degree in co-relation 67787. Up to 3760 conditions per place. [2023-08-26 16:34:44,709 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 511 selfloop transitions, 190 changer transitions 1/714 dead transitions. [2023-08-26 16:34:44,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 714 transitions, 14143 flow [2023-08-26 16:34:44,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 16:34:44,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 16:34:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 622 transitions. [2023-08-26 16:34:44,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546783625730994 [2023-08-26 16:34:44,711 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 622 transitions. [2023-08-26 16:34:44,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 622 transitions. [2023-08-26 16:34:44,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:44,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 622 transitions. [2023-08-26 16:34:44,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 103.66666666666667) internal successors, (622), 6 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:44,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:44,714 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 228.0) internal successors, (1596), 7 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:44,714 INFO L175 Difference]: Start difference. First operand has 213 places, 649 transitions, 12149 flow. Second operand 6 states and 622 transitions. [2023-08-26 16:34:44,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 714 transitions, 14143 flow [2023-08-26 16:34:45,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 714 transitions, 14011 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-26 16:34:45,723 INFO L231 Difference]: Finished difference. Result has 216 places, 649 transitions, 12397 flow [2023-08-26 16:34:45,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=12017, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12397, PETRI_PLACES=216, PETRI_TRANSITIONS=649} [2023-08-26 16:34:45,723 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2023-08-26 16:34:45,724 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 649 transitions, 12397 flow [2023-08-26 16:34:45,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:45,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:45,724 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] [2023-08-26 16:34:45,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-26 16:34:45,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 16:34:45,925 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:45,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash -559824491, now seen corresponding path program 3 times [2023-08-26 16:34:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:45,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566406999] [2023-08-26 16:34:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:45,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:46,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566406999] [2023-08-26 16:34:46,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566406999] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:46,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35072392] [2023-08-26 16:34:46,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:34:46,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:46,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:46,047 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:46,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 16:34:46,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:34:46,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:46,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:34:46,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:46,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:46,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35072392] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:46,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:34:46,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 8] total 14 [2023-08-26 16:34:46,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567973776] [2023-08-26 16:34:46,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:34:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:46,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:34:46,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-26 16:34:46,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 228 [2023-08-26 16:34:46,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 649 transitions, 12397 flow. Second operand has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:46,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:46,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 228 [2023-08-26 16:34:46,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:48,514 INFO L124 PetriNetUnfolderBase]: 6026/8661 cut-off events. [2023-08-26 16:34:48,514 INFO L125 PetriNetUnfolderBase]: For 187154/187376 co-relation queries the response was YES. [2023-08-26 16:34:48,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73333 conditions, 8661 events. 6026/8661 cut-off events. For 187154/187376 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 45961 event pairs, 684 based on Foata normal form. 167/8795 useless extension candidates. Maximal degree in co-relation 73245. Up to 3110 conditions per place. [2023-08-26 16:34:48,591 INFO L140 encePairwiseOnDemand]: 221/228 looper letters, 449 selfloop transitions, 329 changer transitions 0/795 dead transitions. [2023-08-26 16:34:48,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 795 transitions, 15755 flow [2023-08-26 16:34:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 16:34:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 16:34:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 831 transitions. [2023-08-26 16:34:48,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4555921052631579 [2023-08-26 16:34:48,593 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 831 transitions. [2023-08-26 16:34:48,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 831 transitions. [2023-08-26 16:34:48,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:48,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 831 transitions. [2023-08-26 16:34:48,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 103.875) internal successors, (831), 8 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:48,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:48,597 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:48,597 INFO L175 Difference]: Start difference. First operand has 216 places, 649 transitions, 12397 flow. Second operand 8 states and 831 transitions. [2023-08-26 16:34:48,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 795 transitions, 15755 flow [2023-08-26 16:34:49,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 795 transitions, 15338 flow, removed 24 selfloop flow, removed 3 redundant places. [2023-08-26 16:34:49,626 INFO L231 Difference]: Finished difference. Result has 225 places, 691 transitions, 13863 flow [2023-08-26 16:34:49,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=11998, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13863, PETRI_PLACES=225, PETRI_TRANSITIONS=691} [2023-08-26 16:34:49,626 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2023-08-26 16:34:49,626 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 691 transitions, 13863 flow [2023-08-26 16:34:49,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 95.16666666666667) internal successors, (571), 6 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:49,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:49,627 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] [2023-08-26 16:34:49,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 16:34:49,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 16:34:49,831 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:49,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:49,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1099860491, now seen corresponding path program 4 times [2023-08-26 16:34:49,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:49,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541736704] [2023-08-26 16:34:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:49,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:50,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:50,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541736704] [2023-08-26 16:34:50,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541736704] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:50,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:50,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:34:50,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703557984] [2023-08-26 16:34:50,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:50,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:34:50,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:50,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:34:50,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:34:50,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:50,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 691 transitions, 13863 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:50,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:50,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:50,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:52,064 INFO L124 PetriNetUnfolderBase]: 6439/9340 cut-off events. [2023-08-26 16:34:52,064 INFO L125 PetriNetUnfolderBase]: For 220283/220283 co-relation queries the response was YES. [2023-08-26 16:34:52,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80123 conditions, 9340 events. 6439/9340 cut-off events. For 220283/220283 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 50714 event pairs, 1097 based on Foata normal form. 52/9392 useless extension candidates. Maximal degree in co-relation 80030. Up to 5045 conditions per place. [2023-08-26 16:34:52,154 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 720 selfloop transitions, 127 changer transitions 14/861 dead transitions. [2023-08-26 16:34:52,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 861 transitions, 17945 flow [2023-08-26 16:34:52,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:34:52,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:34:52,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 693 transitions. [2023-08-26 16:34:52,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342105263157895 [2023-08-26 16:34:52,155 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 693 transitions. [2023-08-26 16:34:52,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 693 transitions. [2023-08-26 16:34:52,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:52,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 693 transitions. [2023-08-26 16:34:52,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.0) internal successors, (693), 7 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:52,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:52,159 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:52,159 INFO L175 Difference]: Start difference. First operand has 225 places, 691 transitions, 13863 flow. Second operand 7 states and 693 transitions. [2023-08-26 16:34:52,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 861 transitions, 17945 flow [2023-08-26 16:34:53,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 861 transitions, 17551 flow, removed 18 selfloop flow, removed 2 redundant places. [2023-08-26 16:34:53,726 INFO L231 Difference]: Finished difference. Result has 233 places, 719 transitions, 14549 flow [2023-08-26 16:34:53,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=13508, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14549, PETRI_PLACES=233, PETRI_TRANSITIONS=719} [2023-08-26 16:34:53,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2023-08-26 16:34:53,727 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 719 transitions, 14549 flow [2023-08-26 16:34:53,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:53,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:53,727 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] [2023-08-26 16:34:53,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-26 16:34:53,727 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:53,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:53,727 INFO L85 PathProgramCache]: Analyzing trace with hash -275215523, now seen corresponding path program 5 times [2023-08-26 16:34:53,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:53,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051100002] [2023-08-26 16:34:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:53,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:53,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:53,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051100002] [2023-08-26 16:34:53,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051100002] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:34:53,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:34:53,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:34:53,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360580773] [2023-08-26 16:34:53,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:34:53,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:34:53,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:53,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:34:53,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:34:53,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:34:53,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 719 transitions, 14549 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:53,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:53,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:34:53,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:34:55,834 INFO L124 PetriNetUnfolderBase]: 6489/9460 cut-off events. [2023-08-26 16:34:55,834 INFO L125 PetriNetUnfolderBase]: For 220986/220986 co-relation queries the response was YES. [2023-08-26 16:34:55,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82288 conditions, 9460 events. 6489/9460 cut-off events. For 220986/220986 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 51828 event pairs, 772 based on Foata normal form. 36/9496 useless extension candidates. Maximal degree in co-relation 82191. Up to 3666 conditions per place. [2023-08-26 16:34:55,931 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 475 selfloop transitions, 401 changer transitions 10/886 dead transitions. [2023-08-26 16:34:55,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 886 transitions, 18797 flow [2023-08-26 16:34:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:34:55,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:34:55,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 685 transitions. [2023-08-26 16:34:55,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4291979949874687 [2023-08-26 16:34:55,933 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 685 transitions. [2023-08-26 16:34:55,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 685 transitions. [2023-08-26 16:34:55,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:34:55,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 685 transitions. [2023-08-26 16:34:55,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.85714285714286) internal successors, (685), 7 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:55,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:55,935 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:55,935 INFO L175 Difference]: Start difference. First operand has 233 places, 719 transitions, 14549 flow. Second operand 7 states and 685 transitions. [2023-08-26 16:34:55,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 886 transitions, 18797 flow [2023-08-26 16:34:57,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 886 transitions, 18510 flow, removed 40 selfloop flow, removed 3 redundant places. [2023-08-26 16:34:57,686 INFO L231 Difference]: Finished difference. Result has 239 places, 736 transitions, 15725 flow [2023-08-26 16:34:57,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=14359, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15725, PETRI_PLACES=239, PETRI_TRANSITIONS=736} [2023-08-26 16:34:57,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2023-08-26 16:34:57,687 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 736 transitions, 15725 flow [2023-08-26 16:34:57,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:57,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:34:57,687 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] [2023-08-26 16:34:57,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-26 16:34:57,688 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:34:57,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:34:57,688 INFO L85 PathProgramCache]: Analyzing trace with hash -68765191, now seen corresponding path program 6 times [2023-08-26 16:34:57,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:34:57,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312187234] [2023-08-26 16:34:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:34:57,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:34:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:34:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:57,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:34:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312187234] [2023-08-26 16:34:57,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312187234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:34:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638324036] [2023-08-26 16:34:57,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:34:57,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:34:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:34:57,808 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:34:57,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 16:34:58,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:34:58,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:34:58,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 16:34:58,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:34:58,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:58,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:34:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:34:59,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638324036] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:34:59,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:34:59,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2023-08-26 16:34:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056368343] [2023-08-26 16:34:59,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:34:59,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-26 16:34:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:34:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-26 16:34:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-08-26 16:34:59,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 228 [2023-08-26 16:34:59,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 736 transitions, 15725 flow. Second operand has 19 states, 19 states have (on average 87.52631578947368) internal successors, (1663), 19 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:34:59,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:34:59,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 228 [2023-08-26 16:34:59,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:35:03,868 INFO L124 PetriNetUnfolderBase]: 9038/13227 cut-off events. [2023-08-26 16:35:03,869 INFO L125 PetriNetUnfolderBase]: For 366104/366104 co-relation queries the response was YES. [2023-08-26 16:35:03,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120280 conditions, 13227 events. 9038/13227 cut-off events. For 366104/366104 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 77811 event pairs, 800 based on Foata normal form. 48/13275 useless extension candidates. Maximal degree in co-relation 120180. Up to 4759 conditions per place. [2023-08-26 16:35:04,162 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 759 selfloop transitions, 590 changer transitions 1/1350 dead transitions. [2023-08-26 16:35:04,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 1350 transitions, 29441 flow [2023-08-26 16:35:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 16:35:04,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 16:35:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2384 transitions. [2023-08-26 16:35:04,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4182456140350877 [2023-08-26 16:35:04,166 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2384 transitions. [2023-08-26 16:35:04,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2384 transitions. [2023-08-26 16:35:04,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:04,167 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2384 transitions. [2023-08-26 16:35:04,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 95.36) internal successors, (2384), 25 states have internal predecessors, (2384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:04,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:04,174 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 228.0) internal successors, (5928), 26 states have internal predecessors, (5928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:04,175 INFO L175 Difference]: Start difference. First operand has 239 places, 736 transitions, 15725 flow. Second operand 25 states and 2384 transitions. [2023-08-26 16:35:04,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 1350 transitions, 29441 flow [2023-08-26 16:35:06,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1350 transitions, 28276 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-08-26 16:35:07,012 INFO L231 Difference]: Finished difference. Result has 274 places, 941 transitions, 21792 flow [2023-08-26 16:35:07,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=14991, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=735, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=21792, PETRI_PLACES=274, PETRI_TRANSITIONS=941} [2023-08-26 16:35:07,013 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2023-08-26 16:35:07,013 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 941 transitions, 21792 flow [2023-08-26 16:35:07,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 87.52631578947368) internal successors, (1663), 19 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:07,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:07,014 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] [2023-08-26 16:35:07,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 16:35:07,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 16:35:07,224 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:35:07,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:07,224 INFO L85 PathProgramCache]: Analyzing trace with hash 2106802643, now seen corresponding path program 3 times [2023-08-26 16:35:07,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:07,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384740155] [2023-08-26 16:35:07,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:07,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:07,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:07,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384740155] [2023-08-26 16:35:07,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384740155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:35:07,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:35:07,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:35:07,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849860447] [2023-08-26 16:35:07,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:35:07,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:35:07,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:35:07,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:35:07,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:35:07,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:35:07,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 941 transitions, 21792 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:07,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:35:07,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:35:07,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:35:10,905 INFO L124 PetriNetUnfolderBase]: 9037/13232 cut-off events. [2023-08-26 16:35:10,905 INFO L125 PetriNetUnfolderBase]: For 394600/394600 co-relation queries the response was YES. [2023-08-26 16:35:11,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127255 conditions, 13232 events. 