./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c4f91361 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-c4f9136-m [2023-11-23 15:38:54,178 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 15:38:54,248 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 15:38:54,252 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 15:38:54,253 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 15:38:54,268 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 15:38:54,269 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 15:38:54,270 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 15:38:54,270 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 15:38:54,273 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 15:38:54,274 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 15:38:54,274 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 15:38:54,274 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 15:38:54,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 15:38:54,275 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 15:38:54,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 15:38:54,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 15:38:54,276 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 15:38:54,276 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 15:38:54,276 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 15:38:54,277 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 15:38:54,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 15:38:54,277 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 15:38:54,277 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 15:38:54,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 15:38:54,278 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 15:38:54,278 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 15:38:54,278 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 15:38:54,279 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 15:38:54,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 15:38:54,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:38:54,280 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 15:38:54,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 15:38:54,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 15:38:54,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 15:38:54,280 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 15:38:54,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 15:38:54,281 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 15:38:54,281 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 15:38:54,281 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d61eb304445c3cb39dfadfa4748d680ea5f0f4958f8bc176e8bc3c77c47e674 [2023-11-23 15:38:54,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 15:38:54,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 15:38:54,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 15:38:54,498 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 15:38:54,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 15:38:54,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-11-23 15:38:55,455 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 15:38:55,719 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 15:38:55,719 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/safestack_relacy.i [2023-11-23 15:38:55,738 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08226d807/e5c6991068ad48fe9d4e20c39695fc61/FLAG2f2e930b0 [2023-11-23 15:38:55,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08226d807/e5c6991068ad48fe9d4e20c39695fc61 [2023-11-23 15:38:55,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 15:38:55,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 15:38:55,757 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 15:38:55,757 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 15:38:55,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 15:38:55,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:38:55" (1/1) ... [2023-11-23 15:38:55,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b1446d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:55, skipping insertion in model container [2023-11-23 15:38:55,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:38:55" (1/1) ... [2023-11-23 15:38:55,806 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 15:38:56,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:38:56,288 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 15:38:56,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 15:38:56,418 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 15:38:56,418 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 15:38:56,424 INFO L206 MainTranslator]: Completed translation [2023-11-23 15:38:56,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56 WrapperNode [2023-11-23 15:38:56,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 15:38:56,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 15:38:56,425 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 15:38:56,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 15:38:56,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,458 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,499 INFO L138 Inliner]: procedures = 481, calls = 75, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 288 [2023-11-23 15:38:56,500 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 15:38:56,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 15:38:56,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 15:38:56,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 15:38:56,507 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,507 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,518 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,519 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,528 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,535 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,537 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,541 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 15:38:56,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 15:38:56,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 15:38:56,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 15:38:56,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (1/1) ... [2023-11-23 15:38:56,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 15:38:56,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:38:56,598 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) [2023-11-23 15:38:56,629 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 [2023-11-23 15:38:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 15:38:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 15:38:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 15:38:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 15:38:56,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 15:38:56,651 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-11-23 15:38:56,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-11-23 15:38:56,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 15:38:56,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 15:38:56,651 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 15:38:56,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 15:38:56,651 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 15:38:56,652 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 15:38:56,897 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 15:38:56,900 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 15:38:57,285 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 15:38:57,477 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 15:38:57,477 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-11-23 15:38:57,477 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:38:57 BoogieIcfgContainer [2023-11-23 15:38:57,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 15:38:57,479 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 15:38:57,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 15:38:57,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 15:38:57,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:38:55" (1/3) ... [2023-11-23 15:38:57,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5736bc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:38:57, skipping insertion in model container [2023-11-23 15:38:57,484 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:56" (2/3) ... [2023-11-23 15:38:57,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5736bc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:38:57, skipping insertion in model container [2023-11-23 15:38:57,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:38:57" (3/3) ... [2023-11-23 15:38:57,486 INFO L112 eAbstractionObserver]: Analyzing ICFG safestack_relacy.i [2023-11-23 15:38:57,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 15:38:57,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2023-11-23 15:38:57,500 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 15:38:57,610 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-23 15:38:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 141 transitions, 289 flow [2023-11-23 15:38:57,669 INFO L124 PetriNetUnfolderBase]: 14/153 cut-off events. [2023-11-23 15:38:57,669 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-23 15:38:57,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 153 events. 