/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/chl-file-item-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:06:07,217 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:06:07,290 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 13:06:07,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:06:07,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:06:07,324 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:06:07,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:06:07,325 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:06:07,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:06:07,329 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:06:07,329 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:06:07,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:06:07,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:06:07,331 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:06:07,331 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:06:07,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:06:07,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:06:07,331 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:06:07,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:06:07,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:06:07,332 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:06:07,333 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:06:07,333 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:06:07,334 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:06:07,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:06:07,334 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:06:07,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:06:07,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:06:07,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:06:07,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:06:07,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:06:07,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:06:07,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:06:07,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:06:07,335 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:06:07,336 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:06:07,650 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:06:07,669 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:06:07,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:06:07,672 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:06:07,672 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:06:07,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-file-item-trans.wvr.c [2023-08-26 13:06:08,837 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:06:09,049 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:06:09,049 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-file-item-trans.wvr.c [2023-08-26 13:06:09,055 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8b23524/ee2e92a726ca46ba9d5c14b8e3d18459/FLAG73c1da907 [2023-08-26 13:06:09,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3d8b23524/ee2e92a726ca46ba9d5c14b8e3d18459 [2023-08-26 13:06:09,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:06:09,067 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:06:09,068 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:06:09,068 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:06:09,070 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:06:09,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec37c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09, skipping insertion in model container [2023-08-26 13:06:09,071 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,087 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:06:09,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:06:09,257 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:06:09,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:06:09,313 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:06:09,314 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09 WrapperNode [2023-08-26 13:06:09,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:06:09,315 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:06:09,315 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:06:09,315 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:06:09,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,341 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,376 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 9, calls inlined = 13, statements flattened = 204 [2023-08-26 13:06:09,377 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:06:09,377 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:06:09,377 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:06:09,377 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:06:09,385 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,399 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,406 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,409 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,411 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:06:09,412 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:06:09,412 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:06:09,412 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:06:09,413 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (1/1) ... [2023-08-26 13:06:09,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:06:09,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:06:09,454 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 13:06:09,479 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 13:06:09,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:06:09,483 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:06:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:06:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:06:09,484 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:06:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:06:09,485 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:06:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:06:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:06:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:06:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:06:09,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:06:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:06:09,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:06:09,487 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 13:06:09,605 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:06:09,607 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:06:09,913 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:06:09,925 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:06:09,925 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 13:06:09,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:06:09 BoogieIcfgContainer [2023-08-26 13:06:09,927 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:06:09,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:06:09,930 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:06:09,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:06:09,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:06:09" (1/3) ... [2023-08-26 13:06:09,933 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f517cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:06:09, skipping insertion in model container [2023-08-26 13:06:09,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:06:09" (2/3) ... [2023-08-26 13:06:09,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f517cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:06:09, skipping insertion in model container [2023-08-26 13:06:09,934 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:06:09" (3/3) ... [2023-08-26 13:06:09,935 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-file-item-trans.wvr.c [2023-08-26 13:06:09,948 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:06:09,949 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:06:09,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:06:10,081 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:06:10,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 247 transitions, 518 flow [2023-08-26 13:06:10,194 INFO L124 PetriNetUnfolderBase]: 19/244 cut-off events. [2023-08-26 13:06:10,194 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:06:10,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 244 events. 