9037/13232 cut-off events. For 394600/394600 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 77454 event pairs, 1842 based on Foata normal form. 6/13238 useless extension candidates. Maximal degree in co-relation 127141. Up to 8030 conditions per place. [2023-08-26 16:35:11,100 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 878 selfloop transitions, 166 changer transitions 7/1051 dead transitions. [2023-08-26 16:35:11,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1051 transitions, 25274 flow [2023-08-26 16:35:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:35:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:35:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 690 transitions. [2023-08-26 16:35:11,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4323308270676692 [2023-08-26 16:35:11,101 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 690 transitions. [2023-08-26 16:35:11,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 690 transitions. [2023-08-26 16:35:11,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:11,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 690 transitions. [2023-08-26 16:35:11,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.57142857142857) internal successors, (690), 7 states have internal predecessors, (690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:11,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:11,104 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:11,104 INFO L175 Difference]: Start difference. First operand has 274 places, 941 transitions, 21792 flow. Second operand 7 states and 690 transitions. [2023-08-26 16:35:11,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1051 transitions, 25274 flow [2023-08-26 16:35:14,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1051 transitions, 24777 flow, removed 144 selfloop flow, removed 6 redundant places. [2023-08-26 16:35:14,895 INFO L231 Difference]: Finished difference. Result has 276 places, 944 transitions, 21782 flow [2023-08-26 16:35:14,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21307, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=775, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21782, PETRI_PLACES=276, PETRI_TRANSITIONS=944} [2023-08-26 16:35:14,897 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 235 predicate places. [2023-08-26 16:35:14,897 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 944 transitions, 21782 flow [2023-08-26 16:35:14,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:14,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:14,897 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] [2023-08-26 16:35:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-26 16:35:14,897 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:35:14,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash 843218861, now seen corresponding path program 4 times [2023-08-26 16:35:14,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:14,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654153706] [2023-08-26 16:35:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:14,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:14,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:15,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:15,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654153706] [2023-08-26 16:35:15,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654153706] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:35:15,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:35:15,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:35:15,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141226703] [2023-08-26 16:35:15,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:35:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:35:15,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:35:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:35:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:35:15,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:35:15,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 944 transitions, 21782 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:15,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:35:15,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:35:15,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:35:18,583 INFO L124 PetriNetUnfolderBase]: 9047/13269 cut-off events. [2023-08-26 16:35:18,583 INFO L125 PetriNetUnfolderBase]: For 386466/386466 co-relation queries the response was YES. [2023-08-26 16:35:18,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125035 conditions, 13269 events. 9047/13269 cut-off events. For 386466/386466 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 77923 event pairs, 1975 based on Foata normal form. 18/13287 useless extension candidates. Maximal degree in co-relation 124922. Up to 8030 conditions per place. [2023-08-26 16:35:18,739 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 911 selfloop transitions, 109 changer transitions 18/1038 dead transitions. [2023-08-26 16:35:18,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1038 transitions, 25000 flow [2023-08-26 16:35:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:35:18,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:35:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 695 transitions. [2023-08-26 16:35:18,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43546365914786966 [2023-08-26 16:35:18,741 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 695 transitions. [2023-08-26 16:35:18,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 695 transitions. [2023-08-26 16:35:18,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:18,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 695 transitions. [2023-08-26 16:35:18,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.28571428571429) internal successors, (695), 7 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:18,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:18,744 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:18,744 INFO L175 Difference]: Start difference. First operand has 276 places, 944 transitions, 21782 flow. Second operand 7 states and 695 transitions. [2023-08-26 16:35:18,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1038 transitions, 25000 flow [2023-08-26 16:35:22,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1038 transitions, 24646 flow, removed 13 selfloop flow, removed 4 redundant places. [2023-08-26 16:35:22,365 INFO L231 Difference]: Finished difference. Result has 279 places, 943 transitions, 21645 flow [2023-08-26 16:35:22,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21440, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=21645, PETRI_PLACES=279, PETRI_TRANSITIONS=943} [2023-08-26 16:35:22,365 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2023-08-26 16:35:22,365 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 943 transitions, 21645 flow [2023-08-26 16:35:22,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:22,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:22,366 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] [2023-08-26 16:35:22,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 16:35:22,366 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:35:22,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:22,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1010069217, now seen corresponding path program 7 times [2023-08-26 16:35:22,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:22,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198376257] [2023-08-26 16:35:22,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:22,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:22,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:22,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:22,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198376257] [2023-08-26 16:35:22,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198376257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:35:22,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:35:22,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:35:22,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439668576] [2023-08-26 16:35:22,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:35:22,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:35:22,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:35:22,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:35:22,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:35:22,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:35:22,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 943 transitions, 21645 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:22,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:35:22,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:35:22,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:35:26,318 INFO L124 PetriNetUnfolderBase]: 9124/13443 cut-off events. [2023-08-26 16:35:26,318 INFO L125 PetriNetUnfolderBase]: For 379085/379085 co-relation queries the response was YES. [2023-08-26 16:35:26,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125468 conditions, 13443 events. 9124/13443 cut-off events. For 379085/379085 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 79922 event pairs, 2393 based on Foata normal form. 48/13491 useless extension candidates. Maximal degree in co-relation 125353. Up to 12310 conditions per place. [2023-08-26 16:35:26,505 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 878 selfloop transitions, 139 changer transitions 9/1026 dead transitions. [2023-08-26 16:35:26,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1026 transitions, 24948 flow [2023-08-26 16:35:26,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:35:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:35:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 679 transitions. [2023-08-26 16:35:26,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-26 16:35:26,507 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 679 transitions. [2023-08-26 16:35:26,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 679 transitions. [2023-08-26 16:35:26,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:26,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 679 transitions. [2023-08-26 16:35:26,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:26,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:26,509 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:26,509 INFO L175 Difference]: Start difference. First operand has 279 places, 943 transitions, 21645 flow. Second operand 7 states and 679 transitions. [2023-08-26 16:35:26,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1026 transitions, 24948 flow [2023-08-26 16:35:30,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 1026 transitions, 24692 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-26 16:35:30,258 INFO L231 Difference]: Finished difference. Result has 279 places, 955 transitions, 22039 flow [2023-08-26 16:35:30,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21419, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22039, PETRI_PLACES=279, PETRI_TRANSITIONS=955} [2023-08-26 16:35:30,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 238 predicate places. [2023-08-26 16:35:30,259 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 955 transitions, 22039 flow [2023-08-26 16:35:30,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:30,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:30,260 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] [2023-08-26 16:35:30,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 16:35:30,260 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:35:30,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash -33862985, now seen corresponding path program 8 times [2023-08-26 16:35:30,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:30,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736863942] [2023-08-26 16:35:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:30,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:30,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:30,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736863942] [2023-08-26 16:35:30,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736863942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:35:30,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:35:30,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:35:30,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570215137] [2023-08-26 16:35:30,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:35:30,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:35:30,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:35:30,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:35:30,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:35:30,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:35:30,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 955 transitions, 22039 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:30,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:35:30,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:35:30,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:35:33,876 INFO L124 PetriNetUnfolderBase]: 9129/13456 cut-off events. [2023-08-26 16:35:33,876 INFO L125 PetriNetUnfolderBase]: For 386327/386327 co-relation queries the response was YES. [2023-08-26 16:35:34,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125772 conditions, 13456 events. 9129/13456 cut-off events. For 386327/386327 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 80067 event pairs, 2039 based on Foata normal form. 20/13476 useless extension candidates. Maximal degree in co-relation 125657. Up to 8058 conditions per place. [2023-08-26 16:35:34,195 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 918 selfloop transitions, 126 changer transitions 1/1045 dead transitions. [2023-08-26 16:35:34,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1045 transitions, 25265 flow [2023-08-26 16:35:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:35:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:35:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 691 transitions. [2023-08-26 16:35:34,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43295739348370926 [2023-08-26 16:35:34,198 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 691 transitions. [2023-08-26 16:35:34,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 691 transitions. [2023-08-26 16:35:34,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:34,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 691 transitions. [2023-08-26 16:35:34,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:34,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:34,201 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:34,201 INFO L175 Difference]: Start difference. First operand has 279 places, 955 transitions, 22039 flow. Second operand 7 states and 691 transitions. [2023-08-26 16:35:34,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1045 transitions, 25265 flow [2023-08-26 16:35:38,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 1045 transitions, 25055 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-08-26 16:35:38,086 INFO L231 Difference]: Finished difference. Result has 282 places, 957 transitions, 22152 flow [2023-08-26 16:35:38,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21829, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=955, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22152, PETRI_PLACES=282, PETRI_TRANSITIONS=957} [2023-08-26 16:35:38,087 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2023-08-26 16:35:38,087 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 957 transitions, 22152 flow [2023-08-26 16:35:38,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:38,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:38,088 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] [2023-08-26 16:35:38,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-08-26 16:35:38,088 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:35:38,088 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:38,088 INFO L85 PathProgramCache]: Analyzing trace with hash -338177123, now seen corresponding path program 9 times [2023-08-26 16:35:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:38,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610091561] [2023-08-26 16:35:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:38,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:38,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610091561] [2023-08-26 16:35:38,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610091561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:35:38,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:35:38,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:35:38,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357036344] [2023-08-26 16:35:38,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:35:38,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:35:38,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:35:38,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:35:38,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:35:38,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:35:38,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 957 transitions, 22152 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:38,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:35:38,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:35:38,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:35:42,027 INFO L124 PetriNetUnfolderBase]: 9102/13383 cut-off events. [2023-08-26 16:35:42,027 INFO L125 PetriNetUnfolderBase]: For 390508/390508 co-relation queries the response was YES. [2023-08-26 16:35:42,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125398 conditions, 13383 events. 9102/13383 cut-off events. For 390508/390508 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 79236 event pairs, 1864 based on Foata normal form. 68/13451 useless extension candidates. Maximal degree in co-relation 125283. Up to 8058 conditions per place. [2023-08-26 16:35:42,177 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 878 selfloop transitions, 195 changer transitions 1/1074 dead transitions. [2023-08-26 16:35:42,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 1074 transitions, 25709 flow [2023-08-26 16:35:42,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:35:42,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:35:42,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 692 transitions. [2023-08-26 16:35:42,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43358395989974935 [2023-08-26 16:35:42,179 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 692 transitions. [2023-08-26 16:35:42,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 692 transitions. [2023-08-26 16:35:42,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:42,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 692 transitions. [2023-08-26 16:35:42,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.85714285714286) internal successors, (692), 7 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:42,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:42,182 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:42,182 INFO L175 Difference]: Start difference. First operand has 282 places, 957 transitions, 22152 flow. Second operand 7 states and 692 transitions. [2023-08-26 16:35:42,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 1074 transitions, 25709 flow [2023-08-26 16:35:46,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1074 transitions, 25433 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-08-26 16:35:46,111 INFO L231 Difference]: Finished difference. Result has 284 places, 969 transitions, 22571 flow [2023-08-26 16:35:46,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=21824, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=763, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=22571, PETRI_PLACES=284, PETRI_TRANSITIONS=969} [2023-08-26 16:35:46,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2023-08-26 16:35:46,112 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 969 transitions, 22571 flow [2023-08-26 16:35:46,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:46,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:46,113 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] [2023-08-26 16:35:46,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-08-26 16:35:46,113 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:35:46,113 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash -761794979, now seen corresponding path program 11 times [2023-08-26 16:35:46,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:46,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616112807] [2023-08-26 16:35:46,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:46,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:46,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:46,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616112807] [2023-08-26 16:35:46,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616112807] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:35:46,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428514935] [2023-08-26 16:35:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:35:46,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:35:46,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:35:46,229 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:35:46,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 16:35:46,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:35:46,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:35:46,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:35:46,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:35:46,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:46,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:35:46,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:46,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428514935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:35:46,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:35:46,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 12 [2023-08-26 16:35:46,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504171940] [2023-08-26 16:35:46,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:35:46,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 16:35:46,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:35:46,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 16:35:46,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:35:46,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:35:46,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 969 transitions, 22571 flow. Second operand has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:46,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:35:46,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:35:46,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:35:51,275 INFO L124 PetriNetUnfolderBase]: 10081/15106 cut-off events. [2023-08-26 16:35:51,276 INFO L125 PetriNetUnfolderBase]: For 445052/445052 co-relation queries the response was YES. [2023-08-26 16:35:51,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143102 conditions, 15106 events. 10081/15106 cut-off events. For 445052/445052 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 95070 event pairs, 1664 based on Foata normal form. 40/15146 useless extension candidates. Maximal degree in co-relation 142986. Up to 8135 conditions per place. [2023-08-26 16:35:51,458 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 597 selfloop transitions, 736 changer transitions 5/1338 dead transitions. [2023-08-26 16:35:51,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1338 transitions, 32219 flow [2023-08-26 16:35:51,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 16:35:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 16:35:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1673 transitions. [2023-08-26 16:35:51,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43163054695562436 [2023-08-26 16:35:51,460 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1673 transitions. [2023-08-26 16:35:51,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1673 transitions. [2023-08-26 16:35:51,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:35:51,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1673 transitions. [2023-08-26 16:35:51,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 98.41176470588235) internal successors, (1673), 17 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:51,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 228.0) internal successors, (4104), 18 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:51,465 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 228.0) internal successors, (4104), 18 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:51,465 INFO L175 Difference]: Start difference. First operand has 284 places, 969 transitions, 22571 flow. Second operand 17 states and 1673 transitions. [2023-08-26 16:35:51,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1338 transitions, 32219 flow [2023-08-26 16:35:55,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 1338 transitions, 31805 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-26 16:35:55,843 INFO L231 Difference]: Finished difference. Result has 306 places, 1171 transitions, 30074 flow [2023-08-26 16:35:55,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=22195, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=969, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=30074, PETRI_PLACES=306, PETRI_TRANSITIONS=1171} [2023-08-26 16:35:55,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2023-08-26 16:35:55,845 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 1171 transitions, 30074 flow [2023-08-26 16:35:55,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 91.0) internal successors, (1092), 12 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:55,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:35:55,845 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] [2023-08-26 16:35:55,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 16:35:56,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:35:56,049 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:35:56,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:35:56,049 INFO L85 PathProgramCache]: Analyzing trace with hash -849306129, now seen corresponding path program 12 times [2023-08-26 16:35:56,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:35:56,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752885872] [2023-08-26 16:35:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:35:56,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:35:56,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:35:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:56,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:35:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752885872] [2023-08-26 16:35:56,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752885872] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:35:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221942425] [2023-08-26 16:35:56,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:35:56,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:35:56,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:35:56,175 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:35:56,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 16:35:56,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:35:56,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:35:56,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:35:56,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:35:56,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:56,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:35:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:35:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221942425] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:35:56,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:35:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 15 [2023-08-26 16:35:56,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123314895] [2023-08-26 16:35:56,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:35:56,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 16:35:56,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:35:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 16:35:56,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-26 16:35:56,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:35:56,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 1171 transitions, 30074 flow. Second operand has 15 states, 15 states have (on average 90.46666666666667) internal successors, (1357), 15 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:35:56,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:35:56,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:35:56,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:36:02,701 INFO L124 PetriNetUnfolderBase]: 10879/16570 cut-off events. [2023-08-26 16:36:02,701 INFO L125 PetriNetUnfolderBase]: For 574443/574443 co-relation queries the response was YES. [2023-08-26 16:36:02,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166669 conditions, 16570 events. 