14/153 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 637 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 118. Up to 3 conditions per place. [2023-11-23 15:38:57,673 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 141 transitions, 289 flow [2023-11-23 15:38:57,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 141 transitions, 289 flow [2023-11-23 15:38:57,692 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 15:38:57,697 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=All, 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;@41a9ea95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 15:38:57,698 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2023-11-23 15:38:57,700 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 15:38:57,700 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-23 15:38:57,701 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 15:38:57,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:38:57,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 15:38:57,701 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:38:57,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:38:57,707 INFO L85 PathProgramCache]: Analyzing trace with hash 30035, now seen corresponding path program 1 times [2023-11-23 15:38:57,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:38:57,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054597553] [2023-11-23 15:38:57,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:38:57,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:38:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:38:58,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:38:58,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:38:58,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054597553] [2023-11-23 15:38:58,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054597553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:38:58,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:38:58,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 15:38:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513020177] [2023-11-23 15:38:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:38:58,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:38:58,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:38:58,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:38:58,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:38:58,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:38:58,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 141 transitions, 289 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:38:58,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:38:58,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:38:58,404 INFO L124 PetriNetUnfolderBase]: 289/751 cut-off events. [2023-11-23 15:38:58,405 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-11-23 15:38:58,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1356 conditions, 751 events. 289/751 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3641 event pairs, 245 based on Foata normal form. 12/494 useless extension candidates. Maximal degree in co-relation 1290. Up to 597 conditions per place. [2023-11-23 15:38:58,410 INFO L140 encePairwiseOnDemand]: 109/141 looper letters, 78 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-11-23 15:38:58,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 387 flow [2023-11-23 15:38:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:38:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:38:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2023-11-23 15:38:58,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4728132387706856 [2023-11-23 15:38:58,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2023-11-23 15:38:58,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2023-11-23 15:38:58,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:38:58,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2023-11-23 15:38:58,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,444 INFO L175 Difference]: Start difference. First operand has 130 places, 141 transitions, 289 flow. Second operand 3 states and 200 transitions. [2023-11-23 15:38:58,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 387 flow [2023-11-23 15:38:58,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 110 transitions, 387 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 15:38:58,449 INFO L231 Difference]: Finished difference. Result has 106 places, 110 transitions, 231 flow [2023-11-23 15:38:58,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=231, PETRI_PLACES=106, PETRI_TRANSITIONS=110} [2023-11-23 15:38:58,453 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -24 predicate places. [2023-11-23 15:38:58,453 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 110 transitions, 231 flow [2023-11-23 15:38:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:38:58,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 15:38:58,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 15:38:58,454 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:38:58,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:38:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash 30036, now seen corresponding path program 1 times [2023-11-23 15:38:58,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:38:58,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542104289] [2023-11-23 15:38:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:38:58,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:38:58,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:38:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:38:58,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:38:58,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542104289] [2023-11-23 15:38:58,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542104289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:38:58,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:38:58,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 15:38:58,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374166289] [2023-11-23 15:38:58,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:38:58,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:38:58,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:38:58,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:38:58,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:38:58,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:38:58,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 110 transitions, 231 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:38:58,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:38:58,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:38:58,794 INFO L124 PetriNetUnfolderBase]: 289/750 cut-off events. [2023-11-23 15:38:58,794 INFO L125 PetriNetUnfolderBase]: For 4/6 co-relation queries the response was YES. [2023-11-23 15:38:58,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1357 conditions, 750 events. 289/750 cut-off events. For 4/6 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3645 event pairs, 245 based on Foata normal form. 0/482 useless extension candidates. Maximal degree in co-relation 1345. Up to 597 conditions per place. [2023-11-23 15:38:58,800 INFO L140 encePairwiseOnDemand]: 138/141 looper letters, 77 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2023-11-23 15:38:58,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 109 transitions, 387 flow [2023-11-23 15:38:58,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:38:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:38:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 170 transitions. [2023-11-23 15:38:58,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40189125295508277 [2023-11-23 15:38:58,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 170 transitions. [2023-11-23 15:38:58,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 170 transitions. [2023-11-23 15:38:58,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:38:58,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 170 transitions. [2023-11-23 15:38:58,806 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,808 INFO L175 Difference]: Start difference. First operand has 106 places, 110 transitions, 231 flow. Second operand 3 states and 170 transitions. [2023-11-23 15:38:58,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 109 transitions, 387 flow [2023-11-23 15:38:58,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 109 transitions, 383 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:38:58,812 INFO L231 Difference]: Finished difference. Result has 105 places, 109 transitions, 229 flow [2023-11-23 15:38:58,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=229, PETRI_PLACES=105, PETRI_TRANSITIONS=109} [2023-11-23 15:38:58,813 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -25 predicate places. [2023-11-23 15:38:58,813 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 109 transitions, 229 flow [2023-11-23 