19/244 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 568 event pairs, 0 based on Foata normal form. 0/212 useless extension candidates. Maximal degree in co-relation 167. Up to 2 conditions per place. [2023-08-26 13:06:10,207 INFO L82 GeneralOperation]: Start removeDead. Operand has 238 places, 247 transitions, 518 flow [2023-08-26 13:06:10,218 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 233 transitions, 484 flow [2023-08-26 13:06:10,222 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:06:10,235 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 233 transitions, 484 flow [2023-08-26 13:06:10,241 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 233 transitions, 484 flow [2023-08-26 13:06:10,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 233 transitions, 484 flow [2023-08-26 13:06:10,322 INFO L124 PetriNetUnfolderBase]: 19/233 cut-off events. [2023-08-26 13:06:10,322 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:06:10,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 233 events. 19/233 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 569 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 167. Up to 2 conditions per place. [2023-08-26 13:06:10,336 INFO L119 LiptonReduction]: Number of co-enabled transitions 16368 [2023-08-26 13:06:18,334 INFO L134 LiptonReduction]: Checked pairs total: 15953 [2023-08-26 13:06:18,334 INFO L136 LiptonReduction]: Total number of compositions: 295 [2023-08-26 13:06:18,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:06:18,363 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;@3117ca06, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:06:18,363 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:06:18,364 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:06:18,365 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:06:18,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:06:18,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:18,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:06:18,366 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:18,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:18,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1031, now seen corresponding path program 1 times [2023-08-26 13:06:18,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:18,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213429487] [2023-08-26 13:06:18,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:18,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:18,451 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 13:06:18,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:18,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213429487] [2023-08-26 13:06:18,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213429487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:18,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:18,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:06:18,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810320767] [2023-08-26 13:06:18,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:18,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:06:18,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:18,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:06:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:06:18,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 233 out of 542 [2023-08-26 13:06:18,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:18,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:18,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 233 of 542 [2023-08-26 13:06:18,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:18,569 INFO L124 PetriNetUnfolderBase]: 81/164 cut-off events. [2023-08-26 13:06:18,570 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 13:06:18,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 354 conditions, 164 events. 81/164 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 464 event pairs, 81 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 244. Up to 165 conditions per place. [2023-08-26 13:06:18,572 INFO L140 encePairwiseOnDemand]: 540/542 looper letters, 26 selfloop transitions, 0 changer transitions 0/26 dead transitions. [2023-08-26 13:06:18,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 26 transitions, 122 flow [2023-08-26 13:06:18,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:06:18,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:06:18,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 494 transitions. [2023-08-26 13:06:18,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45571955719557194 [2023-08-26 13:06:18,591 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 494 transitions. [2023-08-26 13:06:18,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 494 transitions. [2023-08-26 13:06:18,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:18,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 494 transitions. [2023-08-26 13:06:18,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 247.0) internal successors, (494), 2 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:18,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 542.0) internal successors, (1626), 3 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:18,609 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 542.0) internal successors, (1626), 3 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:18,610 INFO L175 Difference]: Start difference. First operand has 38 places, 28 transitions, 74 flow. Second operand 2 states and 494 transitions. [2023-08-26 13:06:18,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 26 transitions, 122 flow [2023-08-26 13:06:18,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 110 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:06:18,615 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 58 flow [2023-08-26 13:06:18,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=58, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-26 13:06:18,620 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 13:06:18,620 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 58 flow [2023-08-26 13:06:18,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 233.5) internal successors, (467), 2 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:18,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:18,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:06:18,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:06:18,622 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:18,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:18,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1015475, now seen corresponding path program 1 times [2023-08-26 13:06:18,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:18,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044175632] [2023-08-26 13:06:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:18,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:18,943 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 13:06:18,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:18,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044175632] [2023-08-26 13:06:18,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044175632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:18,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:18,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:06:18,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420973431] [2023-08-26 13:06:18,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:18,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:06:18,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:18,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:06:18,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:06:18,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 542 [2023-08-26 13:06:18,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:18,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:18,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 542 [2023-08-26 13:06:18,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:19,024 INFO L124 PetriNetUnfolderBase]: 76/153 cut-off events. [2023-08-26 13:06:19,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:06:19,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 153 events. 