/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/test-easy7.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:20:57,974 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:20:58,040 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 20:20:58,045 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:20:58,045 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:20:58,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:20:58,068 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:20:58,068 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:20:58,069 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:20:58,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:20:58,071 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:20:58,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:20:58,072 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:20:58,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:20:58,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:20:58,073 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:20:58,073 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:20:58,074 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:20:58,074 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:20:58,074 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:20:58,074 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:20:58,075 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:20:58,075 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:20:58,075 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:20:58,075 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:20:58,075 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:20:58,076 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:20:58,076 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:58,076 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:20:58,076 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:20:58,077 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:20:58,077 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:20:58,077 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:20:58,077 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:20:58,077 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:20:58,077 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 20:20:58,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:20:58,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:20:58,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:20:58,333 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:20:58,334 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:20:58,335 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy7.wvr.c [2023-08-26 20:20:59,305 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:20:59,475 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:20:59,476 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy7.wvr.c [2023-08-26 20:20:59,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b3b2216e/7c7797b3b5fb41e5a2bc3f2c0d505eb8/FLAGfd695ddac [2023-08-26 20:20:59,492 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b3b2216e/7c7797b3b5fb41e5a2bc3f2c0d505eb8 [2023-08-26 20:20:59,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:20:59,497 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:20:59,497 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:59,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:20:59,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:20:59,500 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40c5e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59, skipping insertion in model container [2023-08-26 20:20:59,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,512 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:20:59,621 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:59,628 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:20:59,649 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:20:59,660 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:20:59,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59 WrapperNode [2023-08-26 20:20:59,661 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:20:59,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:59,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:20:59,662 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:20:59,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,676 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,692 INFO L138 Inliner]: procedures = 21, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 58 [2023-08-26 20:20:59,692 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:20:59,693 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:20:59,693 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:20:59,693 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:20:59,698 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,719 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,721 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:20:59,722 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:20:59,722 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:20:59,722 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:20:59,723 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (1/1) ... [2023-08-26 20:20:59,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:20:59,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:20:59,742 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 20:20:59,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 20:20:59,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:20:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 20:20:59,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 20:20:59,771 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 20:20:59,771 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 20:20:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:20:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:20:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:20:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:20:59,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:20:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 20:20:59,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:20:59,773 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 20:20:59,844 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:20:59,846 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:20:59,972 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:20:59,977 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:20:59,977 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 20:20:59,978 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:59 BoogieIcfgContainer [2023-08-26 20:20:59,978 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:20:59,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:20:59,980 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:20:59,982 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:20:59,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:20:59" (1/3) ... [2023-08-26 20:20:59,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6366bf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:59, skipping insertion in model container [2023-08-26 20:20:59,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:20:59" (2/3) ... [2023-08-26 20:20:59,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6366bf12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:20:59, skipping insertion in model container [2023-08-26 20:20:59,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:20:59" (3/3) ... [2023-08-26 20:20:59,984 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy7.wvr.c [2023-08-26 20:20:59,994 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:20:59,994 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-26 20:20:59,995 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:21:00,033 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 20:21:00,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 98 transitions, 212 flow [2023-08-26 20:21:00,085 INFO L124 PetriNetUnfolderBase]: 2/96 cut-off events. [2023-08-26 20:21:00,085 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:21:00,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 96 events. 