10879/16570 cut-off events. For 574443/574443 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 108223 event pairs, 1089 based on Foata normal form. 70/16640 useless extension candidates. Maximal degree in co-relation 166544. Up to 6641 conditions per place. [2023-08-26 16:36:02,929 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 763 selfloop transitions, 862 changer transitions 4/1629 dead transitions. [2023-08-26 16:36:02,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1629 transitions, 41684 flow [2023-08-26 16:36:02,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:36:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:36:02,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2338 transitions. [2023-08-26 16:36:02,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.427266081871345 [2023-08-26 16:36:02,933 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2338 transitions. [2023-08-26 16:36:02,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2338 transitions. [2023-08-26 16:36:02,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:36:02,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2338 transitions. [2023-08-26 16:36:02,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 97.41666666666667) internal successors, (2338), 24 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:02,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:02,938 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:02,938 INFO L175 Difference]: Start difference. First operand has 306 places, 1171 transitions, 30074 flow. Second operand 24 states and 2338 transitions. [2023-08-26 16:36:02,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1629 transitions, 41684 flow [2023-08-26 16:36:10,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1629 transitions, 40559 flow, removed 341 selfloop flow, removed 4 redundant places. [2023-08-26 16:36:10,812 INFO L231 Difference]: Finished difference. Result has 336 places, 1338 transitions, 36588 flow [2023-08-26 16:36:10,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=29311, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=711, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=36588, PETRI_PLACES=336, PETRI_TRANSITIONS=1338} [2023-08-26 16:36:10,813 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2023-08-26 16:36:10,813 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1338 transitions, 36588 flow [2023-08-26 16:36:10,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 90.46666666666667) internal successors, (1357), 15 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:10,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:36:10,813 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] [2023-08-26 16:36:10,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 16:36:11,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:36:11,014 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:36:11,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:36:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash 468797967, now seen corresponding path program 13 times [2023-08-26 16:36:11,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:36:11,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878818415] [2023-08-26 16:36:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:36:11,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:36:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:36:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:36:11,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:36:11,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878818415] [2023-08-26 16:36:11,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878818415] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:36:11,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:36:11,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:36:11,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038766716] [2023-08-26 16:36:11,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:36:11,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:36:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:36:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:36:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:36:11,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:36:11,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1338 transitions, 36588 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:11,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:36:11,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:36:11,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:36:16,714 INFO L124 PetriNetUnfolderBase]: 10878/16547 cut-off events. [2023-08-26 16:36:16,714 INFO L125 PetriNetUnfolderBase]: For 643887/643887 co-relation queries the response was YES. [2023-08-26 16:36:16,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171867 conditions, 16547 events. 10878/16547 cut-off events. For 643887/643887 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 107719 event pairs, 2827 based on Foata normal form. 2/16549 useless extension candidates. Maximal degree in co-relation 171732. Up to 15564 conditions per place. [2023-08-26 16:36:16,985 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1220 selfloop transitions, 160 changer transitions 3/1383 dead transitions. [2023-08-26 16:36:16,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1383 transitions, 39878 flow [2023-08-26 16:36:16,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:36:16,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:36:16,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 671 transitions. [2023-08-26 16:36:16,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42042606516290726 [2023-08-26 16:36:16,987 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 671 transitions. [2023-08-26 16:36:16,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 671 transitions. [2023-08-26 16:36:16,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:36:16,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 671 transitions. [2023-08-26 16:36:16,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 95.85714285714286) internal successors, (671), 7 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:16,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:16,988 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:16,988 INFO L175 Difference]: Start difference. First operand has 336 places, 1338 transitions, 36588 flow. Second operand 7 states and 671 transitions. [2023-08-26 16:36:16,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1383 transitions, 39878 flow [2023-08-26 16:36:27,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1383 transitions, 39183 flow, removed 265 selfloop flow, removed 4 redundant places. [2023-08-26 16:36:27,898 INFO L231 Difference]: Finished difference. Result has 340 places, 1342 transitions, 36344 flow [2023-08-26 16:36:27,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=35896, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36344, PETRI_PLACES=340, PETRI_TRANSITIONS=1342} [2023-08-26 16:36:27,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2023-08-26 16:36:27,899 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 1342 transitions, 36344 flow [2023-08-26 16:36:27,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:27,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:36:27,899 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] [2023-08-26 16:36:27,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-26 16:36:27,900 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:36:27,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:36:27,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1115790837, now seen corresponding path program 14 times [2023-08-26 16:36:27,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:36:27,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462650937] [2023-08-26 16:36:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:36:27,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:36:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:36:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:36:28,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:36:28,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462650937] [2023-08-26 16:36:28,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462650937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:36:28,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:36:28,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:36:28,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608487095] [2023-08-26 16:36:28,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:36:28,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:36:28,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:36:28,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:36:28,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:36:28,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:36:28,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 1342 transitions, 36344 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:28,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:36:28,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:36:28,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:36:35,289 INFO L124 PetriNetUnfolderBase]: 10862/16501 cut-off events. [2023-08-26 16:36:35,290 INFO L125 PetriNetUnfolderBase]: For 631466/631466 co-relation queries the response was YES. [2023-08-26 16:36:35,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169835 conditions, 16501 events. 10862/16501 cut-off events. For 631466/631466 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107195 event pairs, 2824 based on Foata normal form. 16/16517 useless extension candidates. Maximal degree in co-relation 169697. Up to 15499 conditions per place. [2023-08-26 16:36:35,556 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1235 selfloop transitions, 149 changer transitions 1/1385 dead transitions. [2023-08-26 16:36:35,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1385 transitions, 39584 flow [2023-08-26 16:36:35,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:36:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:36:35,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 682 transitions. [2023-08-26 16:36:35,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273182957393484 [2023-08-26 16:36:35,558 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 682 transitions. [2023-08-26 16:36:35,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 682 transitions. [2023-08-26 16:36:35,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:36:35,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 682 transitions. [2023-08-26 16:36:35,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:35,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:35,561 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:35,561 INFO L175 Difference]: Start difference. First operand has 340 places, 1342 transitions, 36344 flow. Second operand 7 states and 682 transitions. [2023-08-26 16:36:35,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1385 transitions, 39584 flow [2023-08-26 16:36:44,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1385 transitions, 39240 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 16:36:44,808 INFO L231 Difference]: Finished difference. Result has 343 places, 1345 transitions, 36387 flow [2023-08-26 16:36:44,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36012, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36387, PETRI_PLACES=343, PETRI_TRANSITIONS=1345} [2023-08-26 16:36:44,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2023-08-26 16:36:44,809 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1345 transitions, 36387 flow [2023-08-26 16:36:44,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:44,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:36:44,809 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] [2023-08-26 16:36:44,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-08-26 16:36:44,810 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:36:44,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:36:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 984480969, now seen corresponding path program 15 times [2023-08-26 16:36:44,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:36:44,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579370135] [2023-08-26 16:36:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:36:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:36:44,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:36:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:36:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:36:44,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579370135] [2023-08-26 16:36:44,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579370135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:36:44,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:36:44,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:36:44,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201846340] [2023-08-26 16:36:44,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:36:44,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:36:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:36:44,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:36:44,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:36:44,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:36:44,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1345 transitions, 36387 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:44,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:36:44,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:36:44,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:36:51,131 INFO L124 PetriNetUnfolderBase]: 10866/16509 cut-off events. [2023-08-26 16:36:51,131 INFO L125 PetriNetUnfolderBase]: For 631122/631122 co-relation queries the response was YES. [2023-08-26 16:36:51,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169887 conditions, 16509 events. 10866/16509 cut-off events. For 631122/631122 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107259 event pairs, 2825 based on Foata normal form. 2/16511 useless extension candidates. Maximal degree in co-relation 169747. Up to 15523 conditions per place. [2023-08-26 16:36:51,384 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1207 selfloop transitions, 167 changer transitions 3/1377 dead transitions. [2023-08-26 16:36:51,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1377 transitions, 39507 flow [2023-08-26 16:36:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:36:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:36:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 672 transitions. [2023-08-26 16:36:51,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-08-26 16:36:51,386 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 672 transitions. [2023-08-26 16:36:51,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 672 transitions. [2023-08-26 16:36:51,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:36:51,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 672 transitions. [2023-08-26 16:36:51,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:51,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:51,388 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:36:51,388 INFO L175 Difference]: Start difference. First operand has 343 places, 1345 transitions, 36387 flow. Second operand 7 states and 672 transitions. [2023-08-26 16:36:51,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1377 transitions, 39507 flow [2023-08-26 16:37:00,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 1377 transitions, 39212 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 16:37:00,875 INFO L231 Difference]: Finished difference. Result has 349 places, 1351 transitions, 36651 flow [2023-08-26 16:37:00,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36104, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36651, PETRI_PLACES=349, PETRI_TRANSITIONS=1351} [2023-08-26 16:37:00,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 308 predicate places. [2023-08-26 16:37:00,876 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 1351 transitions, 36651 flow [2023-08-26 16:37:00,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:00,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:37:00,876 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] [2023-08-26 16:37:00,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-08-26 16:37:00,877 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:37:00,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:37:00,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1336856659, now seen corresponding path program 16 times [2023-08-26 16:37:00,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:37:00,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076018395] [2023-08-26 16:37:00,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:37:00,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:37:00,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:37:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:37:01,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:37:01,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076018395] [2023-08-26 16:37:01,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076018395] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:37:01,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:37:01,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:37:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466985896] [2023-08-26 16:37:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:37:01,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:37:01,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:37:01,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:37:01,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:37:01,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:37:01,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 1351 transitions, 36651 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:01,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:37:01,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:37:01,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:37:07,138 INFO L124 PetriNetUnfolderBase]: 10864/16507 cut-off events. [2023-08-26 16:37:07,138 INFO L125 PetriNetUnfolderBase]: For 630983/630983 co-relation queries the response was YES. [2023-08-26 16:37:07,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170154 conditions, 16507 events. 10864/16507 cut-off events. For 630983/630983 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107155 event pairs, 2814 based on Foata normal form. 2/16509 useless extension candidates. Maximal degree in co-relation 170011. Up to 15523 conditions per place. [2023-08-26 16:37:07,409 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1222 selfloop transitions, 154 changer transitions 3/1379 dead transitions. [2023-08-26 16:37:07,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1379 transitions, 39703 flow [2023-08-26 16:37:07,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:37:07,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:37:07,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 674 transitions. [2023-08-26 16:37:07,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223057644110276 [2023-08-26 16:37:07,414 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 674 transitions. [2023-08-26 16:37:07,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 674 transitions. [2023-08-26 16:37:07,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:37:07,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 674 transitions. [2023-08-26 16:37:07,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.28571428571429) internal successors, (674), 7 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:07,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:07,416 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:07,416 INFO L175 Difference]: Start difference. First operand has 349 places, 1351 transitions, 36651 flow. Second operand 7 states and 674 transitions. [2023-08-26 16:37:07,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1379 transitions, 39703 flow [2023-08-26 16:37:17,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1379 transitions, 39529 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-26 16:37:17,571 INFO L231 Difference]: Finished difference. Result has 355 places, 1354 transitions, 36902 flow [2023-08-26 16:37:17,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36477, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36902, PETRI_PLACES=355, PETRI_TRANSITIONS=1354} [2023-08-26 16:37:17,572 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 314 predicate places. [2023-08-26 16:37:17,572 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 1354 transitions, 36902 flow [2023-08-26 16:37:17,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:17,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:37:17,573 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] [2023-08-26 16:37:17,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-26 16:37:17,573 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:37:17,573 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:37:17,573 INFO L85 PathProgramCache]: Analyzing trace with hash 242765071, now seen corresponding path program 17 times [2023-08-26 16:37:17,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:37:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15840428] [2023-08-26 16:37:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:37:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:37:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:37:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:37:17,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:37:17,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15840428] [2023-08-26 16:37:17,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15840428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:37:17,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:37:17,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:37:17,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052225587] [2023-08-26 16:37:17,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:37:17,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:37:17,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:37:17,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:37:17,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:37:17,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:37:17,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 1354 transitions, 36902 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:17,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:37:17,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:37:17,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:37:23,962 INFO L124 PetriNetUnfolderBase]: 10869/16514 cut-off events. [2023-08-26 16:37:23,962 INFO L125 PetriNetUnfolderBase]: For 636443/636443 co-relation queries the response was YES. [2023-08-26 16:37:24,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170454 conditions, 16514 events. 