76/153 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 423 event pairs, 76 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2023-08-26 13:06:19,025 INFO L140 encePairwiseOnDemand]: 539/542 looper letters, 23 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 13:06:19,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 102 flow [2023-08-26 13:06:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:06:19,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:06:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 659 transitions. [2023-08-26 13:06:19,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052890528905289 [2023-08-26 13:06:19,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 659 transitions. [2023-08-26 13:06:19,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 659 transitions. [2023-08-26 13:06:19,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:19,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 659 transitions. [2023-08-26 13:06:19,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 219.66666666666666) internal successors, (659), 3 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,034 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 58 flow. Second operand 3 states and 659 transitions. [2023-08-26 13:06:19,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 102 flow [2023-08-26 13:06:19,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:06:19,035 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 56 flow [2023-08-26 13:06:19,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-08-26 13:06:19,036 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -7 predicate places. [2023-08-26 13:06:19,036 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 56 flow [2023-08-26 13:06:19,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.0) internal successors, (636), 3 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:19,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:06:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:06:19,037 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:19,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1015476, now seen corresponding path program 1 times [2023-08-26 13:06:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:19,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272221099] [2023-08-26 13:06:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:19,090 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 13:06:19,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:19,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272221099] [2023-08-26 13:06:19,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272221099] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:19,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:19,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:06:19,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920121778] [2023-08-26 13:06:19,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:19,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:06:19,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:06:19,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:06:19,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 542 [2023-08-26 13:06:19,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:19,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 542 [2023-08-26 13:06:19,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:19,148 INFO L124 PetriNetUnfolderBase]: 71/142 cut-off events. [2023-08-26 13:06:19,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:06:19,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 142 events. 71/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 384 event pairs, 71 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 292. Up to 142 conditions per place. [2023-08-26 13:06:19,149 INFO L140 encePairwiseOnDemand]: 539/542 looper letters, 21 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 13:06:19,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 22 transitions, 96 flow [2023-08-26 13:06:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:06:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:06:19,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 648 transitions. [2023-08-26 13:06:19,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985239852398524 [2023-08-26 13:06:19,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 648 transitions. [2023-08-26 13:06:19,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 648 transitions. [2023-08-26 13:06:19,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:19,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 648 transitions. [2023-08-26 13:06:19,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,157 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 56 flow. Second operand 3 states and 648 transitions. [2023-08-26 13:06:19,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 22 transitions, 96 flow [2023-08-26 13:06:19,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 22 transitions, 95 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:06:19,158 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 53 flow [2023-08-26 13:06:19,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-08-26 13:06:19,159 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -8 predicate places. [2023-08-26 13:06:19,159 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 53 flow [2023-08-26 13:06:19,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.0) internal successors, (627), 3 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:19,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:06:19,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:06:19,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:19,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash 975896105, now seen corresponding path program 1 times [2023-08-26 13:06:19,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:19,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196232551] [2023-08-26 13:06:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:19,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:19,197 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 13:06:19,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:19,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196232551] [2023-08-26 13:06:19,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196232551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:19,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:19,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:06:19,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750891920] [2023-08-26 13:06:19,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:19,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:06:19,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:19,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:06:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:06:19,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 208 out of 542 [2023-08-26 13:06:19,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:19,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 208 of 542 [2023-08-26 13:06:19,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:19,280 INFO L124 PetriNetUnfolderBase]: 66/131 cut-off events. [2023-08-26 13:06:19,280 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:06:19,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 131 events. 66/131 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 341 event pairs, 66 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 271. Up to 131 conditions per place. [2023-08-26 13:06:19,281 INFO L140 encePairwiseOnDemand]: 539/542 looper letters, 19 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2023-08-26 13:06:19,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 20 transitions, 89 flow [2023-08-26 13:06:19,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:06:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:06:19,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-26 13:06:19,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972939729397294 [2023-08-26 13:06:19,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-26 13:06:19,284 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-26 13:06:19,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:19,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-26 13:06:19,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,291 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,291 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 53 flow. Second operand 3 states and 646 transitions. [2023-08-26 13:06:19,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 20 transitions, 89 flow [2023-08-26 13:06:19,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 20 transitions, 88 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:06:19,292 INFO L231 Difference]: Finished difference. Result has 29 places, 20 transitions, 50 flow [2023-08-26 13:06:19,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=29, PETRI_TRANSITIONS=20} [2023-08-26 13:06:19,292 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -9 predicate places. [2023-08-26 13:06:19,293 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 20 transitions, 50 flow [2023-08-26 13:06:19,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:19,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:06:19,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:06:19,294 