2/96 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 0 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 20:21:00,088 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 98 transitions, 212 flow [2023-08-26 20:21:00,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 87 transitions, 186 flow [2023-08-26 20:21:00,093 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:21:00,098 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 87 transitions, 186 flow [2023-08-26 20:21:00,100 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 87 transitions, 186 flow [2023-08-26 20:21:00,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 87 transitions, 186 flow [2023-08-26 20:21:00,118 INFO L124 PetriNetUnfolderBase]: 2/87 cut-off events. [2023-08-26 20:21:00,118 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:21:00,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 2/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 20:21:00,119 INFO L119 LiptonReduction]: Number of co-enabled transitions 1036 [2023-08-26 20:21:02,119 INFO L134 LiptonReduction]: Checked pairs total: 936 [2023-08-26 20:21:02,119 INFO L136 LiptonReduction]: Total number of compositions: 92 [2023-08-26 20:21:02,128 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:21:02,132 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;@6198e03e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:21:02,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 20:21:02,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:21:02,134 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 20:21:02,134 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:02,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:02,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 20:21:02,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:02,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:02,138 INFO L85 PathProgramCache]: Analyzing trace with hash 358, now seen corresponding path program 1 times [2023-08-26 20:21:02,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:02,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763993749] [2023-08-26 20:21:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:02,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:02,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:02,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:02,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763993749] [2023-08-26 20:21:02,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763993749] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:02,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:02,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 20:21:02,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506115091] [2023-08-26 20:21:02,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:02,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:21:02,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:02,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:21:02,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:21:02,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 190 [2023-08-26 20:21:02,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 19 transitions, 50 flow. Second operand has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:02,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 190 [2023-08-26 20:21:02,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:02,262 INFO L124 PetriNetUnfolderBase]: 21/56 cut-off events. [2023-08-26 20:21:02,262 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 20:21:02,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 56 events. 21/56 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 131 event pairs, 21 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 84. Up to 57 conditions per place. [2023-08-26 20:21:02,265 INFO L140 encePairwiseOnDemand]: 188/190 looper letters, 17 selfloop transitions, 0 changer transitions 0/17 dead transitions. [2023-08-26 20:21:02,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 17 transitions, 80 flow [2023-08-26 20:21:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:21:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:21:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 201 transitions. [2023-08-26 20:21:02,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289473684210526 [2023-08-26 20:21:02,276 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 201 transitions. [2023-08-26 20:21:02,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 201 transitions. [2023-08-26 20:21:02,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:02,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 201 transitions. [2023-08-26 20:21:02,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 100.5) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,287 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,288 INFO L175 Difference]: Start difference. First operand has 26 places, 19 transitions, 50 flow. Second operand 2 states and 201 transitions. [2023-08-26 20:21:02,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 17 transitions, 80 flow [2023-08-26 20:21:02,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 20:21:02,291 INFO L231 Difference]: Finished difference. Result has 21 places, 17 transitions, 38 flow [2023-08-26 20:21:02,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=17} [2023-08-26 20:21:02,296 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 20:21:02,296 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 17 transitions, 38 flow [2023-08-26 20:21:02,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 91.5) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:02,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:21:02,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:21:02,297 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:02,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:02,298 INFO L85 PathProgramCache]: Analyzing trace with hash 352552, now seen corresponding path program 1 times [2023-08-26 20:21:02,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:02,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178658058] [2023-08-26 20:21:02,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:02,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:02,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:02,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:02,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:02,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178658058] [2023-08-26 20:21:02,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178658058] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:02,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:02,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:21:02,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940064631] [2023-08-26 20:21:02,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:02,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:21:02,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:02,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:21:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:21:02,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 190 [2023-08-26 20:21:02,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:02,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 190 [2023-08-26 20:21:02,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:02,418 INFO L124 PetriNetUnfolderBase]: 19/50 cut-off events. [2023-08-26 20:21:02,418 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:21:02,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 50 events. 