10869/16514 cut-off events. For 636443/636443 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 107255 event pairs, 2816 based on Foata normal form. 2/16516 useless extension candidates. Maximal degree in co-relation 170309. Up to 15527 conditions per place. [2023-08-26 16:37:24,190 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1222 selfloop transitions, 157 changer transitions 3/1382 dead transitions. [2023-08-26 16:37:24,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 1382 transitions, 39955 flow [2023-08-26 16:37:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:37:24,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:37:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 675 transitions. [2023-08-26 16:37:24,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42293233082706766 [2023-08-26 16:37:24,191 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 675 transitions. [2023-08-26 16:37:24,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 675 transitions. [2023-08-26 16:37:24,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:37:24,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 675 transitions. [2023-08-26 16:37:24,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.42857142857143) internal successors, (675), 7 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:24,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:24,194 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:24,194 INFO L175 Difference]: Start difference. First operand has 355 places, 1354 transitions, 36902 flow. Second operand 7 states and 675 transitions. [2023-08-26 16:37:24,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 1382 transitions, 39955 flow [2023-08-26 16:37:33,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 1382 transitions, 39655 flow, removed 14 selfloop flow, removed 2 redundant places. [2023-08-26 16:37:33,779 INFO L231 Difference]: Finished difference. Result has 359 places, 1357 transitions, 36998 flow [2023-08-26 16:37:33,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36606, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36998, PETRI_PLACES=359, PETRI_TRANSITIONS=1357} [2023-08-26 16:37:33,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2023-08-26 16:37:33,781 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 1357 transitions, 36998 flow [2023-08-26 16:37:33,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:33,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:37:33,781 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] [2023-08-26 16:37:33,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-08-26 16:37:33,781 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:37:33,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:37:33,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1331468597, now seen corresponding path program 18 times [2023-08-26 16:37:33,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:37:33,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215896497] [2023-08-26 16:37:33,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:37:33,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:37:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:37:33,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:37:33,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:37:33,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215896497] [2023-08-26 16:37:33,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215896497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:37:33,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:37:33,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:37:33,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863293756] [2023-08-26 16:37:33,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:37:33,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:37:33,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:37:33,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:37:33,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:37:33,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:37:33,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 1357 transitions, 36998 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:33,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:37:33,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:37:33,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:37:40,239 INFO L124 PetriNetUnfolderBase]: 10888/16547 cut-off events. [2023-08-26 16:37:40,240 INFO L125 PetriNetUnfolderBase]: For 631451/631451 co-relation queries the response was YES. [2023-08-26 16:37:40,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170807 conditions, 16547 events. 10888/16547 cut-off events. For 631451/631451 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 107523 event pairs, 2810 based on Foata normal form. 16/16563 useless extension candidates. Maximal degree in co-relation 170661. Up to 15541 conditions per place. [2023-08-26 16:37:40,497 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1231 selfloop transitions, 160 changer transitions 1/1392 dead transitions. [2023-08-26 16:37:40,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1392 transitions, 40157 flow [2023-08-26 16:37:40,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:37:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:37:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 681 transitions. [2023-08-26 16:37:40,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266917293233083 [2023-08-26 16:37:40,499 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 681 transitions. [2023-08-26 16:37:40,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 681 transitions. [2023-08-26 16:37:40,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:37:40,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 681 transitions. [2023-08-26 16:37:40,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.28571428571429) internal successors, (681), 7 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:40,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:40,500 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:40,501 INFO L175 Difference]: Start difference. First operand has 359 places, 1357 transitions, 36998 flow. Second operand 7 states and 681 transitions. [2023-08-26 16:37:40,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1392 transitions, 40157 flow [2023-08-26 16:37:49,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 1392 transitions, 39988 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-26 16:37:49,966 INFO L231 Difference]: Finished difference. Result has 363 places, 1360 transitions, 37247 flow [2023-08-26 16:37:49,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36829, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37247, PETRI_PLACES=363, PETRI_TRANSITIONS=1360} [2023-08-26 16:37:49,967 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2023-08-26 16:37:49,967 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 1360 transitions, 37247 flow [2023-08-26 16:37:49,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:49,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:37:49,967 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] [2023-08-26 16:37:49,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-08-26 16:37:49,968 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:37:49,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:37:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash -109610619, now seen corresponding path program 19 times [2023-08-26 16:37:49,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:37:49,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186006611] [2023-08-26 16:37:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:37:49,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:37:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:37:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:37:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:37:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186006611] [2023-08-26 16:37:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186006611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:37:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:37:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:37:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232761061] [2023-08-26 16:37:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:37:50,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:37:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:37:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:37:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:37:50,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:37:50,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 1360 transitions, 37247 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:50,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:37:50,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:37:50,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:37:56,463 INFO L124 PetriNetUnfolderBase]: 10886/16545 cut-off events. [2023-08-26 16:37:56,463 INFO L125 PetriNetUnfolderBase]: For 638064/638064 co-relation queries the response was YES. [2023-08-26 16:37:56,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171026 conditions, 16545 events. 10886/16545 cut-off events. For 638064/638064 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 107601 event pairs, 2813 based on Foata normal form. 2/16547 useless extension candidates. Maximal degree in co-relation 170879. Up to 15561 conditions per place. [2023-08-26 16:37:56,780 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1212 selfloop transitions, 170 changer transitions 3/1385 dead transitions. [2023-08-26 16:37:56,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1385 transitions, 40206 flow [2023-08-26 16:37:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:37:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:37:56,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 673 transitions. [2023-08-26 16:37:56,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216791979949875 [2023-08-26 16:37:56,791 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 673 transitions. [2023-08-26 16:37:56,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 673 transitions. [2023-08-26 16:37:56,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:37:56,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 673 transitions. [2023-08-26 16:37:56,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.14285714285714) internal successors, (673), 7 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:56,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:56,793 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:37:56,793 INFO L175 Difference]: Start difference. First operand has 363 places, 1360 transitions, 37247 flow. Second operand 7 states and 673 transitions. [2023-08-26 16:37:56,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1385 transitions, 40206 flow [2023-08-26 16:38:06,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 1385 transitions, 39874 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 16:38:06,161 INFO L231 Difference]: Finished difference. Result has 364 places, 1359 transitions, 37222 flow [2023-08-26 16:38:06,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36882, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37222, PETRI_PLACES=364, PETRI_TRANSITIONS=1359} [2023-08-26 16:38:06,162 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2023-08-26 16:38:06,163 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 1359 transitions, 37222 flow [2023-08-26 16:38:06,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:06,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:38:06,163 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] [2023-08-26 16:38:06,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-08-26 16:38:06,163 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:38:06,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:38:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1683844287, now seen corresponding path program 20 times [2023-08-26 16:38:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:38:06,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566342552] [2023-08-26 16:38:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:38:06,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:38:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:38:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:38:06,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:38:06,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566342552] [2023-08-26 16:38:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566342552] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:38:06,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:38:06,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:38:06,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505647750] [2023-08-26 16:38:06,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:38:06,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:38:06,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:38:06,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:38:06,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:38:06,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:38:06,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 1359 transitions, 37222 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:06,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:38:06,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:38:06,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:38:12,474 INFO L124 PetriNetUnfolderBase]: 10864/16483 cut-off events. [2023-08-26 16:38:12,475 INFO L125 PetriNetUnfolderBase]: For 642494/642494 co-relation queries the response was YES. [2023-08-26 16:38:12,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170530 conditions, 16483 events. 10864/16483 cut-off events. For 642494/642494 co-relation queries the response was YES. Maximal size of possible extension queue 973. Compared 106834 event pairs, 2792 based on Foata normal form. 16/16499 useless extension candidates. Maximal degree in co-relation 170383. Up to 15480 conditions per place. [2023-08-26 16:38:12,729 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1218 selfloop transitions, 173 changer transitions 1/1392 dead transitions. [2023-08-26 16:38:12,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 1392 transitions, 40304 flow [2023-08-26 16:38:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:38:12,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:38:12,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 679 transitions. [2023-08-26 16:38:12,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-26 16:38:12,731 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 679 transitions. [2023-08-26 16:38:12,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 679 transitions. [2023-08-26 16:38:12,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:38:12,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 679 transitions. [2023-08-26 16:38:12,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.0) internal successors, (679), 7 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:12,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:12,733 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:12,733 INFO L175 Difference]: Start difference. First operand has 364 places, 1359 transitions, 37222 flow. Second operand 7 states and 679 transitions. [2023-08-26 16:38:12,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 1392 transitions, 40304 flow [2023-08-26 16:38:22,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 1392 transitions, 39958 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-26 16:38:22,258 INFO L231 Difference]: Finished difference. Result has 366 places, 1359 transitions, 37232 flow [2023-08-26 16:38:22,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36876, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37232, PETRI_PLACES=366, PETRI_TRANSITIONS=1359} [2023-08-26 16:38:22,259 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2023-08-26 16:38:22,260 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 1359 transitions, 37232 flow [2023-08-26 16:38:22,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:22,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:38:22,260 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] [2023-08-26 16:38:22,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-08-26 16:38:22,260 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:38:22,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:38:22,260 INFO L85 PathProgramCache]: Analyzing trace with hash 804563877, now seen corresponding path program 5 times [2023-08-26 16:38:22,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:38:22,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749970856] [2023-08-26 16:38:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:38:22,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:38:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:38:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:38:22,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:38:22,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749970856] [2023-08-26 16:38:22,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749970856] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:38:22,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:38:22,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:38:22,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453298040] [2023-08-26 16:38:22,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:38:22,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:38:22,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:38:22,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:38:22,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:38:22,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:38:22,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1359 transitions, 37232 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:22,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:38:22,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:38:22,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:38:28,720 INFO L124 PetriNetUnfolderBase]: 10875/16541 cut-off events. [2023-08-26 16:38:28,720 INFO L125 PetriNetUnfolderBase]: For 639038/639038 co-relation queries the response was YES. [2023-08-26 16:38:28,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170835 conditions, 16541 events. 10875/16541 cut-off events. For 639038/639038 co-relation queries the response was YES. Maximal size of possible extension queue 978. Compared 107803 event pairs, 2774 based on Foata normal form. 30/16571 useless extension candidates. Maximal degree in co-relation 170687. Up to 15375 conditions per place. [2023-08-26 16:38:28,971 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1239 selfloop transitions, 160 changer transitions 13/1412 dead transitions. [2023-08-26 16:38:28,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 1412 transitions, 40570 flow [2023-08-26 16:38:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:38:28,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:38:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 689 transitions. [2023-08-26 16:38:28,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317042606516291 [2023-08-26 16:38:28,972 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 689 transitions. [2023-08-26 16:38:28,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 689 transitions. [2023-08-26 16:38:28,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:38:28,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 689 transitions. [2023-08-26 16:38:28,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.42857142857143) internal successors, (689), 7 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:28,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:28,975 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:28,975 INFO L175 Difference]: Start difference. First operand has 366 places, 1359 transitions, 37232 flow. Second operand 7 states and 689 transitions. [2023-08-26 16:38:28,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 1412 transitions, 40570 flow [2023-08-26 16:38:38,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1412 transitions, 40262 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-26 16:38:38,359 INFO L231 Difference]: Finished difference. Result has 371 places, 1360 transitions, 37290 flow [2023-08-26 16:38:38,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36888, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37290, PETRI_PLACES=371, PETRI_TRANSITIONS=1360} [2023-08-26 16:38:38,360 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2023-08-26 16:38:38,360 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 1360 transitions, 37290 flow [2023-08-26 16:38:38,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:38,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:38:38,360 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] [2023-08-26 16:38:38,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-08-26 16:38:38,361 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:38:38,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:38:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash -11972683, now seen corresponding path program 6 times [2023-08-26 16:38:38,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:38:38,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611480182] [2023-08-26 16:38:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:38:38,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:38:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:38:38,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:38:38,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:38:38,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611480182] [2023-08-26 16:38:38,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611480182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:38:38,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:38:38,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:38:38,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47973842] [2023-08-26 16:38:38,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:38:38,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:38:38,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:38:38,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:38:38,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:38:38,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:38:38,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 1360 transitions, 37290 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:38,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:38:38,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:38:38,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:38:44,711 INFO L124 PetriNetUnfolderBase]: 10803/16416 cut-off events. [2023-08-26 16:38:44,711 INFO L125 PetriNetUnfolderBase]: For 642835/642835 co-relation queries the response was YES. [2023-08-26 16:38:44,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169748 conditions, 16416 events. 10803/16416 cut-off events. For 642835/642835 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 106629 event pairs, 2772 based on Foata normal form. 24/16440 useless extension candidates. Maximal degree in co-relation 169597. Up to 15370 conditions per place. [2023-08-26 16:38:45,115 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1230 selfloop transitions, 148 changer transitions 21/1399 dead transitions. [2023-08-26 16:38:45,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1399 transitions, 40305 flow [2023-08-26 16:38:45,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:38:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:38:45,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 686 transitions. [2023-08-26 16:38:45,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298245614035088 [2023-08-26 16:38:45,117 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 686 transitions. [2023-08-26 16:38:45,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 686 transitions. [2023-08-26 16:38:45,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:38:45,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 686 transitions. [2023-08-26 16:38:45,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.0) internal successors, (686), 7 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:45,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:45,119 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:45,119 INFO L175 Difference]: Start difference. First operand has 371 places, 1360 transitions, 37290 flow. Second operand 7 states and 686 transitions. [2023-08-26 16:38:45,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1399 transitions, 40305 flow [2023-08-26 16:38:53,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1399 transitions, 39992 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 16:38:53,742 INFO L231 Difference]: Finished difference. Result has 374 places, 1352 transitions, 37063 flow [2023-08-26 16:38:53,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36852, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37063, PETRI_PLACES=374, PETRI_TRANSITIONS=1352} [2023-08-26 16:38:53,744 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2023-08-26 16:38:53,744 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1352 transitions, 37063 flow [2023-08-26 16:38:53,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:53,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:38:53,744 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] [2023-08-26 16:38:53,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-08-26 16:38:53,745 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:38:53,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:38:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -899134851, now seen corresponding path program 7 times [2023-08-26 16:38:53,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:38:53,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204794257] [2023-08-26 16:38:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:38:53,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:38:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:38:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:38:53,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:38:53,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204794257] [2023-08-26 16:38:53,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204794257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:38:53,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:38:53,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:38:53,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666208737] [2023-08-26 16:38:53,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:38:53,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:38:53,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:38:53,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:38:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:38:53,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:38:53,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1352 transitions, 37063 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:38:53,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:38:53,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:38:53,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:39:00,288 INFO L124 PetriNetUnfolderBase]: 10791/16373 cut-off events. [2023-08-26 16:39:00,288 INFO L125 PetriNetUnfolderBase]: For 640820/640820 co-relation queries the response was YES. [2023-08-26 16:39:00,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169514 conditions, 16373 events. 