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:19,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash 975896107, now seen corresponding path program 1 times [2023-08-26 13:06:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:19,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549367998] [2023-08-26 13:06:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:19,363 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 13:06:19,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:19,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549367998] [2023-08-26 13:06:19,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549367998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:19,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:19,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:06:19,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014334762] [2023-08-26 13:06:19,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:19,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:06:19,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:19,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:06:19,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:06:19,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 542 [2023-08-26 13:06:19,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 20 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:19,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 542 [2023-08-26 13:06:19,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:19,428 INFO L124 PetriNetUnfolderBase]: 61/120 cut-off events. [2023-08-26 13:06:19,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:06:19,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 120 events. 61/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 298 event pairs, 61 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 250. Up to 120 conditions per place. [2023-08-26 13:06:19,429 INFO L140 encePairwiseOnDemand]: 539/542 looper letters, 17 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-08-26 13:06:19,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 18 transitions, 82 flow [2023-08-26 13:06:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:06:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:06:19,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2023-08-26 13:06:19,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015990159901599 [2023-08-26 13:06:19,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2023-08-26 13:06:19,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2023-08-26 13:06:19,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:19,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2023-08-26 13:06:19,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,438 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,439 INFO L175 Difference]: Start difference. First operand has 29 places, 20 transitions, 50 flow. Second operand 3 states and 653 transitions. [2023-08-26 13:06:19,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 18 transitions, 82 flow [2023-08-26 13:06:19,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 18 transitions, 81 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:06:19,440 INFO L231 Difference]: Finished difference. Result has 28 places, 18 transitions, 47 flow [2023-08-26 13:06:19,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=28, PETRI_TRANSITIONS=18} [2023-08-26 13:06:19,440 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:06:19,441 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 18 transitions, 47 flow [2023-08-26 13:06:19,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 212.66666666666666) internal successors, (638), 3 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:19,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:19,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:06:19,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:19,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1533310129, now seen corresponding path program 1 times [2023-08-26 13:06:19,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826391463] [2023-08-26 13:06:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:19,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:19,542 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 13:06:19,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826391463] [2023-08-26 13:06:19,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826391463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:19,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:19,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:06:19,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962999123] [2023-08-26 13:06:19,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:19,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:06:19,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:19,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:06:19,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:06:19,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 542 [2023-08-26 13:06:19,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 18 transitions, 47 flow. Second operand has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:19,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 542 [2023-08-26 13:06:19,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:19,589 INFO L124 PetriNetUnfolderBase]: 49/100 cut-off events. [2023-08-26 13:06:19,589 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:06:19,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 100 events. 49/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 222 event pairs, 49 based on Foata normal form. 0/92 useless extension candidates. Maximal degree in co-relation 211. Up to 100 conditions per place. [2023-08-26 13:06:19,590 INFO L140 encePairwiseOnDemand]: 540/542 looper letters, 16 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2023-08-26 13:06:19,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 17 transitions, 79 flow [2023-08-26 13:06:19,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:06:19,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:06:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2023-08-26 13:06:19,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003690036900369 [2023-08-26 13:06:19,592 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2023-08-26 13:06:19,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2023-08-26 13:06:19,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:19,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2023-08-26 13:06:19,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,598 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,598 INFO L175 Difference]: Start difference. First operand has 28 places, 18 transitions, 47 flow. Second operand 3 states and 651 transitions. [2023-08-26 13:06:19,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 17 transitions, 79 flow [2023-08-26 13:06:19,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 17 transitions, 78 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:06:19,599 INFO L231 Difference]: Finished difference. Result has 28 places, 17 transitions, 46 flow [2023-08-26 13:06:19,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=28, PETRI_TRANSITIONS=17} [2023-08-26 13:06:19,599 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:06:19,599 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 17 transitions, 46 flow [2023-08-26 13:06:19,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 213.33333333333334) internal successors, (640), 3 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:19,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:19,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:06:19,600 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:19,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:19,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1533310128, now seen corresponding path program 1 times [2023-08-26 13:06:19,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:19,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859248214] [2023-08-26 13:06:19,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:19,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:19,679 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 13:06:19,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:19,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859248214] [2023-08-26 13:06:19,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859248214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:19,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:19,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:06:19,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659958856] [2023-08-26 13:06:19,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:19,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:06:19,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:19,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:06:19,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:06:19,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 542 [2023-08-26 13:06:19,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 17 transitions, 46 flow. Second operand has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:19,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 542 [2023-08-26 13:06:19,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:19,726 INFO L124 PetriNetUnfolderBase]: 37/80 cut-off events. [2023-08-26 13:06:19,726 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:06:19,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 80 events. 