19/50 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 112 event pairs, 19 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 103. Up to 50 conditions per place. [2023-08-26 20:21:02,419 INFO L140 encePairwiseOnDemand]: 187/190 looper letters, 14 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2023-08-26 20:21:02,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 64 flow [2023-08-26 20:21:02,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:02,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-26 20:21:02,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087719298245614 [2023-08-26 20:21:02,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-26 20:21:02,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-26 20:21:02,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:02,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-26 20:21:02,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,428 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 38 flow. Second operand 3 states and 233 transitions. [2023-08-26 20:21:02,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 64 flow [2023-08-26 20:21:02,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:21:02,428 INFO L231 Difference]: Finished difference. Result has 21 places, 15 transitions, 36 flow [2023-08-26 20:21:02,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=21, PETRI_TRANSITIONS=15} [2023-08-26 20:21:02,429 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 20:21:02,429 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 15 transitions, 36 flow [2023-08-26 20:21:02,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:02,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 20:21:02,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:21:02,430 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:02,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:02,431 INFO L85 PathProgramCache]: Analyzing trace with hash 352553, now seen corresponding path program 1 times [2023-08-26 20:21:02,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:02,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815166147] [2023-08-26 20:21:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:02,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815166147] [2023-08-26 20:21:02,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815166147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:02,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:21:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848717461] [2023-08-26 20:21:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:02,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:21:02,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:21:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:21:02,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 190 [2023-08-26 20:21:02,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:02,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 190 [2023-08-26 20:21:02,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:02,523 INFO L124 PetriNetUnfolderBase]: 17/44 cut-off events. [2023-08-26 20:21:02,523 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:21:02,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 44 events. 17/44 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 91 event pairs, 17 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 92. Up to 44 conditions per place. [2023-08-26 20:21:02,524 INFO L140 encePairwiseOnDemand]: 187/190 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 20:21:02,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 13 transitions, 58 flow [2023-08-26 20:21:02,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:02,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 237 transitions. [2023-08-26 20:21:02,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41578947368421054 [2023-08-26 20:21:02,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 237 transitions. [2023-08-26 20:21:02,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 237 transitions. [2023-08-26 20:21:02,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:02,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 237 transitions. [2023-08-26 20:21:02,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,527 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,527 INFO L175 Difference]: Start difference. First operand has 21 places, 15 transitions, 36 flow. Second operand 3 states and 237 transitions. [2023-08-26 20:21:02,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 13 transitions, 58 flow [2023-08-26 20:21:02,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 13 transitions, 57 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:02,528 INFO L231 Difference]: Finished difference. Result has 20 places, 13 transitions, 33 flow [2023-08-26 20:21:02,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=31, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=33, PETRI_PLACES=20, PETRI_TRANSITIONS=13} [2023-08-26 20:21:02,528 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 20:21:02,528 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 13 transitions, 33 flow [2023-08-26 20:21:02,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:02,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:21:02,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:21:02,529 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:02,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:02,529 INFO L85 PathProgramCache]: Analyzing trace with hash 338808996, now seen corresponding path program 1 times [2023-08-26 20:21:02,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727062417] [2023-08-26 20:21:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:02,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:02,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:02,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:02,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727062417] [2023-08-26 20:21:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727062417] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:02,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:02,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:02,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761416999] [2023-08-26 20:21:02,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:02,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:02,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:02,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:02,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:02,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 190 [2023-08-26 20:21:02,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 13 transitions, 33 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 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 20:21:02,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:02,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 190 [2023-08-26 20:21:02,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:02,665 INFO L124 PetriNetUnfolderBase]: 13/36 cut-off events. [2023-08-26 20:21:02,665 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:21:02,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 36 events. 13/36 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 61 event pairs, 13 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 77. Up to 36 conditions per place. [2023-08-26 20:21:02,666 INFO L140 encePairwiseOnDemand]: 188/190 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 20:21:02,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 12 transitions, 55 flow [2023-08-26 20:21:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 223 transitions. [2023-08-26 20:21:02,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912280701754386 [2023-08-26 20:21:02,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 223 transitions. [2023-08-26 20:21:02,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 223 transitions. [2023-08-26 20:21:02,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:02,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 223 transitions. [2023-08-26 20:21:02,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,670 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,670 INFO L175 Difference]: Start difference. First operand has 20 places, 13 transitions, 33 flow. Second operand 3 states and 223 transitions. [2023-08-26 20:21:02,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 12 transitions, 55 flow [2023-08-26 20:21:02,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 12 transitions, 54 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:02,671 INFO L231 Difference]: Finished difference. Result has 20 places, 12 transitions, 32 flow [2023-08-26 20:21:02,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=20, PETRI_TRANSITIONS=12} [2023-08-26 20:21:02,672 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 20:21:02,672 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 12 transitions, 32 flow [2023-08-26 20:21:02,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 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 20:21:02,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:02,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 20:21:02,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:21:02,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:02,673 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash 338808995, now seen corresponding path program 1 times [2023-08-26 20:21:02,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:02,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890707961] [2023-08-26 20:21:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:02,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890707961] [2023-08-26 20:21:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890707961] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:02,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:02,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:02,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26786958] [2023-08-26 20:21:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:02,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:02,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:02,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:02,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-26 20:21:02,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 12 transitions, 32 flow. Second operand has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:02,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-26 20:21:02,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:02,749 INFO L124 PetriNetUnfolderBase]: 9/28 cut-off events. [2023-08-26 20:21:02,749 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:21:02,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66 conditions, 28 events. 