15:38:58,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:38:58,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-23 15:38:58,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 15:38:58,815 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:38:58,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:38:58,817 INFO L85 PathProgramCache]: Analyzing trace with hash 28894691, now seen corresponding path program 1 times [2023-11-23 15:38:58,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:38:58,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137461930] [2023-11-23 15:38:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:38:58,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:38:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:38:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:38:58,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:38:58,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137461930] [2023-11-23 15:38:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137461930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:38:58,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:38:58,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:38:58,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44680329] [2023-11-23 15:38:58,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:38:58,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:38:58,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:38:58,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:38:58,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:38:58,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 141 [2023-11-23 15:38:58,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 109 transitions, 229 flow. Second operand has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:58,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:38:58,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 141 [2023-11-23 15:38:58,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:38:59,207 INFO L124 PetriNetUnfolderBase]: 479/1162 cut-off events. [2023-11-23 15:38:59,207 INFO L125 PetriNetUnfolderBase]: For 5/7 co-relation queries the response was YES. [2023-11-23 15:38:59,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2141 conditions, 1162 events. 479/1162 cut-off events. For 5/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5864 event pairs, 255 based on Foata normal form. 0/779 useless extension candidates. Maximal degree in co-relation 2129. Up to 594 conditions per place. [2023-11-23 15:38:59,212 INFO L140 encePairwiseOnDemand]: 126/141 looper letters, 108 selfloop transitions, 10 changer transitions 0/144 dead transitions. [2023-11-23 15:38:59,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 144 transitions, 538 flow [2023-11-23 15:38:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:38:59,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:38:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 227 transitions. [2023-11-23 15:38:59,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024822695035461 [2023-11-23 15:38:59,214 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 227 transitions. [2023-11-23 15:38:59,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 227 transitions. [2023-11-23 15:38:59,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:38:59,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 227 transitions. [2023-11-23 15:38:59,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 56.75) internal successors, (227), 4 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,217 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,217 INFO L175 Difference]: Start difference. First operand has 105 places, 109 transitions, 229 flow. Second operand 4 states and 227 transitions. [2023-11-23 15:38:59,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 144 transitions, 538 flow [2023-11-23 15:38:59,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 534 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:38:59,222 INFO L231 Difference]: Finished difference. Result has 104 places, 108 transitions, 265 flow [2023-11-23 15:38:59,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=265, PETRI_PLACES=104, PETRI_TRANSITIONS=108} [2023-11-23 15:38:59,223 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -26 predicate places. [2023-11-23 15:38:59,223 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 108 transitions, 265 flow [2023-11-23 15:38:59,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.8) internal successors, (134), 5 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:38:59,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-23 15:38:59,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 15:38:59,224 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:38:59,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:38:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash 28894692, now seen corresponding path program 1 times [2023-11-23 15:38:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:38:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365201247] [2023-11-23 15:38:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:38:59,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:38:59,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:38:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:38:59,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:38:59,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365201247] [2023-11-23 15:38:59,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365201247] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:38:59,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:38:59,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:38:59,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984240688] [2023-11-23 15:38:59,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:38:59,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:38:59,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:38:59,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:38:59,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:38:59,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:38:59,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 108 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:38:59,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:38:59,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:38:59,608 INFO L124 PetriNetUnfolderBase]: 474/1198 cut-off events. [2023-11-23 15:38:59,609 INFO L125 PetriNetUnfolderBase]: For 32/34 co-relation queries the response was YES. [2023-11-23 15:38:59,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2245 conditions, 1198 events. 474/1198 cut-off events. For 32/34 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6349 event pairs, 80 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 2164. Up to 757 conditions per place. [2023-11-23 15:38:59,614 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 96 selfloop transitions, 5 changer transitions 0/131 dead transitions. [2023-11-23 15:38:59,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 131 transitions, 516 flow [2023-11-23 15:38:59,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:38:59,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:38:59,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 220 transitions. [2023-11-23 15:38:59,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3900709219858156 [2023-11-23 15:38:59,615 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 220 transitions. [2023-11-23 15:38:59,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 220 transitions. [2023-11-23 15:38:59,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:38:59,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 220 transitions. [2023-11-23 15:38:59,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 55.0) internal successors, (220), 4 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,618 INFO L175 Difference]: Start difference. First operand has 104 places, 108 transitions, 265 flow. Second operand 4 states and 220 transitions. [2023-11-23 15:38:59,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 131 transitions, 516 flow [2023-11-23 15:38:59,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 131 transitions, 510 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:38:59,621 INFO L231 Difference]: Finished difference. Result has 106 places, 109 transitions, 280 flow [2023-11-23 15:38:59,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=106, PETRI_TRANSITIONS=109} [2023-11-23 15:38:59,622 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -24 predicate places. [2023-11-23 15:38:59,622 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 109 transitions, 280 flow [2023-11-23 15:38:59,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:38:59,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:38:59,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 15:38:59,623 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:38:59,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:38:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1809299395, now seen corresponding path program 1 times [2023-11-23 15:38:59,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:38:59,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179625949] [2023-11-23 15:38:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:38:59,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:38:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:38:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:38:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:38:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179625949] [2023-11-23 15:38:59,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179625949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:38:59,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:38:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:38:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007738776] [2023-11-23 15:38:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:38:59,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:38:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:38:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:38:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:38:59,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:38:59,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 109 transitions, 280 flow. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:38:59,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:38:59,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:38:59,848 INFO L124 PetriNetUnfolderBase]: 474/1202 cut-off events. [2023-11-23 15:38:59,848 INFO L125 PetriNetUnfolderBase]: For 32/34 co-relation queries the response was YES. [2023-11-23 15:38:59,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2294 conditions, 1202 events. 474/1202 cut-off events. For 32/34 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6348 event pairs, 400 based on Foata normal form. 0/808 useless extension candidates. Maximal degree in co-relation 2200. Up to 946 conditions per place. [2023-11-23 15:38:59,854 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 79 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-11-23 15:38:59,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 113 transitions, 458 flow [2023-11-23 15:38:59,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:38:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:38:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 200 transitions. [2023-11-23 15:38:59,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3546099290780142 [2023-11-23 15:38:59,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 200 transitions. [2023-11-23 15:38:59,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 200 transitions. [2023-11-23 15:38:59,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:38:59,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 200 transitions. [2023-11-23 15:38:59,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,858 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,858 INFO L175 Difference]: Start difference. First operand has 106 places, 109 transitions, 280 flow. Second operand 4 states and 200 transitions. [2023-11-23 15:38:59,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 113 transitions, 458 flow [2023-11-23 15:38:59,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 113 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:38:59,861 INFO L231 Difference]: Finished difference. Result has 108 places, 110 transitions, 293 flow [2023-11-23 15:38:59,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=293, PETRI_PLACES=108, PETRI_TRANSITIONS=110} [2023-11-23 15:38:59,862 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -22 predicate places. [2023-11-23 15:38:59,878 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 110 transitions, 293 flow [2023-11-23 15:38:59,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:38:59,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:38:59,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:38:59,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 15:38:59,882 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:38:59,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:38:59,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1809299386, now seen corresponding path program 1 times [2023-11-23 15:38:59,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:38:59,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641404216] [2023-11-23 15:38:59,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:38:59,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:38:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:00,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:00,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641404216] [2023-11-23 15:39:00,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641404216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:00,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:00,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:39:00,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099529687] [2023-11-23 15:39:00,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:00,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:39:00,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:00,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:39:00,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:39:00,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:39:00,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 110 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:00,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:00,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:39:00,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:00,280 INFO L124 PetriNetUnfolderBase]: 474/1201 cut-off events. [2023-11-23 15:39:00,280 INFO L125 PetriNetUnfolderBase]: For 38/40 co-relation queries the response was YES. [2023-11-23 15:39:00,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 1201 events. 474/1201 cut-off events. For 38/40 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 6361 event pairs, 80 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 2237. Up to 757 conditions per place. [2023-11-23 15:39:00,285 INFO L140 encePairwiseOnDemand]: 134/141 looper letters, 98 selfloop transitions, 6 changer transitions 0/134 dead transitions. [2023-11-23 15:39:00,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 134 transitions, 554 flow [2023-11-23 15:39:00,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:39:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:39:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 253 transitions. [2023-11-23 15:39:00,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3588652482269504 [2023-11-23 15:39:00,287 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 253 transitions. [2023-11-23 15:39:00,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 253 transitions. [2023-11-23 15:39:00,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:00,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 253 transitions. [2023-11-23 15:39:00,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 50.6) internal successors, (253), 5 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:00,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:00,289 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:00,289 INFO L175 Difference]: Start difference. First operand has 108 places, 110 transitions, 293 flow. Second operand 5 states and 253 transitions. [2023-11-23 15:39:00,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 134 transitions, 554 flow [2023-11-23 15:39:00,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 134 transitions, 548 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:39:00,292 INFO L231 Difference]: Finished difference. Result has 112 places, 111 transitions, 311 flow [2023-11-23 15:39:00,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=112, PETRI_TRANSITIONS=111} [2023-11-23 15:39:00,293 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -18 predicate places. [2023-11-23 15:39:00,293 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 111 transitions, 311 flow [2023-11-23 15:39:00,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:00,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:00,293 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:00,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 15:39:00,294 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:00,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:00,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1000583597, now seen corresponding path program 1 times [2023-11-23 15:39:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:00,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653759226] [2023-11-23 15:39:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:00,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:00,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653759226] [2023-11-23 15:39:00,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653759226] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:39:00,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128769765] [2023-11-23 15:39:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:00,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:39:00,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:39:00,448 