10791/16373 cut-off events. For 640820/640820 co-relation queries the response was YES. Maximal size of possible extension queue 968. Compared 105976 event pairs, 2748 based on Foata normal form. 8/16381 useless extension candidates. Maximal degree in co-relation 169362. Up to 15296 conditions per place. [2023-08-26 16:39:00,531 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1229 selfloop transitions, 163 changer transitions 1/1393 dead transitions. [2023-08-26 16:39:00,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1393 transitions, 40265 flow [2023-08-26 16:39:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:39:00,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:39:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 683 transitions. [2023-08-26 16:39:00,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42794486215538846 [2023-08-26 16:39:00,533 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 683 transitions. [2023-08-26 16:39:00,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 683 transitions. [2023-08-26 16:39:00,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:39:00,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 683 transitions. [2023-08-26 16:39:00,534 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.57142857142857) internal successors, (683), 7 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:00,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:00,535 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:00,535 INFO L175 Difference]: Start difference. First operand has 374 places, 1352 transitions, 37063 flow. Second operand 7 states and 683 transitions. [2023-08-26 16:39:00,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1393 transitions, 40265 flow [2023-08-26 16:39:08,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1393 transitions, 39967 flow, removed 1 selfloop flow, removed 5 redundant places. [2023-08-26 16:39:08,822 INFO L231 Difference]: Finished difference. Result has 374 places, 1355 transitions, 37191 flow [2023-08-26 16:39:08,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36765, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=37191, PETRI_PLACES=374, PETRI_TRANSITIONS=1355} [2023-08-26 16:39:08,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 333 predicate places. [2023-08-26 16:39:08,823 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 1355 transitions, 37191 flow [2023-08-26 16:39:08,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:08,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:39:08,823 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] [2023-08-26 16:39:08,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-08-26 16:39:08,823 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:39:08,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:39:08,823 INFO L85 PathProgramCache]: Analyzing trace with hash 179493245, now seen corresponding path program 21 times [2023-08-26 16:39:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:39:08,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220121883] [2023-08-26 16:39:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:39:08,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:39:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:39:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:39:08,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:39:08,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220121883] [2023-08-26 16:39:08,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220121883] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:39:08,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975570764] [2023-08-26 16:39:08,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 16:39:08,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:39:08,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:39:08,940 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:39:08,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 16:39:09,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 16:39:09,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:39:09,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:39:09,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:39:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:39:09,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:39:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:39:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975570764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:39:09,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:39:09,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-08-26 16:39:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877437186] [2023-08-26 16:39:09,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:39:09,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 16:39:09,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:39:09,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 16:39:09,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-26 16:39:09,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:39:09,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 1355 transitions, 37191 flow. Second operand has 16 states, 16 states have (on average 90.625) internal successors, (1450), 16 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:09,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:39:09,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:39:09,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:39:16,523 INFO L124 PetriNetUnfolderBase]: 12131/18165 cut-off events. [2023-08-26 16:39:16,523 INFO L125 PetriNetUnfolderBase]: For 721044/721044 co-relation queries the response was YES. [2023-08-26 16:39:16,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190208 conditions, 18165 events. 12131/18165 cut-off events. For 721044/721044 co-relation queries the response was YES. Maximal size of possible extension queue 1063. Compared 116877 event pairs, 2478 based on Foata normal form. 42/18207 useless extension candidates. Maximal degree in co-relation 190056. Up to 14990 conditions per place. [2023-08-26 16:39:16,971 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1283 selfloop transitions, 544 changer transitions 1/1828 dead transitions. [2023-08-26 16:39:16,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1828 transitions, 51526 flow [2023-08-26 16:39:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 16:39:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 16:39:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2035 transitions. [2023-08-26 16:39:16,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42502088554720135 [2023-08-26 16:39:16,973 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2035 transitions. [2023-08-26 16:39:16,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2035 transitions. [2023-08-26 16:39:16,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:39:16,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2035 transitions. [2023-08-26 16:39:16,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 96.9047619047619) internal successors, (2035), 21 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:16,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 228.0) internal successors, (5016), 22 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:16,978 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 228.0) internal successors, (5016), 22 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:16,978 INFO L175 Difference]: Start difference. First operand has 374 places, 1355 transitions, 37191 flow. Second operand 21 states and 2035 transitions. [2023-08-26 16:39:16,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1828 transitions, 51526 flow [2023-08-26 16:39:27,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1828 transitions, 51150 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-26 16:39:27,182 INFO L231 Difference]: Finished difference. Result has 398 places, 1602 transitions, 45174 flow [2023-08-26 16:39:27,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=36841, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=45174, PETRI_PLACES=398, PETRI_TRANSITIONS=1602} [2023-08-26 16:39:27,183 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 357 predicate places. [2023-08-26 16:39:27,183 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1602 transitions, 45174 flow [2023-08-26 16:39:27,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.625) internal successors, (1450), 16 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:27,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:39:27,183 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] [2023-08-26 16:39:27,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 16:39:27,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-26 16:39:27,384 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:39:27,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:39:27,384 INFO L85 PathProgramCache]: Analyzing trace with hash -58728773, now seen corresponding path program 22 times [2023-08-26 16:39:27,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:39:27,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586863275] [2023-08-26 16:39:27,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:39:27,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:39:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:39:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:39:27,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:39:27,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586863275] [2023-08-26 16:39:27,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586863275] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:39:27,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539979956] [2023-08-26 16:39:27,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 16:39:27,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:39:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:39:27,475 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:39:27,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 16:39:27,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 16:39:27,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:39:27,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 16:39:27,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:39:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:39:27,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:39:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:39:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539979956] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:39:27,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:39:27,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-08-26 16:39:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162388925] [2023-08-26 16:39:27,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:39:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 16:39:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:39:27,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 16:39:27,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-26 16:39:27,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:39:27,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1602 transitions, 45174 flow. Second operand has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 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 16:39:27,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:39:27,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:39:27,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:39:35,721 INFO L124 PetriNetUnfolderBase]: 12162/18228 cut-off events. [2023-08-26 16:39:35,721 INFO L125 PetriNetUnfolderBase]: For 770626/770626 co-relation queries the response was YES. [2023-08-26 16:39:35,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198095 conditions, 18228 events. 12162/18228 cut-off events. For 770626/770626 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 117606 event pairs, 2479 based on Foata normal form. 66/18294 useless extension candidates. Maximal degree in co-relation 197935. Up to 14917 conditions per place. [2023-08-26 16:39:36,019 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1283 selfloop transitions, 562 changer transitions 1/1846 dead transitions. [2023-08-26 16:39:36,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 1846 transitions, 53530 flow [2023-08-26 16:39:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:39:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:39:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1855 transitions. [2023-08-26 16:39:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42820867959372116 [2023-08-26 16:39:36,022 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1855 transitions. [2023-08-26 16:39:36,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1855 transitions. [2023-08-26 16:39:36,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:39:36,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1855 transitions. [2023-08-26 16:39:36,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 97.63157894736842) internal successors, (1855), 19 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:36,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:36,027 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:36,027 INFO L175 Difference]: Start difference. First operand has 398 places, 1602 transitions, 45174 flow. Second operand 19 states and 1855 transitions. [2023-08-26 16:39:36,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 1846 transitions, 53530 flow [2023-08-26 16:39:48,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 1846 transitions, 52522 flow, removed 487 selfloop flow, removed 1 redundant places. [2023-08-26 16:39:48,491 INFO L231 Difference]: Finished difference. Result has 418 places, 1613 transitions, 45760 flow [2023-08-26 16:39:48,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=44172, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=552, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1041, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=45760, PETRI_PLACES=418, PETRI_TRANSITIONS=1613} [2023-08-26 16:39:48,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 377 predicate places. [2023-08-26 16:39:48,493 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 1613 transitions, 45760 flow [2023-08-26 16:39:48,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 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 16:39:48,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:39:48,493 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] [2023-08-26 16:39:48,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 16:39:48,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:39:48,698 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:39:48,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:39:48,698 INFO L85 PathProgramCache]: Analyzing trace with hash 506039925, now seen corresponding path program 10 times [2023-08-26 16:39:48,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:39:48,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488505654] [2023-08-26 16:39:48,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:39:48,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:39:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:39:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:39:48,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:39:48,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488505654] [2023-08-26 16:39:48,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488505654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:39:48,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:39:48,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:39:48,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597837669] [2023-08-26 16:39:48,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:39:48,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:39:48,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:39:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:39:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:39:48,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:39:48,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 1613 transitions, 45760 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:48,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:39:48,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:39:48,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:39:56,803 INFO L124 PetriNetUnfolderBase]: 12526/18850 cut-off events. [2023-08-26 16:39:56,803 INFO L125 PetriNetUnfolderBase]: For 791033/791033 co-relation queries the response was YES. [2023-08-26 16:39:57,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203166 conditions, 18850 events. 12526/18850 cut-off events. For 791033/791033 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 122816 event pairs, 2550 based on Foata normal form. 18/18868 useless extension candidates. Maximal degree in co-relation 203002. Up to 11212 conditions per place. [2023-08-26 16:39:57,265 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1038 selfloop transitions, 701 changer transitions 1/1740 dead transitions. [2023-08-26 16:39:57,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 1740 transitions, 51408 flow [2023-08-26 16:39:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-26 16:39:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-26 16:39:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 984 transitions. [2023-08-26 16:39:57,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43157894736842106 [2023-08-26 16:39:57,267 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 984 transitions. [2023-08-26 16:39:57,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 984 transitions. [2023-08-26 16:39:57,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:39:57,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 984 transitions. [2023-08-26 16:39:57,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 98.4) internal successors, (984), 10 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:57,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 228.0) internal successors, (2508), 11 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:57,270 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 228.0) internal successors, (2508), 11 states have internal predecessors, (2508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:39:57,270 INFO L175 Difference]: Start difference. First operand has 418 places, 1613 transitions, 45760 flow. Second operand 10 states and 984 transitions. [2023-08-26 16:39:57,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 1740 transitions, 51408 flow [2023-08-26 16:40:09,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1740 transitions, 50592 flow, removed 38 selfloop flow, removed 16 redundant places. [2023-08-26 16:40:09,189 INFO L231 Difference]: Finished difference. Result has 414 places, 1651 transitions, 48819 flow [2023-08-26 16:40:09,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=44897, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=661, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=48819, PETRI_PLACES=414, PETRI_TRANSITIONS=1651} [2023-08-26 16:40:09,190 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 373 predicate places. [2023-08-26 16:40:09,190 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 1651 transitions, 48819 flow [2023-08-26 16:40:09,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:09,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:40:09,190 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] [2023-08-26 16:40:09,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-08-26 16:40:09,191 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:40:09,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:40:09,191 INFO L85 PathProgramCache]: Analyzing trace with hash 737271327, now seen corresponding path program 11 times [2023-08-26 16:40:09,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:40:09,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566540108] [2023-08-26 16:40:09,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:40:09,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:40:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:40:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:40:09,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:40:09,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566540108] [2023-08-26 16:40:09,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566540108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:40:09,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996598835] [2023-08-26 16:40:09,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:40:09,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:40:09,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:40:09,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:40:09,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 16:40:09,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:40:09,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:40:09,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:40:09,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:40:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:40:09,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:40:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:40:09,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996598835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:40:09,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:40:09,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-08-26 16:40:09,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228979637] [2023-08-26 16:40:09,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:40:09,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 16:40:09,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:40:09,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 16:40:09,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-26 16:40:09,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:40:09,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1651 transitions, 48819 flow. Second operand has 17 states, 17 states have (on average 90.11764705882354) internal successors, (1532), 17 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:09,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:40:09,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:40:09,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:40:18,362 INFO L124 PetriNetUnfolderBase]: 12833/19243 cut-off events. [2023-08-26 16:40:18,362 INFO L125 PetriNetUnfolderBase]: For 896714/896714 co-relation queries the response was YES. [2023-08-26 16:40:18,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213336 conditions, 19243 events. 