37/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 149 event pairs, 37 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 172. Up to 80 conditions per place. [2023-08-26 13:06:19,727 INFO L140 encePairwiseOnDemand]: 540/542 looper letters, 15 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2023-08-26 13:06:19,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 16 transitions, 76 flow [2023-08-26 13:06:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:06:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:06:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 623 transitions. [2023-08-26 13:06:19,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38314883148831486 [2023-08-26 13:06:19,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 623 transitions. [2023-08-26 13:06:19,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 623 transitions. [2023-08-26 13:06:19,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:19,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 623 transitions. [2023-08-26 13:06:19,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,734 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 542.0) internal successors, (2168), 4 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,734 INFO L175 Difference]: Start difference. First operand has 28 places, 17 transitions, 46 flow. Second operand 3 states and 623 transitions. [2023-08-26 13:06:19,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 16 transitions, 76 flow [2023-08-26 13:06:19,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 16 transitions, 75 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:06:19,735 INFO L231 Difference]: Finished difference. Result has 28 places, 16 transitions, 45 flow [2023-08-26 13:06:19,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=45, PETRI_PLACES=28, PETRI_TRANSITIONS=16} [2023-08-26 13:06:19,735 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -10 predicate places. [2023-08-26 13:06:19,735 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 16 transitions, 45 flow [2023-08-26 13:06:19,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 203.4) internal successors, (1017), 5 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:19,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:19,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:19,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:06:19,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:19,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:19,737 INFO L85 PathProgramCache]: Analyzing trace with hash 887820056, now seen corresponding path program 1 times [2023-08-26 13:06:19,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:19,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367712990] [2023-08-26 13:06:19,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:19,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:21,085 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 13:06:21,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367712990] [2023-08-26 13:06:21,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367712990] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:21,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:21,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:06:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627403709] [2023-08-26 13:06:21,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:21,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:06:21,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:06:21,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:06:21,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 542 [2023-08-26 13:06:21,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 16 transitions, 45 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:21,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:21,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 542 [2023-08-26 13:06:21,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:21,347 INFO L124 PetriNetUnfolderBase]: 41/109 cut-off events. [2023-08-26 13:06:21,347 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:06:21,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 109 events. 41/109 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 364 event pairs, 3 based on Foata normal form. 1/110 useless extension candidates. Maximal degree in co-relation 232. Up to 50 conditions per place. [2023-08-26 13:06:21,348 INFO L140 encePairwiseOnDemand]: 537/542 looper letters, 28 selfloop transitions, 6 changer transitions 5/39 dead transitions. [2023-08-26 13:06:21,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 39 transitions, 178 flow [2023-08-26 13:06:21,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:06:21,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:06:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 915 transitions. [2023-08-26 13:06:21,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3376383763837638 [2023-08-26 13:06:21,353 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 915 transitions. [2023-08-26 13:06:21,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 915 transitions. [2023-08-26 13:06:21,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:21,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 915 transitions. [2023-08-26 13:06:21,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:21,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 542.0) internal successors, (3252), 6 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:21,360 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 542.0) internal successors, (3252), 6 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:21,361 INFO L175 Difference]: Start difference. First operand has 28 places, 16 transitions, 45 flow. Second operand 5 states and 915 transitions. [2023-08-26 13:06:21,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 39 transitions, 178 flow [2023-08-26 13:06:21,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 39 transitions, 177 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:06:21,362 INFO L231 Difference]: Finished difference. Result has 33 places, 19 transitions, 74 flow [2023-08-26 13:06:21,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=33, PETRI_TRANSITIONS=19} [2023-08-26 13:06:21,364 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-26 13:06:21,364 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 19 transitions, 74 flow [2023-08-26 13:06:21,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:21,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:21,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:21,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:06:21,365 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:21,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:21,366 INFO L85 PathProgramCache]: Analyzing trace with hash -549152384, now seen corresponding path program 2 times [2023-08-26 13:06:21,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:21,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067385861] [2023-08-26 13:06:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:21,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:22,276 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 13:06:22,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:22,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067385861] [2023-08-26 13:06:22,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067385861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:22,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:22,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:06:22,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6764459] [2023-08-26 13:06:22,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:22,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:06:22,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:22,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:06:22,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:06:22,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 542 [2023-08-26 13:06:22,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 19 transitions, 74 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:22,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:22,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 542 [2023-08-26 13:06:22,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:22,551 INFO L124 PetriNetUnfolderBase]: 39/122 cut-off events. [2023-08-26 13:06:22,551 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-26 13:06:22,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 122 events. 