9/28 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 33 event pairs, 9 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 62. Up to 28 conditions per place. [2023-08-26 20:21:02,750 INFO L140 encePairwiseOnDemand]: 188/190 looper letters, 10 selfloop transitions, 1 changer transitions 0/11 dead transitions. [2023-08-26 20:21:02,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 11 transitions, 52 flow [2023-08-26 20:21:02,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:21:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:21:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 219 transitions. [2023-08-26 20:21:02,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38421052631578945 [2023-08-26 20:21:02,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 219 transitions. [2023-08-26 20:21:02,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 219 transitions. [2023-08-26 20:21:02,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:02,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 219 transitions. [2023-08-26 20:21:02,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,753 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,753 INFO L175 Difference]: Start difference. First operand has 20 places, 12 transitions, 32 flow. Second operand 3 states and 219 transitions. [2023-08-26 20:21:02,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 11 transitions, 52 flow [2023-08-26 20:21:02,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 11 transitions, 51 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:02,753 INFO L231 Difference]: Finished difference. Result has 20 places, 11 transitions, 31 flow [2023-08-26 20:21:02,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=20, PETRI_TRANSITIONS=11} [2023-08-26 20:21:02,754 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -6 predicate places. [2023-08-26 20:21:02,754 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 11 transitions, 31 flow [2023-08-26 20:21:02,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.25) internal successors, (281), 4 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:02,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:02,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:21:02,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:21:02,755 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:02,755 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2085524811, now seen corresponding path program 1 times [2023-08-26 20:21:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:02,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528386470] [2023-08-26 20:21:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:02,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:02,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528386470] [2023-08-26 20:21:02,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528386470] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:02,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:02,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:02,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358745125] [2023-08-26 20:21:02,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:02,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:02,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-26 20:21:02,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 11 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 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 20:21:02,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:02,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-26 20:21:02,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:03,005 INFO L124 PetriNetUnfolderBase]: 8/32 cut-off events. [2023-08-26 20:21:03,005 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:21:03,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 32 events. 8/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 55 event pairs, 1 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 71. Up to 13 conditions per place. [2023-08-26 20:21:03,006 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 10 selfloop transitions, 2 changer transitions 10/22 dead transitions. [2023-08-26 20:21:03,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 101 flow [2023-08-26 20:21:03,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:21:03,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:21:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2023-08-26 20:21:03,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39342105263157895 [2023-08-26 20:21:03,007 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2023-08-26 20:21:03,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2023-08-26 20:21:03,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:03,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2023-08-26 20:21:03,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:03,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:03,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:03,010 INFO L175 Difference]: Start difference. First operand has 20 places, 11 transitions, 31 flow. Second operand 4 states and 299 transitions. [2023-08-26 20:21:03,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 101 flow [2023-08-26 20:21:03,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 22 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 20:21:03,011 INFO L231 Difference]: Finished difference. Result has 23 places, 11 transitions, 40 flow [2023-08-26 20:21:03,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=40, PETRI_PLACES=23, PETRI_TRANSITIONS=11} [2023-08-26 20:21:03,013 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -3 predicate places. [2023-08-26 20:21:03,015 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 11 transitions, 40 flow [2023-08-26 20:21:03,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 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 20:21:03,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:21:03,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:21:03,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:21:03,016 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 20:21:03,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:21:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash 727549523, now seen corresponding path program 2 times [2023-08-26 20:21:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:21:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430388225] [2023-08-26 20:21:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:21:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:21:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:21:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:21:03,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:21:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430388225] [2023-08-26 20:21:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430388225] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:21:03,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:21:03,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:21:03,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539984516] [2023-08-26 20:21:03,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:21:03,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 20:21:03,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:21:03,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 20:21:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 20:21:03,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-26 20:21:03,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 11 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 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 20:21:03,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:21:03,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-26 20:21:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:21:03,185 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-26 20:21:03,185 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:21:03,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 14 events. 