12833/19243 cut-off events. For 896714/896714 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 125385 event pairs, 2820 based on Foata normal form. 76/19319 useless extension candidates. Maximal degree in co-relation 213171. Up to 16480 conditions per place. [2023-08-26 16:40:18,665 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1541 selfloop transitions, 418 changer transitions 1/1960 dead transitions. [2023-08-26 16:40:18,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 1960 transitions, 58932 flow [2023-08-26 16:40:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 16:40:18,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 16:40:18,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1843 transitions. [2023-08-26 16:40:18,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2023-08-26 16:40:18,667 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1843 transitions. [2023-08-26 16:40:18,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1843 transitions. [2023-08-26 16:40:18,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:40:18,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1843 transitions. [2023-08-26 16:40:18,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 97.0) internal successors, (1843), 19 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:18,671 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:18,671 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 228.0) internal successors, (4560), 20 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:18,671 INFO L175 Difference]: Start difference. First operand has 414 places, 1651 transitions, 48819 flow. Second operand 19 states and 1843 transitions. [2023-08-26 16:40:18,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 1960 transitions, 58932 flow [2023-08-26 16:40:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 1960 transitions, 58800 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 16:40:32,217 INFO L231 Difference]: Finished difference. Result has 439 places, 1756 transitions, 52849 flow [2023-08-26 16:40:32,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=48710, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=52849, PETRI_PLACES=439, PETRI_TRANSITIONS=1756} [2023-08-26 16:40:32,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2023-08-26 16:40:32,218 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1756 transitions, 52849 flow [2023-08-26 16:40:32,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 90.11764705882354) internal successors, (1532), 17 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:32,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:40:32,218 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] [2023-08-26 16:40:32,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 16:40:32,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:40:32,419 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:40:32,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:40:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1872988975, now seen corresponding path program 12 times [2023-08-26 16:40:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:40:32,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683526998] [2023-08-26 16:40:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:40:32,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:40:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:40:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:40:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:40:32,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683526998] [2023-08-26 16:40:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683526998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:40:32,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:40:32,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:40:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983347603] [2023-08-26 16:40:32,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:40:32,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:40:32,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:40:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:40:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:40:32,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:40:32,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1756 transitions, 52849 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:32,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:40:32,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:40:32,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:40:42,117 INFO L124 PetriNetUnfolderBase]: 12832/19246 cut-off events. [2023-08-26 16:40:42,117 INFO L125 PetriNetUnfolderBase]: For 917944/917944 co-relation queries the response was YES. [2023-08-26 16:40:42,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218846 conditions, 19246 events. 12832/19246 cut-off events. For 917944/917944 co-relation queries the response was YES. Maximal size of possible extension queue 1131. Compared 125185 event pairs, 3135 based on Foata normal form. 4/19250 useless extension candidates. Maximal degree in co-relation 218669. Up to 18177 conditions per place. [2023-08-26 16:40:42,429 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1577 selfloop transitions, 197 changer transitions 5/1779 dead transitions. [2023-08-26 16:40:42,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1779 transitions, 56574 flow [2023-08-26 16:40:42,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:40:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:40:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 678 transitions. [2023-08-26 16:40:42,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424812030075188 [2023-08-26 16:40:42,430 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 678 transitions. [2023-08-26 16:40:42,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 678 transitions. [2023-08-26 16:40:42,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:40:42,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 678 transitions. [2023-08-26 16:40:42,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:42,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:42,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:42,433 INFO L175 Difference]: Start difference. First operand has 439 places, 1756 transitions, 52849 flow. Second operand 7 states and 678 transitions. [2023-08-26 16:40:42,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1779 transitions, 56574 flow [2023-08-26 16:40:58,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1779 transitions, 55692 flow, removed 215 selfloop flow, removed 5 redundant places. [2023-08-26 16:40:58,159 INFO L231 Difference]: Finished difference. Result has 442 places, 1756 transitions, 52368 flow [2023-08-26 16:40:58,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=51967, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52368, PETRI_PLACES=442, PETRI_TRANSITIONS=1756} [2023-08-26 16:40:58,160 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 401 predicate places. [2023-08-26 16:40:58,160 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1756 transitions, 52368 flow [2023-08-26 16:40:58,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:58,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:40:58,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:40:58,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-08-26 16:40:58,160 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:40:58,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:40:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1375624529, now seen corresponding path program 13 times [2023-08-26 16:40:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:40:58,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929096616] [2023-08-26 16:40:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:40:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:40:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:40:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:40:58,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:40:58,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929096616] [2023-08-26 16:40:58,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929096616] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:40:58,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:40:58,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:40:58,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153771367] [2023-08-26 16:40:58,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:40:58,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:40:58,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:40:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:40:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:40:58,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:40:58,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1756 transitions, 52368 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:40:58,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:40:58,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:40:58,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:41:07,363 INFO L124 PetriNetUnfolderBase]: 12841/19259 cut-off events. [2023-08-26 16:41:07,363 INFO L125 PetriNetUnfolderBase]: For 904060/904060 co-relation queries the response was YES. [2023-08-26 16:41:07,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216789 conditions, 19259 events. 12841/19259 cut-off events. For 904060/904060 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 125211 event pairs, 3156 based on Foata normal form. 8/19267 useless extension candidates. Maximal degree in co-relation 216611. Up to 18190 conditions per place. [2023-08-26 16:41:07,682 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1582 selfloop transitions, 198 changer transitions 1/1781 dead transitions. [2023-08-26 16:41:07,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1781 transitions, 56221 flow [2023-08-26 16:41:07,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:41:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:41:07,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 676 transitions. [2023-08-26 16:41:07,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42355889724310775 [2023-08-26 16:41:07,684 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 676 transitions. [2023-08-26 16:41:07,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 676 transitions. [2023-08-26 16:41:07,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:41:07,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 676 transitions. [2023-08-26 16:41:07,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.57142857142857) internal successors, (676), 7 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:07,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:07,686 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:07,686 INFO L175 Difference]: Start difference. First operand has 442 places, 1756 transitions, 52368 flow. Second operand 7 states and 676 transitions. [2023-08-26 16:41:07,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1781 transitions, 56221 flow [2023-08-26 16:41:22,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1781 transitions, 55799 flow, removed 16 selfloop flow, removed 4 redundant places. [2023-08-26 16:41:22,859 INFO L231 Difference]: Finished difference. Result has 443 places, 1759 transitions, 52461 flow [2023-08-26 16:41:22,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=51952, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52461, PETRI_PLACES=443, PETRI_TRANSITIONS=1759} [2023-08-26 16:41:22,860 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 402 predicate places. [2023-08-26 16:41:22,861 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 1759 transitions, 52461 flow [2023-08-26 16:41:22,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:22,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:41:22,861 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] [2023-08-26 16:41:22,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-08-26 16:41:22,861 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:41:22,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:41:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1820181299, now seen corresponding path program 14 times [2023-08-26 16:41:22,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:41:22,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103323153] [2023-08-26 16:41:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:41:22,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:41:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:41:22,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:41:22,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:41:22,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103323153] [2023-08-26 16:41:22,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103323153] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:41:22,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:41:22,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:41:22,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174075227] [2023-08-26 16:41:22,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:41:22,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:41:22,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:41:22,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:41:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:41:22,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:41:22,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 1759 transitions, 52461 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:22,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:41:22,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:41:22,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:41:31,903 INFO L124 PetriNetUnfolderBase]: 12853/19281 cut-off events. [2023-08-26 16:41:31,903 INFO L125 PetriNetUnfolderBase]: For 905975/905975 co-relation queries the response was YES. [2023-08-26 16:41:32,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216874 conditions, 19281 events. 12853/19281 cut-off events. For 905975/905975 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 125544 event pairs, 3152 based on Foata normal form. 14/19295 useless extension candidates. Maximal degree in co-relation 216697. Up to 18176 conditions per place. [2023-08-26 16:41:32,214 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1585 selfloop transitions, 202 changer transitions 1/1788 dead transitions. [2023-08-26 16:41:32,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 1788 transitions, 56285 flow [2023-08-26 16:41:32,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:41:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:41:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 682 transitions. [2023-08-26 16:41:32,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273182957393484 [2023-08-26 16:41:32,215 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 682 transitions. [2023-08-26 16:41:32,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 682 transitions. [2023-08-26 16:41:32,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:41:32,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 682 transitions. [2023-08-26 16:41:32,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:32,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:32,217 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:32,217 INFO L175 Difference]: Start difference. First operand has 443 places, 1759 transitions, 52461 flow. Second operand 7 states and 682 transitions. [2023-08-26 16:41:32,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 1788 transitions, 56285 flow [2023-08-26 16:41:47,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 1788 transitions, 56063 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 16:41:47,291 INFO L231 Difference]: Finished difference. Result has 446 places, 1760 transitions, 52693 flow [2023-08-26 16:41:47,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=52239, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52693, PETRI_PLACES=446, PETRI_TRANSITIONS=1760} [2023-08-26 16:41:47,292 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 405 predicate places. [2023-08-26 16:41:47,292 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1760 transitions, 52693 flow [2023-08-26 16:41:47,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:47,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:41:47,292 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] [2023-08-26 16:41:47,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-08-26 16:41:47,292 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:41:47,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:41:47,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1592582047, now seen corresponding path program 15 times [2023-08-26 16:41:47,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:41:47,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218839296] [2023-08-26 16:41:47,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:41:47,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:41:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:41:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:41:47,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:41:47,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218839296] [2023-08-26 16:41:47,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218839296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:41:47,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:41:47,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:41:47,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639713939] [2023-08-26 16:41:47,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:41:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:41:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:41:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:41:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:41:47,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:41:47,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1760 transitions, 52693 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:47,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:41:47,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:41:47,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:41:56,296 INFO L124 PetriNetUnfolderBase]: 12906/19360 cut-off events. [2023-08-26 16:41:56,297 INFO L125 PetriNetUnfolderBase]: For 914641/914641 co-relation queries the response was YES. [2023-08-26 16:41:56,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218047 conditions, 19360 events. 12906/19360 cut-off events. For 914641/914641 co-relation queries the response was YES. Maximal size of possible extension queue 1137. Compared 126073 event pairs, 3173 based on Foata normal form. 24/19384 useless extension candidates. Maximal degree in co-relation 217869. Up to 18221 conditions per place. [2023-08-26 16:41:56,626 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1588 selfloop transitions, 211 changer transitions 1/1800 dead transitions. [2023-08-26 16:41:56,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1800 transitions, 56890 flow [2023-08-26 16:41:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:41:56,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:41:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 684 transitions. [2023-08-26 16:41:56,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-08-26 16:41:56,627 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 684 transitions. [2023-08-26 16:41:56,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 684 transitions. [2023-08-26 16:41:56,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:41:56,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 684 transitions. [2023-08-26 16:41:56,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.71428571428571) internal successors, (684), 7 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:56,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:56,629 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:41:56,629 INFO L175 Difference]: Start difference. First operand has 446 places, 1760 transitions, 52693 flow. Second operand 7 states and 684 transitions. [2023-08-26 16:41:56,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1800 transitions, 56890 flow [2023-08-26 16:42:11,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1800 transitions, 56458 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-08-26 16:42:11,977 INFO L231 Difference]: Finished difference. Result has 448 places, 1771 transitions, 53077 flow [2023-08-26 16:42:11,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=52273, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=53077, PETRI_PLACES=448, PETRI_TRANSITIONS=1771} [2023-08-26 16:42:11,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2023-08-26 16:42:11,978 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 1771 transitions, 53077 flow [2023-08-26 16:42:11,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:11,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:42:11,978 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] [2023-08-26 16:42:11,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-08-26 16:42:11,978 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:42:11,979 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:42:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1034249261, now seen corresponding path program 23 times [2023-08-26 16:42:11,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:42:11,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357751573] [2023-08-26 16:42:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:42:11,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:42:11,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:42:12,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:42:12,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:42:12,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357751573] [2023-08-26 16:42:12,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357751573] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:42:12,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59430629] [2023-08-26 16:42:12,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 16:42:12,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:42:12,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:42:12,084 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:42:12,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 16:42:12,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:42:12,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:42:12,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 16:42:12,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:42:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:42:12,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:42:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:42:12,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59430629] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-26 16:42:12,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-26 16:42:12,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7] total 12 [2023-08-26 16:42:12,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293771973] [2023-08-26 16:42:12,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:42:12,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 16:42:12,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:42:12,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 16:42:12,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-26 16:42:12,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:42:12,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 1771 transitions, 53077 flow. Second operand has 6 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:12,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:42:12,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:42:12,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:42:21,590 INFO L124 PetriNetUnfolderBase]: 12958/19452 cut-off events. [2023-08-26 16:42:21,590 INFO L125 PetriNetUnfolderBase]: For 918744/918744 co-relation queries the response was YES. [2023-08-26 16:42:21,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219306 conditions, 19452 events. 