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:39:00,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 15:39:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:00,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 15:39:00,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:39:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:00,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:39:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:00,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128769765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:39:00,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:39:00,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-23 15:39:00,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499876560] [2023-11-23 15:39:00,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:39:00,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 15:39:00,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 15:39:00,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-23 15:39:00,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:39:00,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 111 transitions, 311 flow. Second operand has 14 states, 14 states have (on average 32.142857142857146) internal successors, (450), 14 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:00,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:00,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:39:00,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:01,357 INFO L124 PetriNetUnfolderBase]: 477/1222 cut-off events. [2023-11-23 15:39:01,357 INFO L125 PetriNetUnfolderBase]: For 58/60 co-relation queries the response was YES. [2023-11-23 15:39:01,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2369 conditions, 1222 events. 477/1222 cut-off events. For 58/60 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6529 event pairs, 80 based on Foata normal form. 3/831 useless extension candidates. Maximal degree in co-relation 2325. Up to 757 conditions per place. [2023-11-23 15:39:01,362 INFO L140 encePairwiseOnDemand]: 131/141 looper letters, 103 selfloop transitions, 22 changer transitions 0/155 dead transitions. [2023-11-23 15:39:01,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 155 transitions, 694 flow [2023-11-23 15:39:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 15:39:01,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-23 15:39:01,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 516 transitions. [2023-11-23 15:39:01,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.281505728314239 [2023-11-23 15:39:01,364 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 516 transitions. [2023-11-23 15:39:01,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 516 transitions. [2023-11-23 15:39:01,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:01,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 516 transitions. [2023-11-23 15:39:01,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 39.69230769230769) internal successors, (516), 13 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:01,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 141.0) internal successors, (1974), 14 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:01,367 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 141.0) internal successors, (1974), 14 states have internal predecessors, (1974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:01,367 INFO L175 Difference]: Start difference. First operand has 112 places, 111 transitions, 311 flow. Second operand 13 states and 516 transitions. [2023-11-23 15:39:01,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 155 transitions, 694 flow [2023-11-23 15:39:01,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 155 transitions, 689 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:39:01,370 INFO L231 Difference]: Finished difference. Result has 126 places, 124 transitions, 436 flow [2023-11-23 15:39:01,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=436, PETRI_PLACES=126, PETRI_TRANSITIONS=124} [2023-11-23 15:39:01,371 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -4 predicate places. [2023-11-23 15:39:01,371 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 124 transitions, 436 flow [2023-11-23 15:39:01,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 32.142857142857146) internal successors, (450), 14 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:01,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:01,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:01,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 15:39:01,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:39:01,583 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:01,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:01,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1000583588, now seen corresponding path program 1 times [2023-11-23 15:39:01,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:01,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736028456] [2023-11-23 15:39:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:01,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:01,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736028456] [2023-11-23 15:39:01,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736028456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:39:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459364785] [2023-11-23 15:39:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:01,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:39:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:39:01,648 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:39:01,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 15:39:01,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:01,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 15:39:01,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:39:01,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:01,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:39:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:01,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459364785] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:39:01,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:39:01,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-11-23 15:39:01,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633454406] [2023-11-23 15:39:01,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:39:01,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 15:39:01,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 15:39:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-23 15:39:01,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:39:01,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 124 transitions, 436 flow. Second operand has 10 states, 10 states have (on average 32.4) internal successors, (324), 10 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:01,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:01,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:39:01,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:02,031 INFO L124 PetriNetUnfolderBase]: 476/1218 cut-off events. [2023-11-23 15:39:02,031 INFO L125 PetriNetUnfolderBase]: For 106/108 co-relation queries the response was YES. [2023-11-23 15:39:02,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1218 events. 476/1218 cut-off events. For 106/108 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6475 event pairs, 400 based on Foata normal form. 1/829 useless extension candidates. Maximal degree in co-relation 2351. Up to 948 conditions per place. [2023-11-23 15:39:02,054 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 80 selfloop transitions, 13 changer transitions 0/123 dead transitions. [2023-11-23 15:39:02,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 123 transitions, 615 flow [2023-11-23 15:39:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 15:39:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-23 15:39:02,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 230 transitions. [2023-11-23 15:39:02,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3262411347517731 [2023-11-23 15:39:02,055 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 230 transitions. [2023-11-23 15:39:02,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 230 transitions. [2023-11-23 15:39:02,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:02,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 230 transitions. [2023-11-23 15:39:02,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 46.0) internal successors, (230), 5 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,058 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 141.0) internal successors, (846), 6 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,058 INFO L175 Difference]: Start difference. First operand has 126 places, 124 transitions, 436 flow. Second operand 5 states and 230 transitions. [2023-11-23 15:39:02,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 123 transitions, 615 flow [2023-11-23 15:39:02,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 123 transitions, 580 flow, removed 8 selfloop flow, removed 6 redundant places. [2023-11-23 15:39:02,062 