2/14 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 1 based on Foata normal form. 1/15 useless extension candidates. Maximal degree in co-relation 41. Up to 11 conditions per place. [2023-08-26 20:21:03,186 INFO L140 encePairwiseOnDemand]: 186/190 looper letters, 0 selfloop transitions, 0 changer transitions 11/11 dead transitions. [2023-08-26 20:21:03,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 11 transitions, 60 flow [2023-08-26 20:21:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 20:21:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 20:21:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 288 transitions. [2023-08-26 20:21:03,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37894736842105264 [2023-08-26 20:21:03,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 288 transitions. [2023-08-26 20:21:03,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 288 transitions. [2023-08-26 20:21:03,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:21:03,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 288 transitions. [2023-08-26 20:21:03,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 72.0) internal successors, (288), 4 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:03,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:03,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 190.0) internal successors, (950), 5 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 20:21:03,189 INFO L175 Difference]: Start difference. First operand has 23 places, 11 transitions, 40 flow. Second operand 4 states and 288 transitions. [2023-08-26 20:21:03,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 11 transitions, 60 flow [2023-08-26 20:21:03,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 11 transitions, 54 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 20:21:03,189 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-26 20:21:03,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-26 20:21:03,190 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 20:21:03,190 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-26 20:21:03,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 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 20:21:03,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 11 remaining) [2023-08-26 20:21:03,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 20:21:03,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 20:21:03,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2023-08-26 20:21:03,192 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 20:21:03,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 20:21:03,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 11 remaining) [2023-08-26 20:21:03,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 11 remaining) [2023-08-26 20:21:03,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 20:21:03,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 11 remaining) [2023-08-26 20:21:03,193 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 11 remaining) [2023-08-26 20:21:03,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:21:03,193 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-08-26 20:21:03,195 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 20:21:03,195 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 20:21:03,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:21:03 BasicIcfg [2023-08-26 20:21:03,198 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 20:21:03,198 INFO L158 Benchmark]: Toolchain (without parser) took 3701.15ms. Allocated memory was 358.6MB in the beginning and 461.4MB in the end (delta: 102.8MB). Free memory was 334.9MB in the beginning and 316.8MB in the end (delta: 18.2MB). Peak memory consumption was 122.2MB. Max. memory is 16.0GB. [2023-08-26 20:21:03,198 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 358.6MB. Free memory is still 334.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 20:21:03,198 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.25ms. Allocated memory is still 358.6MB. Free memory was 334.4MB in the beginning and 324.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-26 20:21:03,199 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.72ms. Allocated memory is still 358.6MB. Free memory was 324.2MB in the beginning and 322.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:21:03,199 INFO L158 Benchmark]: Boogie Preprocessor took 28.78ms. Allocated memory is still 358.6MB. Free memory was 322.6MB in the beginning and 321.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 20:21:03,199 INFO L158 Benchmark]: RCFGBuilder took 256.67ms. Allocated memory is still 358.6MB. Free memory was 321.0MB in the beginning and 307.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 20:21:03,199 INFO L158 Benchmark]: TraceAbstraction took 3217.51ms. Allocated memory was 358.6MB in the beginning and 461.4MB in the end (delta: 102.8MB). Free memory was 306.9MB in the beginning and 316.8MB in the end (delta: -9.9MB). Peak memory consumption was 95.0MB. Max. memory is 16.0GB. [2023-08-26 20:21:03,200 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 358.6MB. Free memory is still 334.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 163.25ms. Allocated memory is still 358.6MB. Free memory was 334.4MB in the beginning and 324.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.72ms. Allocated memory is still 358.6MB. Free memory was 324.2MB in the beginning and 322.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.78ms. Allocated memory is still 358.6MB. Free memory was 322.6MB in the beginning and 321.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 256.67ms. Allocated memory is still 358.6MB. Free memory was 321.0MB in the beginning and 307.9MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 3217.51ms. Allocated memory was 358.6MB in the beginning and 461.4MB in the end (delta: 102.8MB). Free memory was 306.9MB in the beginning and 316.8MB in the end (delta: -9.9MB). Peak memory consumption was 95.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 92 PlacesBefore, 26 PlacesAfterwards, 87 TransitionsBefore, 19 TransitionsAfterwards, 1036 CoEnabledTransitionPairs, 6 FixpointIterations, 43 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 0 ConcurrentYvCompositions, 2 ChoiceCompositions, 92 TotalNumberOfCompositions, 936 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 936, independent: 936, independent conditional: 0, independent unconditional: 936, 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: 572, independent: 572, independent conditional: 0, independent unconditional: 572, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 936, independent: 364, independent conditional: 0, independent unconditional: 364, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 572, unknown conditional: 0, unknown unconditional: 572] , Statistics on independence cache: Total cache size (in pairs): 15, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, 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 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 21]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 129 locations, 11 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: 3.1s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 63 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 128 IncrementalHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 0 mSDtfsCounter, 128 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=0, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 665 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 9 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 20:21:03,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...