12958/19452 cut-off events. For 918744/918744 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 127073 event pairs, 3043 based on Foata normal form. 18/19470 useless extension candidates. Maximal degree in co-relation 219126. Up to 18122 conditions per place. [2023-08-26 16:42:21,912 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1504 selfloop transitions, 361 changer transitions 0/1865 dead transitions. [2023-08-26 16:42:21,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1865 transitions, 58678 flow [2023-08-26 16:42:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 16:42:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 16:42:21,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 777 transitions. [2023-08-26 16:42:21,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42598684210526316 [2023-08-26 16:42:21,914 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 777 transitions. [2023-08-26 16:42:21,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 777 transitions. [2023-08-26 16:42:21,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:42:21,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 777 transitions. [2023-08-26 16:42:21,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 97.125) internal successors, (777), 8 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:21,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:21,915 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 228.0) internal successors, (2052), 9 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:21,916 INFO L175 Difference]: Start difference. First operand has 448 places, 1771 transitions, 53077 flow. Second operand 8 states and 777 transitions. [2023-08-26 16:42:21,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1865 transitions, 58678 flow [2023-08-26 16:42:37,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1865 transitions, 58414 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-26 16:42:37,629 INFO L231 Difference]: Finished difference. Result has 457 places, 1815 transitions, 55110 flow [2023-08-26 16:42:37,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=52815, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=55110, PETRI_PLACES=457, PETRI_TRANSITIONS=1815} [2023-08-26 16:42:37,630 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2023-08-26 16:42:37,631 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1815 transitions, 55110 flow [2023-08-26 16:42:37,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 91.33333333333333) internal successors, (548), 6 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:37,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:42:37,631 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] [2023-08-26 16:42:37,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-26 16:42:37,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:42:37,836 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:42:37,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:42:37,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1207803025, now seen corresponding path program 24 times [2023-08-26 16:42:37,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:42:37,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856329946] [2023-08-26 16:42:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:42:37,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:42:37,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:42:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:42:37,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:42:37,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856329946] [2023-08-26 16:42:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856329946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:42:37,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683216958] [2023-08-26 16:42:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 16:42:37,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:42:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:42:37,983 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:42:37,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 16:42:38,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-26 16:42:38,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:42:38,109 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:42:38,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:42:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:42:38,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:42:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:42:38,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683216958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:42:38,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:42:38,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2023-08-26 16:42:38,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934096374] [2023-08-26 16:42:38,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:42:38,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 16:42:38,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:42:38,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 16:42:38,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-26 16:42:38,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:42:38,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1815 transitions, 55110 flow. Second operand has 16 states, 16 states have (on average 90.1875) internal successors, (1443), 16 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:38,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:42:38,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:42:38,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:42:48,403 INFO L124 PetriNetUnfolderBase]: 13251/19911 cut-off events. [2023-08-26 16:42:48,403 INFO L125 PetriNetUnfolderBase]: For 962206/962206 co-relation queries the response was YES. [2023-08-26 16:42:48,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226238 conditions, 19911 events. 13251/19911 cut-off events. For 962206/962206 co-relation queries the response was YES. Maximal size of possible extension queue 1175. Compared 130843 event pairs, 2903 based on Foata normal form. 36/19947 useless extension candidates. Maximal degree in co-relation 226053. Up to 17595 conditions per place. [2023-08-26 16:42:48,741 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1462 selfloop transitions, 568 changer transitions 1/2031 dead transitions. [2023-08-26 16:42:48,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 2031 transitions, 62953 flow [2023-08-26 16:42:48,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 16:42:48,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 16:42:48,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2304 transitions. [2023-08-26 16:42:48,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-08-26 16:42:48,743 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2304 transitions. [2023-08-26 16:42:48,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2304 transitions. [2023-08-26 16:42:48,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:42:48,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2304 transitions. [2023-08-26 16:42:48,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 96.0) internal successors, (2304), 24 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:48,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:48,750 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 228.0) internal successors, (5700), 25 states have internal predecessors, (5700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:42:48,750 INFO L175 Difference]: Start difference. First operand has 457 places, 1815 transitions, 55110 flow. Second operand 24 states and 2304 transitions. [2023-08-26 16:42:48,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 2031 transitions, 62953 flow [2023-08-26 16:43:05,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 2031 transitions, 62291 flow, removed 154 selfloop flow, removed 2 redundant places. [2023-08-26 16:43:05,273 INFO L231 Difference]: Finished difference. Result has 490 places, 1928 transitions, 59124 flow [2023-08-26 16:43:05,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=54437, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1809, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=59124, PETRI_PLACES=490, PETRI_TRANSITIONS=1928} [2023-08-26 16:43:05,274 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 449 predicate places. [2023-08-26 16:43:05,274 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1928 transitions, 59124 flow [2023-08-26 16:43:05,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.1875) internal successors, (1443), 16 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:05,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:43:05,274 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] [2023-08-26 16:43:05,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 16:43:05,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-26 16:43:05,475 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:43:05,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:43:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash -244073891, now seen corresponding path program 16 times [2023-08-26 16:43:05,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:43:05,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038409942] [2023-08-26 16:43:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:43:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:43:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:43:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:43:05,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:43:05,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038409942] [2023-08-26 16:43:05,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038409942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:43:05,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:43:05,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:43:05,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933933758] [2023-08-26 16:43:05,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:43:05,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:43:05,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:43:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:43:05,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:43:05,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:43:05,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1928 transitions, 59124 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:05,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:43:05,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:43:05,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:43:16,082 INFO L124 PetriNetUnfolderBase]: 13291/20150 cut-off events. [2023-08-26 16:43:16,083 INFO L125 PetriNetUnfolderBase]: For 984193/984193 co-relation queries the response was YES. [2023-08-26 16:43:16,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230530 conditions, 20150 events. 13291/20150 cut-off events. For 984193/984193 co-relation queries the response was YES. Maximal size of possible extension queue 1202. Compared 134660 event pairs, 3145 based on Foata normal form. 84/20234 useless extension candidates. Maximal degree in co-relation 230334. Up to 18077 conditions per place. [2023-08-26 16:43:16,438 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1711 selfloop transitions, 282 changer transitions 10/2003 dead transitions. [2023-08-26 16:43:16,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 2003 transitions, 63996 flow [2023-08-26 16:43:16,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:43:16,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:43:16,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 683 transitions. [2023-08-26 16:43:16,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42794486215538846 [2023-08-26 16:43:16,439 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 683 transitions. [2023-08-26 16:43:16,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 683 transitions. [2023-08-26 16:43:16,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:43:16,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 683 transitions. [2023-08-26 16:43:16,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.57142857142857) internal successors, (683), 7 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:16,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:16,441 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:16,441 INFO L175 Difference]: Start difference. First operand has 490 places, 1928 transitions, 59124 flow. Second operand 7 states and 683 transitions. [2023-08-26 16:43:16,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 2003 transitions, 63996 flow [2023-08-26 16:43:34,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 2003 transitions, 63499 flow, removed 245 selfloop flow, removed 1 redundant places. [2023-08-26 16:43:34,759 INFO L231 Difference]: Finished difference. Result has 498 places, 1932 transitions, 59422 flow [2023-08-26 16:43:34,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58627, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1928, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59422, PETRI_PLACES=498, PETRI_TRANSITIONS=1932} [2023-08-26 16:43:34,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2023-08-26 16:43:34,761 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1932 transitions, 59422 flow [2023-08-26 16:43:34,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:34,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:43:34,761 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] [2023-08-26 16:43:34,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-26 16:43:34,761 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:43:34,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:43:34,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1728000219, now seen corresponding path program 17 times [2023-08-26 16:43:34,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:43:34,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565977684] [2023-08-26 16:43:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:43:34,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:43:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:43:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:43:34,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:43:34,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565977684] [2023-08-26 16:43:34,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565977684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:43:34,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:43:34,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:43:34,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343425165] [2023-08-26 16:43:34,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:43:34,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:43:34,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:43:34,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:43:34,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:43:34,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:43:34,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1932 transitions, 59422 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:34,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:43:34,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:43:34,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:43:45,517 INFO L124 PetriNetUnfolderBase]: 13272/20108 cut-off events. [2023-08-26 16:43:45,518 INFO L125 PetriNetUnfolderBase]: For 1003960/1003960 co-relation queries the response was YES. [2023-08-26 16:43:45,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232130 conditions, 20108 events. 13272/20108 cut-off events. For 1003960/1003960 co-relation queries the response was YES. Maximal size of possible extension queue 1198. Compared 134225 event pairs, 3341 based on Foata normal form. 8/20116 useless extension candidates. Maximal degree in co-relation 231930. Up to 18984 conditions per place. [2023-08-26 16:43:45,882 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1715 selfloop transitions, 242 changer transitions 1/1958 dead transitions. [2023-08-26 16:43:45,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1958 transitions, 63665 flow [2023-08-26 16:43:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:43:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:43:45,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 674 transitions. [2023-08-26 16:43:45,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4223057644110276 [2023-08-26 16:43:45,883 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 674 transitions. [2023-08-26 16:43:45,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 674 transitions. [2023-08-26 16:43:45,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:43:45,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 674 transitions. [2023-08-26 16:43:45,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.28571428571429) internal successors, (674), 7 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:45,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:45,885 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:43:45,885 INFO L175 Difference]: Start difference. First operand has 498 places, 1932 transitions, 59422 flow. Second operand 7 states and 674 transitions. [2023-08-26 16:43:45,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1958 transitions, 63665 flow [2023-08-26 16:44:05,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1958 transitions, 63049 flow, removed 58 selfloop flow, removed 5 redundant places. [2023-08-26 16:44:05,380 INFO L231 Difference]: Finished difference. Result has 498 places, 1935 transitions, 59421 flow [2023-08-26 16:44:05,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58812, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1932, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59421, PETRI_PLACES=498, PETRI_TRANSITIONS=1935} [2023-08-26 16:44:05,382 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2023-08-26 16:44:05,382 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1935 transitions, 59421 flow [2023-08-26 16:44:05,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:05,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:05,382 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] [2023-08-26 16:44:05,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-26 16:44:05,382 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:44:05,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash -973911471, now seen corresponding path program 18 times [2023-08-26 16:44:05,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:05,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348185088] [2023-08-26 16:44:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:05,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:05,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:05,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348185088] [2023-08-26 16:44:05,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348185088] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:05,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:05,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:44:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599468157] [2023-08-26 16:44:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:05,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:44:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:44:05,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:44:05,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:44:05,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1935 transitions, 59421 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:05,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:05,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:44:05,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:15,936 INFO L124 PetriNetUnfolderBase]: 13150/19870 cut-off events. [2023-08-26 16:44:15,936 INFO L125 PetriNetUnfolderBase]: For 989776/989776 co-relation queries the response was YES. [2023-08-26 16:44:16,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229293 conditions, 19870 events. 13150/19870 cut-off events. For 989776/989776 co-relation queries the response was YES. Maximal size of possible extension queue 1187. Compared 131721 event pairs, 3087 based on Foata normal form. 98/19968 useless extension candidates. Maximal degree in co-relation 229095. Up to 18203 conditions per place. [2023-08-26 16:44:16,290 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1695 selfloop transitions, 296 changer transitions 1/1992 dead transitions. [2023-08-26 16:44:16,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1992 transitions, 63977 flow [2023-08-26 16:44:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:44:16,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:44:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 683 transitions. [2023-08-26 16:44:16,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42794486215538846 [2023-08-26 16:44:16,292 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 683 transitions. [2023-08-26 16:44:16,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 683 transitions. [2023-08-26 16:44:16,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:16,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 683 transitions. [2023-08-26 16:44:16,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.57142857142857) internal successors, (683), 7 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:16,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:16,293 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:16,293 INFO L175 Difference]: Start difference. First operand has 498 places, 1935 transitions, 59421 flow. Second operand 7 states and 683 transitions. [2023-08-26 16:44:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1992 transitions, 63977 flow [2023-08-26 16:44:34,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1992 transitions, 63440 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-08-26 16:44:34,765 INFO L231 Difference]: Finished difference. Result has 499 places, 1941 transitions, 59691 flow [2023-08-26 16:44:34,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58894, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1935, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1639, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59691, PETRI_PLACES=499, PETRI_TRANSITIONS=1941} [2023-08-26 16:44:34,767 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2023-08-26 16:44:34,767 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1941 transitions, 59691 flow [2023-08-26 16:44:34,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:34,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:44:34,767 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] [2023-08-26 16:44:34,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-08-26 16:44:34,767 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:44:34,768 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:44:34,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2051284075, now seen corresponding path program 19 times [2023-08-26 16:44:34,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:44:34,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15212057] [2023-08-26 16:44:34,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:44:34,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:44:34,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:44:34,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:44:34,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:44:34,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15212057] [2023-08-26 16:44:34,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15212057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:44:34,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:44:34,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:44:34,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127755193] [2023-08-26 16:44:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:44:34,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:44:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:44:34,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:44:34,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:44:34,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:44:34,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1941 transitions, 59691 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:34,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:44:34,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:44:34,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:44:46,211 INFO L124 PetriNetUnfolderBase]: 13150/19862 cut-off events. [2023-08-26 16:44:46,211 INFO L125 PetriNetUnfolderBase]: For 992403/992403 co-relation queries the response was YES. [2023-08-26 16:44:46,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229778 conditions, 19862 events. 13150/19862 cut-off events. For 992403/992403 co-relation queries the response was YES. Maximal size of possible extension queue 1189. Compared 131618 event pairs, 3236 based on Foata normal form. 10/19872 useless extension candidates. Maximal degree in co-relation 229580. Up to 18720 conditions per place. [2023-08-26 16:44:46,695 INFO L140 encePairwiseOnDemand]: 220/228 looper letters, 1728 selfloop transitions, 247 changer transitions 1/1976 dead transitions. [2023-08-26 16:44:46,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1976 transitions, 63996 flow [2023-08-26 16:44:46,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:44:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:44:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 672 transitions. [2023-08-26 16:44:46,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2023-08-26 16:44:46,697 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 672 transitions. [2023-08-26 16:44:46,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 672 transitions. [2023-08-26 16:44:46,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:44:46,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 672 transitions. [2023-08-26 16:44:46,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 96.0) internal successors, (672), 7 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:46,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:46,715 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:44:46,715 INFO L175 Difference]: Start difference. First operand has 499 places, 1941 transitions, 59691 flow. Second operand 7 states and 672 transitions. [2023-08-26 16:44:46,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1976 transitions, 63996 flow [2023-08-26 16:45:06,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1976 transitions, 63356 flow, removed 34 selfloop flow, removed 6 redundant places. [2023-08-26 16:45:06,490 INFO L231 Difference]: Finished difference. Result has 499 places, 1946 transitions, 59691 flow [2023-08-26 16:45:06,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=58919, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1937, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1693, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=59691, PETRI_PLACES=499, PETRI_TRANSITIONS=1946} [2023-08-26 16:45:06,492 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2023-08-26 16:45:06,492 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 1946 transitions, 59691 flow [2023-08-26 16:45:06,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:06,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:45:06,492 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] [2023-08-26 16:45:06,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-08-26 16:45:06,492 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:45:06,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:45:06,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1965309905, now seen corresponding path program 20 times [2023-08-26 16:45:06,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:45:06,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388956133] [2023-08-26 16:45:06,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:45:06,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:45:06,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:45:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:45:06,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:45:06,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388956133] [2023-08-26 16:45:06,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388956133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:45:06,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:45:06,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:45:06,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27239965] [2023-08-26 16:45:06,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:45:06,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:45:06,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:45:06,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:45:06,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:45:06,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:45:06,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 1946 transitions, 59691 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:06,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:45:06,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:45:06,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:45:17,575 INFO L124 PetriNetUnfolderBase]: 13212/19940 cut-off events. [2023-08-26 16:45:17,575 INFO L125 PetriNetUnfolderBase]: For 993024/993024 co-relation queries the response was YES. [2023-08-26 16:45:17,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230477 conditions, 19940 events. 