INFO L231 Difference]: Finished difference. Result has 124 places, 122 transitions, 426 flow [2023-11-23 15:39:02,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=426, PETRI_PLACES=124, PETRI_TRANSITIONS=122} [2023-11-23 15:39:02,064 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -6 predicate places. [2023-11-23 15:39:02,064 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 122 transitions, 426 flow [2023-11-23 15:39:02,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 32.4) internal successors, (324), 10 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:02,064 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:02,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 15:39:02,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 15:39:02,276 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:02,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1311931101, now seen corresponding path program 2 times [2023-11-23 15:39:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:02,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765436407] [2023-11-23 15:39:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:02,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765436407] [2023-11-23 15:39:02,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765436407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:02,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:02,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:39:02,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659145948] [2023-11-23 15:39:02,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:02,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:39:02,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:02,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:39:02,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:39:02,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:39:02,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 122 transitions, 426 flow. Second operand has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:02,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:39:02,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:02,614 INFO L124 PetriNetUnfolderBase]: 476/1215 cut-off events. [2023-11-23 15:39:02,614 INFO L125 PetriNetUnfolderBase]: For 70/72 co-relation queries the response was YES. [2023-11-23 15:39:02,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 1215 events. 476/1215 cut-off events. For 70/72 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6456 event pairs, 400 based on Foata normal form. 3/828 useless extension candidates. Maximal degree in co-relation 2342. Up to 948 conditions per place. [2023-11-23 15:39:02,620 INFO L140 encePairwiseOnDemand]: 137/141 looper letters, 86 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2023-11-23 15:39:02,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 121 transitions, 606 flow [2023-11-23 15:39:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:39:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:39:02,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2023-11-23 15:39:02,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34574468085106386 [2023-11-23 15:39:02,621 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 195 transitions. [2023-11-23 15:39:02,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 195 transitions. [2023-11-23 15:39:02,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:02,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 195 transitions. [2023-11-23 15:39:02,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,624 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,624 INFO L175 Difference]: Start difference. First operand has 124 places, 122 transitions, 426 flow. Second operand 4 states and 195 transitions. [2023-11-23 15:39:02,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 121 transitions, 606 flow [2023-11-23 15:39:02,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 121 transitions, 600 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:39:02,627 INFO L231 Difference]: Finished difference. Result has 124 places, 121 transitions, 428 flow [2023-11-23 15:39:02,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=428, PETRI_PLACES=124, PETRI_TRANSITIONS=121} [2023-11-23 15:39:02,628 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -6 predicate places. [2023-11-23 15:39:02,629 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 121 transitions, 428 flow [2023-11-23 15:39:02,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.5) internal successors, (130), 4 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:02,630 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:02,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 15:39:02,630 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:02,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash 463887611, now seen corresponding path program 1 times [2023-11-23 15:39:02,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:02,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078996358] [2023-11-23 15:39:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:02,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:02,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:02,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078996358] [2023-11-23 15:39:02,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078996358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:02,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:02,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:39:02,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113631650] [2023-11-23 15:39:02,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:02,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:39:02,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:02,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:39:02,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:39:02,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 141 [2023-11-23 15:39:02,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 121 transitions, 428 flow. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:02,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 141 [2023-11-23 15:39:02,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:02,974 INFO L124 PetriNetUnfolderBase]: 595/1479 cut-off events. [2023-11-23 15:39:02,974 INFO L125 PetriNetUnfolderBase]: For 89/92 co-relation queries the response was YES. [2023-11-23 15:39:02,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 1479 events. 595/1479 cut-off events. For 89/92 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 8745 event pairs, 205 based on Foata normal form. 33/1057 useless extension candidates. Maximal degree in co-relation 2863. Up to 1024 conditions per place. [2023-11-23 15:39:02,980 INFO L140 encePairwiseOnDemand]: 131/141 looper letters, 124 selfloop transitions, 11 changer transitions 1/164 dead transitions. [2023-11-23 15:39:02,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 164 transitions, 795 flow [2023-11-23 15:39:02,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:39:02,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:39:02,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 237 transitions. [2023-11-23 15:39:02,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42021276595744683 [2023-11-23 15:39:02,982 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 237 transitions. [2023-11-23 15:39:02,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 237 transitions. [2023-11-23 15:39:02,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:02,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 237 transitions. [2023-11-23 15:39:02,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 59.25) internal successors, (237), 4 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,984 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,984 INFO L175 Difference]: Start difference. First operand has 124 places, 121 transitions, 428 flow. Second operand 4 states and 237 transitions. [2023-11-23 15:39:02,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 164 transitions, 795 flow [2023-11-23 15:39:02,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 164 transitions, 785 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-23 15:39:02,989 INFO L231 Difference]: Finished difference. Result has 126 places, 126 transitions, 487 flow [2023-11-23 15:39:02,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=487, PETRI_PLACES=126, PETRI_TRANSITIONS=126} [2023-11-23 15:39:02,989 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -4 predicate places. [2023-11-23 15:39:02,990 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 126 transitions, 487 flow [2023-11-23 15:39:02,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:02,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:02,990 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:02,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 15:39:02,990 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:02,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash 463887610, now seen corresponding path program 1 times [2023-11-23 15:39:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:02,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371315985] [2023-11-23 