39/122 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 453 event pairs, 2 based on Foata normal form. 1/123 useless extension candidates. Maximal degree in co-relation 344. Up to 54 conditions per place. [2023-08-26 13:06:22,552 INFO L140 encePairwiseOnDemand]: 537/542 looper letters, 32 selfloop transitions, 7 changer transitions 8/47 dead transitions. [2023-08-26 13:06:22,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 250 flow [2023-08-26 13:06:22,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:06:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:06:22,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1096 transitions. [2023-08-26 13:06:22,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3370233702337023 [2023-08-26 13:06:22,555 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1096 transitions. [2023-08-26 13:06:22,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1096 transitions. [2023-08-26 13:06:22,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:22,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1096 transitions. [2023-08-26 13:06:22,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.66666666666666) internal successors, (1096), 6 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:22,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:22,563 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:22,563 INFO L175 Difference]: Start difference. First operand has 33 places, 19 transitions, 74 flow. Second operand 6 states and 1096 transitions. [2023-08-26 13:06:22,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 250 flow [2023-08-26 13:06:22,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:06:22,565 INFO L231 Difference]: Finished difference. Result has 40 places, 22 transitions, 113 flow [2023-08-26 13:06:22,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=113, PETRI_PLACES=40, PETRI_TRANSITIONS=22} [2023-08-26 13:06:22,565 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-26 13:06:22,565 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 22 transitions, 113 flow [2023-08-26 13:06:22,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:22,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:22,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:22,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:06:22,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:22,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:22,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1738759144, now seen corresponding path program 3 times [2023-08-26 13:06:22,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:22,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707046227] [2023-08-26 13:06:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:22,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:22,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:23,489 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 13:06:23,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:23,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707046227] [2023-08-26 13:06:23,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707046227] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:23,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:23,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:06:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269712259] [2023-08-26 13:06:23,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:23,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:06:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:06:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:06:23,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 542 [2023-08-26 13:06:23,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 22 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:23,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:23,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 542 [2023-08-26 13:06:23,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:23,763 INFO L124 PetriNetUnfolderBase]: 34/112 cut-off events. [2023-08-26 13:06:23,763 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2023-08-26 13:06:23,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 112 events. 34/112 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 394 event pairs, 9 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 366. Up to 62 conditions per place. [2023-08-26 13:06:23,764 INFO L140 encePairwiseOnDemand]: 537/542 looper letters, 24 selfloop transitions, 6 changer transitions 10/40 dead transitions. [2023-08-26 13:06:23,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 246 flow [2023-08-26 13:06:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:06:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:06:23,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 913 transitions. [2023-08-26 13:06:23,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33690036900369 [2023-08-26 13:06:23,768 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 913 transitions. [2023-08-26 13:06:23,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 913 transitions. [2023-08-26 13:06:23,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:23,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 913 transitions. [2023-08-26 13:06:23,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:23,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 542.0) internal successors, (3252), 6 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:23,775 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 542.0) internal successors, (3252), 6 states have internal predecessors, (3252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:23,775 INFO L175 Difference]: Start difference. First operand has 40 places, 22 transitions, 113 flow. Second operand 5 states and 913 transitions. [2023-08-26 13:06:23,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 246 flow [2023-08-26 13:06:23,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 226 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-08-26 13:06:23,777 INFO L231 Difference]: Finished difference. Result has 42 places, 20 transitions, 110 flow [2023-08-26 13:06:23,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=42, PETRI_TRANSITIONS=20} [2023-08-26 13:06:23,778 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 4 predicate places. [2023-08-26 13:06:23,778 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 20 transitions, 110 flow [2023-08-26 13:06:23,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:23,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:23,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:23,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:06:23,779 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:23,779 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:23,779 INFO L85 PathProgramCache]: Analyzing trace with hash 540355844, now seen corresponding path program 4 times [2023-08-26 13:06:23,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:23,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531142654] [2023-08-26 13:06:23,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:23,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:24,648 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 13:06:24,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:24,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531142654] [2023-08-26 13:06:24,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531142654] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:24,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:24,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:06:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744557828] [2023-08-26 13:06:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 13:06:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 13:06:24,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 13:06:24,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 542 [2023-08-26 13:06:24,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 20 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 170.28571428571428) internal successors, (1192), 7 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:24,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:24,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 542 [2023-08-26 13:06:24,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:24,928 INFO L124 PetriNetUnfolderBase]: 18/68 cut-off events. [2023-08-26 13:06:24,929 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2023-08-26 13:06:24,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 68 events. 