13212/19940 cut-off events. For 993024/993024 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 131932 event pairs, 3214 based on Foata normal form. 28/19968 useless extension candidates. Maximal degree in co-relation 230280. Up to 18531 conditions per place. [2023-08-26 16:45:17,929 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1721 selfloop transitions, 270 changer transitions 1/1992 dead transitions. [2023-08-26 16:45:17,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 1992 transitions, 64394 flow [2023-08-26 16:45:17,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:45:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:45:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 682 transitions. [2023-08-26 16:45:17,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273182957393484 [2023-08-26 16:45:17,930 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 682 transitions. [2023-08-26 16:45:17,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 682 transitions. [2023-08-26 16:45:17,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:45:17,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 682 transitions. [2023-08-26 16:45:17,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.42857142857143) internal successors, (682), 7 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:17,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:17,932 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:17,932 INFO L175 Difference]: Start difference. First operand has 499 places, 1946 transitions, 59691 flow. Second operand 7 states and 682 transitions. [2023-08-26 16:45:17,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 1992 transitions, 64394 flow [2023-08-26 16:45:38,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 1992 transitions, 64045 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-26 16:45:38,414 INFO L231 Difference]: Finished difference. Result has 503 places, 1958 transitions, 60426 flow [2023-08-26 16:45:38,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=59280, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=60426, PETRI_PLACES=503, PETRI_TRANSITIONS=1958} [2023-08-26 16:45:38,416 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 462 predicate places. [2023-08-26 16:45:38,416 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 1958 transitions, 60426 flow [2023-08-26 16:45:38,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:38,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:45:38,416 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] [2023-08-26 16:45:38,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-08-26 16:45:38,416 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:45:38,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:45:38,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1030338693, now seen corresponding path program 25 times [2023-08-26 16:45:38,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:45:38,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767729885] [2023-08-26 16:45:38,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:45:38,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:45:38,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:45:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:45:38,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:45:38,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767729885] [2023-08-26 16:45:38,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767729885] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 16:45:38,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 16:45:38,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-26 16:45:38,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287183651] [2023-08-26 16:45:38,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 16:45:38,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 16:45:38,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:45:38,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 16:45:38,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 16:45:38,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:45:38,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 1958 transitions, 60426 flow. Second operand has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:38,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:45:38,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:45:38,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:45:49,269 INFO L124 PetriNetUnfolderBase]: 13155/19799 cut-off events. [2023-08-26 16:45:49,270 INFO L125 PetriNetUnfolderBase]: For 1008187/1008187 co-relation queries the response was YES. [2023-08-26 16:45:49,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229930 conditions, 19799 events. 13155/19799 cut-off events. For 1008187/1008187 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 130443 event pairs, 2976 based on Foata normal form. 48/19847 useless extension candidates. Maximal degree in co-relation 229731. Up to 17547 conditions per place. [2023-08-26 16:45:49,874 INFO L140 encePairwiseOnDemand]: 219/228 looper letters, 1641 selfloop transitions, 397 changer transitions 1/2039 dead transitions. [2023-08-26 16:45:49,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 2039 transitions, 65831 flow [2023-08-26 16:45:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 16:45:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 16:45:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 687 transitions. [2023-08-26 16:45:49,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43045112781954886 [2023-08-26 16:45:49,876 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 687 transitions. [2023-08-26 16:45:49,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 687 transitions. [2023-08-26 16:45:49,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:45:49,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 687 transitions. [2023-08-26 16:45:49,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 98.14285714285714) internal successors, (687), 7 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:49,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:49,877 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 228.0) internal successors, (1824), 8 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:45:49,877 INFO L175 Difference]: Start difference. First operand has 503 places, 1958 transitions, 60426 flow. Second operand 7 states and 687 transitions. [2023-08-26 16:45:49,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 2039 transitions, 65831 flow [2023-08-26 16:46:09,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 2039 transitions, 65413 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 16:46:09,233 INFO L231 Difference]: Finished difference. Result has 507 places, 1958 transitions, 60833 flow [2023-08-26 16:46:09,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=60008, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=60833, PETRI_PLACES=507, PETRI_TRANSITIONS=1958} [2023-08-26 16:46:09,234 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 466 predicate places. [2023-08-26 16:46:09,234 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1958 transitions, 60833 flow [2023-08-26 16:46:09,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.85714285714286) internal successors, (636), 7 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:09,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:46:09,235 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] [2023-08-26 16:46:09,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-08-26 16:46:09,235 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:46:09,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:46:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash 166190569, now seen corresponding path program 26 times [2023-08-26 16:46:09,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:46:09,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746781286] [2023-08-26 16:46:09,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:46:09,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:46:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:46:09,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:09,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:46:09,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746781286] [2023-08-26 16:46:09,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746781286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:46:09,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367438685] [2023-08-26 16:46:09,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:46:09,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:46:09,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:46:09,355 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:46:09,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 16:46:09,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:46:09,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:46:09,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-26 16:46:09,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:46:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:09,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:46:09,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:09,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367438685] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:46:09,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:46:09,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2023-08-26 16:46:09,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548246249] [2023-08-26 16:46:09,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:46:09,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 16:46:09,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:46:09,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 16:46:09,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-08-26 16:46:09,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 228 [2023-08-26 16:46:09,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1958 transitions, 60833 flow. Second operand has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 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 16:46:09,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:46:09,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 228 [2023-08-26 16:46:09,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:46:22,099 INFO L124 PetriNetUnfolderBase]: 15063/22507 cut-off events. [2023-08-26 16:46:22,099 INFO L125 PetriNetUnfolderBase]: For 1125853/1125853 co-relation queries the response was YES. [2023-08-26 16:46:22,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259474 conditions, 22507 events. 15063/22507 cut-off events. For 1125853/1125853 co-relation queries the response was YES. Maximal size of possible extension queue 1331. Compared 149107 event pairs, 1679 based on Foata normal form. 20/22527 useless extension candidates. Maximal degree in co-relation 259274. Up to 9419 conditions per place. [2023-08-26 16:46:22,657 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 1125 selfloop transitions, 1317 changer transitions 1/2443 dead transitions. [2023-08-26 16:46:22,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 2443 transitions, 75988 flow [2023-08-26 16:46:22,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 16:46:22,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 16:46:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2127 transitions. [2023-08-26 16:46:22,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42404306220095694 [2023-08-26 16:46:22,659 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2127 transitions. [2023-08-26 16:46:22,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2127 transitions. [2023-08-26 16:46:22,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:46:22,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2127 transitions. [2023-08-26 16:46:22,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 96.68181818181819) internal successors, (2127), 22 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:22,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 228.0) internal successors, (5244), 23 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:22,663 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 228.0) internal successors, (5244), 23 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:22,663 INFO L175 Difference]: Start difference. First operand has 507 places, 1958 transitions, 60833 flow. Second operand 22 states and 2127 transitions. [2023-08-26 16:46:22,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 2443 transitions, 75988 flow [2023-08-26 16:46:47,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 2443 transitions, 75072 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-26 16:46:47,077 INFO L231 Difference]: Finished difference. Result has 536 places, 2178 transitions, 71125 flow [2023-08-26 16:46:47,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=228, PETRI_DIFFERENCE_MINUEND_FLOW=60048, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=742, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=71125, PETRI_PLACES=536, PETRI_TRANSITIONS=2178} [2023-08-26 16:46:47,079 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 495 predicate places. [2023-08-26 16:46:47,079 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 2178 transitions, 71125 flow [2023-08-26 16:46:47,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 90.125) internal successors, (1442), 16 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 16:46:47,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 16:46:47,080 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] [2023-08-26 16:46:47,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 16:46:47,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:46:47,288 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 16:46:47,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 16:46:47,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1571598953, now seen corresponding path program 8 times [2023-08-26 16:46:47,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 16:46:47,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11466689] [2023-08-26 16:46:47,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 16:46:47,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 16:46:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 16:46:47,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:47,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 16:46:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11466689] [2023-08-26 16:46:47,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11466689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 16:46:47,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118333850] [2023-08-26 16:46:47,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 16:46:47,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:46:47,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 16:46:47,411 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 16:46:47,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 16:46:47,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 16:46:47,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 16:46:47,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 16:46:47,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 16:46:47,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:47,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 16:46:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 16:46:47,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118333850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 16:46:47,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 16:46:47,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-26 16:46:47,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536415026] [2023-08-26 16:46:47,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 16:46:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-26 16:46:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 16:46:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-26 16:46:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2023-08-26 16:46:47,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 228 [2023-08-26 16:46:47,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 2178 transitions, 71125 flow. Second operand has 18 states, 18 states have (on average 85.5) internal successors, (1539), 18 states have internal predecessors, (1539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:46:47,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 16:46:47,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 228 [2023-08-26 16:46:47,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 16:47:02,634 INFO L124 PetriNetUnfolderBase]: 16490/24608 cut-off events. [2023-08-26 16:47:02,634 INFO L125 PetriNetUnfolderBase]: For 1368370/1368370 co-relation queries the response was YES. [2023-08-26 16:47:03,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296152 conditions, 24608 events. 16490/24608 cut-off events. For 1368370/1368370 co-relation queries the response was YES. Maximal size of possible extension queue 1439. Compared 164572 event pairs, 1404 based on Foata normal form. 8/24616 useless extension candidates. Maximal degree in co-relation 295941. Up to 11235 conditions per place. [2023-08-26 16:47:03,293 INFO L140 encePairwiseOnDemand]: 218/228 looper letters, 1653 selfloop transitions, 782 changer transitions 1/2436 dead transitions. [2023-08-26 16:47:03,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 2436 transitions, 81578 flow [2023-08-26 16:47:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 16:47:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 16:47:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1476 transitions. [2023-08-26 16:47:03,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40460526315789475 [2023-08-26 16:47:03,294 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1476 transitions. [2023-08-26 16:47:03,294 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1476 transitions. [2023-08-26 16:47:03,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 16:47:03,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1476 transitions. [2023-08-26 16:47:03,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 92.25) internal successors, (1476), 16 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:03,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:03,298 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 228.0) internal successors, (3876), 17 states have internal predecessors, (3876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 16:47:03,298 INFO L175 Difference]: Start difference. First operand has 536 places, 2178 transitions, 71125 flow. Second operand 16 states and 1476 transitions. [2023-08-26 16:47:03,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 2436 transitions, 81578 flow Received shutdown request... [2023-08-26 16:47:23,279 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (15 of 16 remaining) [2023-08-26 16:47:23,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 16:47:23,286 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 16:47:23,286 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 16:47:23,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 16:47:23,480 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 16:47:23,481 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 16:47:23,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 16:47:23,483 INFO L445 BasicCegarLoop]: Path program histogram: [26, 20, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 16:47:23,485 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 16:47:23,485 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 16:47:23,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:47:23 BasicIcfg [2023-08-26 16:47:23,487 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 16:47:23,487 INFO L158 Benchmark]: Toolchain (without parser) took 799732.03ms. Allocated memory was 373.3MB in the beginning and 13.7GB in the end (delta: 13.4GB). Free memory was 350.5MB in the beginning and 8.6GB in the end (delta: -8.3GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. [2023-08-26 16:47:23,487 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 350.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:47:23,488 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.42ms. Allocated memory is still 373.3MB. Free memory was 350.0MB in the beginning and 339.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 16:47:23,488 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.81ms. Allocated memory is still 373.3MB. Free memory was 339.4MB in the beginning and 338.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 16:47:23,488 INFO L158 Benchmark]: Boogie Preprocessor took 32.79ms. Allocated memory is still 373.3MB. Free memory was 338.0MB in the beginning and 336.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 16:47:23,488 INFO L158 Benchmark]: RCFGBuilder took 378.64ms. Allocated memory is still 373.3MB. Free memory was 336.5MB in the beginning and 320.7MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-26 16:47:23,488 INFO L158 Benchmark]: TraceAbstraction took 799022.63ms. Allocated memory was 373.3MB in the beginning and 13.7GB in the end (delta: 13.4GB). Free memory was 320.2MB in the beginning and 8.6GB in the end (delta: -8.3GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. [2023-08-26 16:47:23,489 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 373.3MB. Free memory is still 350.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 250.42ms. Allocated memory is still 373.3MB. Free memory was 350.0MB in the beginning and 339.4MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.81ms. Allocated memory is still 373.3MB. Free memory was 339.4MB in the beginning and 338.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.79ms. Allocated memory is still 373.3MB. Free memory was 338.0MB in the beginning and 336.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 378.64ms. Allocated memory is still 373.3MB. Free memory was 336.5MB in the beginning and 320.7MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 799022.63ms. Allocated memory was 373.3MB in the beginning and 13.7GB in the end (delta: 13.4GB). Free memory was 320.2MB in the beginning and 8.6GB in the end (delta: -8.3GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 110 PlacesBefore, 41 PlacesAfterwards, 107 TransitionsBefore, 34 TransitionsAfterwards, 1914 CoEnabledTransitionPairs, 6 FixpointIterations, 48 TrivialSequentialCompositions, 46 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 6 ConcurrentYvCompositions, 4 ChoiceCompositions, 107 TotalNumberOfCompositions, 1930 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1930, independent: 1930, independent conditional: 0, independent unconditional: 1930, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 975, independent: 975, independent conditional: 0, independent unconditional: 975, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1930, independent: 955, independent conditional: 0, independent unconditional: 955, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 975, unknown conditional: 0, unknown unconditional: 975] , Statistics on independence cache: Total cache size (in pairs): 66, Positive cache size: 66, Positive conditional cache size: 0, Positive unconditional cache size: 66, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 148 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 798.9s, OverallIterations: 62, TraceHistogramMax: 1, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 771.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2936 SdHoareTripleChecker+Valid, 12.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2936 mSDsluCounter, 1568 SdHoareTripleChecker+Invalid, 10.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1116 mSDsCounter, 163 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18457 IncrementalHoareTripleChecker+Invalid, 18620 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 163 mSolverCounterUnsat, 452 mSDtfsCounter, 18457 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1397 GetRequests, 789 SyntacticMatches, 27 SemanticMatches, 581 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2050 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71125occurred in iteration=61, InterpolantAutomatonStates: 551, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 15.1s InterpolantComputationTime, 1570 NumberOfCodeBlocks, 1570 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 1904 ConstructedInterpolants, 0 QuantifiedInterpolants, 11154 SizeOfPredicates, 112 NumberOfNonLiveVariables, 3938 ConjunctsInSsa, 302 ConjunctsInUnsatCore, 106 InterpolantComputations, 50 PerfectInterpolantSequences, 42/98 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown [2023-08-26 16:47:23,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0