15:39:02,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:02,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:03,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:03,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371315985] [2023-11-23 15:39:03,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371315985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:03,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:03,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 15:39:03,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298800075] [2023-11-23 15:39:03,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:03,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:39:03,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:03,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:39:03,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:39:03,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 141 [2023-11-23 15:39:03,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 487 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:03,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 141 [2023-11-23 15:39:03,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:03,308 INFO L124 PetriNetUnfolderBase]: 641/1559 cut-off events. [2023-11-23 15:39:03,309 INFO L125 PetriNetUnfolderBase]: For 601/675 co-relation queries the response was YES. [2023-11-23 15:39:03,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3521 conditions, 1559 events. 641/1559 cut-off events. For 601/675 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 8910 event pairs, 235 based on Foata normal form. 101/1264 useless extension candidates. Maximal degree in co-relation 3468. Up to 795 conditions per place. [2023-11-23 15:39:03,316 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 149 selfloop transitions, 4 changer transitions 0/181 dead transitions. [2023-11-23 15:39:03,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 181 transitions, 918 flow [2023-11-23 15:39:03,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:39:03,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:39:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 222 transitions. [2023-11-23 15:39:03,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524822695035461 [2023-11-23 15:39:03,319 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 222 transitions. [2023-11-23 15:39:03,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 222 transitions. [2023-11-23 15:39:03,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:03,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 222 transitions. [2023-11-23 15:39:03,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,320 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,321 INFO L175 Difference]: Start difference. First operand has 126 places, 126 transitions, 487 flow. Second operand 3 states and 222 transitions. [2023-11-23 15:39:03,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 181 transitions, 918 flow [2023-11-23 15:39:03,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 181 transitions, 913 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:39:03,324 INFO L231 Difference]: Finished difference. Result has 128 places, 127 transitions, 506 flow [2023-11-23 15:39:03,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=506, PETRI_PLACES=128, PETRI_TRANSITIONS=127} [2023-11-23 15:39:03,325 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -2 predicate places. [2023-11-23 15:39:03,325 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 127 transitions, 506 flow [2023-11-23 15:39:03,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:03,325 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:03,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 15:39:03,325 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:03,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:03,326 INFO L85 PathProgramCache]: Analyzing trace with hash 533449338, now seen corresponding path program 2 times [2023-11-23 15:39:03,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:03,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314858260] [2023-11-23 15:39:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:03,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:03,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:03,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314858260] [2023-11-23 15:39:03,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314858260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:39:03,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439859302] [2023-11-23 15:39:03,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 15:39:03,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:39:03,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:39:03,452 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:39:03,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 15:39:03,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 15:39:03,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 15:39:03,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 15:39:03,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:39:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:03,598 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 15:39:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439859302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:03,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 15:39:03,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-23 15:39:03,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844883584] [2023-11-23 15:39:03,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:03,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 15:39:03,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:03,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 15:39:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:39:03,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 141 [2023-11-23 15:39:03,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 127 transitions, 506 flow. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:03,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 141 [2023-11-23 15:39:03,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:03,783 INFO L124 PetriNetUnfolderBase]: 530/1327 cut-off events. [2023-11-23 15:39:03,783 INFO L125 PetriNetUnfolderBase]: For 621/695 co-relation queries the response was YES. [2023-11-23 15:39:03,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3054 conditions, 1327 events. 530/1327 cut-off events. For 621/695 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7295 event pairs, 290 based on Foata normal form. 1/986 useless extension candidates. Maximal degree in co-relation 3037. Up to 1081 conditions per place. [2023-11-23 15:39:03,790 INFO L140 encePairwiseOnDemand]: 136/141 looper letters, 81 selfloop transitions, 5 changer transitions 0/116 dead transitions. [2023-11-23 15:39:03,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 116 transitions, 572 flow [2023-11-23 15:39:03,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:39:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:39:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 257 transitions. [2023-11-23 15:39:03,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3037825059101655 [2023-11-23 15:39:03,793 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 257 transitions. [2023-11-23 15:39:03,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 257 transitions. [2023-11-23 15:39:03,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:03,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 257 transitions. [2023-11-23 15:39:03,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 42.833333333333336) internal successors, (257), 6 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,796 INFO L175 Difference]: Start difference. First operand has 128 places, 127 transitions, 506 flow. Second operand 6 states and 257 transitions. [2023-11-23 15:39:03,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 116 transitions, 572 flow [2023-11-23 15:39:03,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 116 transitions, 541 flow, removed 2 selfloop flow, removed 10 redundant places. [2023-11-23 15:39:03,800 INFO L231 Difference]: Finished difference. Result has 120 places, 115 transitions, 377 flow [2023-11-23 15:39:03,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=120, PETRI_TRANSITIONS=115} [2023-11-23 15:39:03,801 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -10 predicate places. [2023-11-23 15:39:03,801 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 115 transitions, 377 flow [2023-11-23 15:39:03,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:03,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:03,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:03,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 15:39:04,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:39:04,016 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:04,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:04,017 INFO L85 PathProgramCache]: Analyzing trace with hash -119582292, now seen corresponding path program 1 