18/68 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 179 event pairs, 1 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 242. Up to 21 conditions per place. [2023-08-26 13:06:24,929 INFO L140 encePairwiseOnDemand]: 537/542 looper letters, 24 selfloop transitions, 5 changer transitions 12/41 dead transitions. [2023-08-26 13:06:24,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 245 flow [2023-08-26 13:06:24,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:06:24,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:06:24,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1217 transitions. [2023-08-26 13:06:24,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32076963626779126 [2023-08-26 13:06:24,935 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1217 transitions. [2023-08-26 13:06:24,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1217 transitions. [2023-08-26 13:06:24,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:24,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1217 transitions. [2023-08-26 13:06:24,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 173.85714285714286) internal successors, (1217), 7 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:24,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 542.0) internal successors, (4336), 8 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:24,945 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 542.0) internal successors, (4336), 8 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:24,945 INFO L175 Difference]: Start difference. First operand has 42 places, 20 transitions, 110 flow. Second operand 7 states and 1217 transitions. [2023-08-26 13:06:24,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 245 flow [2023-08-26 13:06:24,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 41 transitions, 231 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 13:06:24,948 INFO L231 Difference]: Finished difference. Result has 46 places, 18 transitions, 94 flow [2023-08-26 13:06:24,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=94, PETRI_PLACES=46, PETRI_TRANSITIONS=18} [2023-08-26 13:06:24,949 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 8 predicate places. [2023-08-26 13:06:24,949 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 18 transitions, 94 flow [2023-08-26 13:06:24,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 170.28571428571428) internal successors, (1192), 7 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:24,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:24,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:24,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:06:24,950 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:24,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:24,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1873689528, now seen corresponding path program 5 times [2023-08-26 13:06:24,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:24,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620688761] [2023-08-26 13:06:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:24,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:25,674 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 13:06:25,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:25,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620688761] [2023-08-26 13:06:25,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620688761] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:25,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:25,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:06:25,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997009449] [2023-08-26 13:06:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:25,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:06:25,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:25,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:06:25,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:06:25,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 542 [2023-08-26 13:06:25,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 18 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:25,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:25,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 542 [2023-08-26 13:06:25,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:25,908 INFO L124 PetriNetUnfolderBase]: 7/37 cut-off events. [2023-08-26 13:06:25,908 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-26 13:06:25,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 37 events. 7/37 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 1/38 useless extension candidates. Maximal degree in co-relation 134. Up to 14 conditions per place. [2023-08-26 13:06:25,909 INFO L140 encePairwiseOnDemand]: 537/542 looper letters, 17 selfloop transitions, 3 changer transitions 8/28 dead transitions. [2023-08-26 13:06:25,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 28 transitions, 174 flow [2023-08-26 13:06:25,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:06:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:06:25,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1078 transitions. [2023-08-26 13:06:25,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33148831488314884 [2023-08-26 13:06:25,913 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1078 transitions. [2023-08-26 13:06:25,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1078 transitions. [2023-08-26 13:06:25,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:25,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1078 transitions. [2023-08-26 13:06:25,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 179.66666666666666) internal successors, (1078), 6 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:25,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:25,920 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:25,920 INFO L175 Difference]: Start difference. First operand has 46 places, 18 transitions, 94 flow. Second operand 6 states and 1078 transitions. [2023-08-26 13:06:25,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 28 transitions, 174 flow [2023-08-26 13:06:25,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 28 transitions, 139 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-26 13:06:25,922 INFO L231 Difference]: Finished difference. Result has 38 places, 16 transitions, 57 flow [2023-08-26 13:06:25,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=57, PETRI_PLACES=38, PETRI_TRANSITIONS=16} [2023-08-26 13:06:25,922 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 0 predicate places. [2023-08-26 13:06:25,922 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 16 transitions, 57 flow [2023-08-26 13:06:25,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:25,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:06:25,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:25,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:06:25,923 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:06:25,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:06:25,924 INFO L85 PathProgramCache]: Analyzing trace with hash -994056646, now seen corresponding path program 6 times [2023-08-26 13:06:25,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:06:25,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824966209] [2023-08-26 13:06:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:06:25,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:06:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:06:26,570 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 13:06:26,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:06:26,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824966209] [2023-08-26 13:06:26,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824966209] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:06:26,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:06:26,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:06:26,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936794287] [2023-08-26 13:06:26,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:06:26,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:06:26,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:06:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:06:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:06:26,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 542 [2023-08-26 13:06:26,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 16 transitions, 57 flow. Second operand has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:26,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:06:26,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 542 [2023-08-26 13:06:26,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:06:26,764 INFO L124 PetriNetUnfolderBase]: 5/25 cut-off events. [2023-08-26 13:06:26,764 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 13:06:26,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 25 events. 5/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 1/26 useless extension candidates. Maximal degree in co-relation 78. Up to 10 conditions per place. [2023-08-26 13:06:26,764 INFO L140 encePairwiseOnDemand]: 537/542 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 13:06:26,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 20 transitions, 104 flow [2023-08-26 13:06:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 13:06:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 13:06:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1071 transitions. [2023-08-26 13:06:26,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32933579335793356 [2023-08-26 13:06:26,768 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1071 transitions. [2023-08-26 13:06:26,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1071 transitions. [2023-08-26 13:06:26,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:06:26,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1071 transitions. [2023-08-26 13:06:26,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 178.5) internal successors, (1071), 6 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:26,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:26,775 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 542.0) internal successors, (3794), 7 states have internal predecessors, (3794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:26,776 INFO L175 Difference]: Start difference. First operand has 38 places, 16 transitions, 57 flow. Second operand 6 states and 1071 transitions. [2023-08-26 13:06:26,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 20 transitions, 104 flow [2023-08-26 13:06:26,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 20 transitions, 95 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-26 13:06:26,776 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-26 13:06:26,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=542, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-26 13:06:26,777 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-26 13:06:26,777 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-26 13:06:26,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 178.2) internal successors, (891), 5 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 16 remaining) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 16 remaining) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 16 remaining) [2023-08-26 13:06:26,780 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (3 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 16 remaining) [2023-08-26 13:06:26,781 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 16 remaining) [2023-08-26 13:06:26,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:06:26,782 INFO L445 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:06:26,784 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 13:06:26,784 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 13:06:26,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 01:06:26 BasicIcfg [2023-08-26 13:06:26,786 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 13:06:26,787 INFO L158 Benchmark]: Toolchain (without parser) took 17719.41ms. Allocated memory was 348.1MB in the beginning and 604.0MB in the end (delta: 255.9MB). Free memory was 324.2MB in the beginning and 289.7MB in the end (delta: 34.5MB). Peak memory consumption was 293.0MB. Max. memory is 16.0GB. [2023-08-26 13:06:26,787 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 325.3MB in the beginning and 325.2MB in the end (delta: 89.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:06:26,787 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.26ms. Allocated memory is still 348.1MB. Free memory was 323.7MB in the beginning and 312.7MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 13:06:26,787 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.64ms. Allocated memory is still 348.1MB. Free memory was 312.7MB in the beginning and 310.0MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:06:26,787 INFO L158 Benchmark]: Boogie Preprocessor took 34.38ms. Allocated memory is still 348.1MB. Free memory was 310.0MB in the beginning and 308.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 13:06:26,788 INFO L158 Benchmark]: RCFGBuilder took 515.33ms. Allocated memory is still 348.1MB. Free memory was 308.5MB in the beginning and 287.0MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 13:06:26,788 INFO L158 Benchmark]: TraceAbstraction took 16856.76ms. Allocated memory was 348.1MB in the beginning and 604.0MB in the end (delta: 255.9MB). Free memory was 286.4MB in the beginning and 289.7MB in the end (delta: -3.3MB). Peak memory consumption was 255.3MB. Max. memory is 16.0GB. [2023-08-26 13:06:26,789 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 325.3MB in the beginning and 325.2MB in the end (delta: 89.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 246.26ms. Allocated memory is still 348.1MB. Free memory was 323.7MB in the beginning and 312.7MB in the end (delta: 11.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.64ms. Allocated memory is still 348.1MB. Free memory was 312.7MB in the beginning and 310.0MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 34.38ms. Allocated memory is still 348.1MB. Free memory was 310.0MB in the beginning and 308.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 515.33ms. Allocated memory is still 348.1MB. Free memory was 308.5MB in the beginning and 287.0MB in the end (delta: 21.5MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 16856.76ms. Allocated memory was 348.1MB in the beginning and 604.0MB in the end (delta: 255.9MB). Free memory was 286.4MB in the beginning and 289.7MB in the end (delta: -3.3MB). Peak memory consumption was 255.3MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 8.1s, 224 PlacesBefore, 38 PlacesAfterwards, 233 TransitionsBefore, 28 TransitionsAfterwards, 16368 CoEnabledTransitionPairs, 7 FixpointIterations, 71 TrivialSequentialCompositions, 139 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 63 ConcurrentYvCompositions, 19 ChoiceCompositions, 295 TotalNumberOfCompositions, 15953 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 15953, independent: 15953, independent conditional: 0, independent unconditional: 15953, 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: 10123, independent: 10123, independent conditional: 0, independent unconditional: 10123, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 15953, independent: 5830, independent conditional: 0, independent unconditional: 5830, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 10123, unknown conditional: 0, unknown unconditional: 10123] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 36, Positive conditional cache size: 0, Positive unconditional cache size: 36, 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: -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 7 procedures, 349 locations, 16 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.7s, OverallIterations: 13, TraceHistogramMax: 1, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 334 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 334 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 518 IncrementalHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 0 mSDtfsCounter, 518 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=9, InterpolantAutomatonStates: 55, 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, 0.3s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 127 NumberOfCodeBlocks, 127 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 114 ConstructedInterpolants, 0 QuantifiedInterpolants, 2516 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 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 13 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 13:06:26,808 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...