times [2023-11-23 15:39:04,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:04,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388387119] [2023-11-23 15:39:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:04,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:04,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:04,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388387119] [2023-11-23 15:39:04,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388387119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 15:39:04,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88357001] [2023-11-23 15:39:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:04,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:39:04,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-23 15:39:04,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 15:39:04,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 15:39:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:04,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 15:39:04,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 15:39:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:04,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 15:39:04,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 15:39:04,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88357001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 15:39:04,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 15:39:04,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2023-11-23 15:39:04,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071408907] [2023-11-23 15:39:04,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 15:39:04,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 15:39:04,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:04,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 15:39:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2023-11-23 15:39:04,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 141 [2023-11-23 15:39:04,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 115 transitions, 377 flow. Second operand has 11 states, 11 states have (on average 30.636363636363637) internal successors, (337), 11 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:04,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:04,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 141 [2023-11-23 15:39:04,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:04,935 INFO L124 PetriNetUnfolderBase]: 923/2295 cut-off events. [2023-11-23 15:39:04,935 INFO L125 PetriNetUnfolderBase]: For 820/820 co-relation queries the response was YES. [2023-11-23 15:39:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5092 conditions, 2295 events. 923/2295 cut-off events. For 820/820 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 15719 event pairs, 400 based on Foata normal form. 34/1708 useless extension candidates. Maximal degree in co-relation 5079. Up to 1429 conditions per place. [2023-11-23 15:39:04,944 INFO L140 encePairwiseOnDemand]: 131/141 looper letters, 168 selfloop transitions, 13 changer transitions 0/207 dead transitions. [2023-11-23 15:39:04,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 207 transitions, 954 flow [2023-11-23 15:39:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 15:39:04,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-23 15:39:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 331 transitions. [2023-11-23 15:39:04,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3912529550827423 [2023-11-23 15:39:04,946 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 331 transitions. [2023-11-23 15:39:04,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 331 transitions. [2023-11-23 15:39:04,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:04,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 331 transitions. [2023-11-23 15:39:04,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.166666666666664) internal successors, (331), 6 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:04,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:04,948 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 141.0) internal successors, (987), 7 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:04,948 INFO L175 Difference]: Start difference. First operand has 120 places, 115 transitions, 377 flow. Second operand 6 states and 331 transitions. [2023-11-23 15:39:04,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 207 transitions, 954 flow [2023-11-23 15:39:04,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 207 transitions, 936 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-23 15:39:04,951 INFO L231 Difference]: Finished difference. Result has 123 places, 118 transitions, 423 flow [2023-11-23 15:39:04,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=423, PETRI_PLACES=123, PETRI_TRANSITIONS=118} [2023-11-23 15:39:04,952 INFO L281 CegarLoopForPetriNet]: 130 programPoint places, -7 predicate places. [2023-11-23 15:39:04,952 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 118 transitions, 423 flow [2023-11-23 15:39:04,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.636363636363637) internal successors, (337), 11 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:04,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:04,953 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:04,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 15:39:05,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 15:39:05,164 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 121 more)] === [2023-11-23 15:39:05,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash 587917315, now seen corresponding path program 1 times [2023-11-23 15:39:05,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:05,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733329210] [2023-11-23 15:39:05,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:05,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 15:39:05,198 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 15:39:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 15:39:05,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-23 15:39:05,237 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 15:39:05,238 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (123 of 124 remaining) [2023-11-23 15:39:05,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (122 of 124 remaining) [2023-11-23 15:39:05,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (121 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (120 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (119 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (118 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (117 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (116 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (115 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (114 of 124 remaining) [2023-11-23 15:39:05,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (113 of 124 remaining) [2023-11-23 15:39:05,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (112 of 124 remaining) [2023-11-23 15:39:05,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (111 of 124 remaining) [2023-11-23 15:39:05,241 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (110 of 124 remaining) [2023-11-23 15:39:05,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (109 of 124 remaining) [2023-11-23 15:39:05,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (108 of 124 remaining) [2023-11-23 15:39:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (107 of 124 remaining) [2023-11-23 15:39:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (106 of 124 remaining) [2023-11-23 15:39:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (105 of 124 remaining) [2023-11-23 15:39:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (104 of 124 remaining) [2023-11-23 15:39:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (103 of 124 remaining) [2023-11-23 15:39:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (102 of 124 remaining) [2023-11-23 15:39:05,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (101 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (100 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (99 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (98 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32ASSERT_VIOLATIONMEMORY_LEAK (97 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (96 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 124 remaining) [2023-11-23 15:39:05,244 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 124 remaining) [2023-11-23 15:39:05,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 124 remaining) [2023-11-23 15:39:05,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 124 remaining) [2023-11-23 15:39:05,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 124 remaining) [2023-11-23 15:39:05,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 124 remaining) [2023-11-23 15:39:05,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 124 remaining) [2023-11-23 15:39:05,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 124 remaining) [2023-11-23 15:39:05,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 124 remaining) [2023-11-23 15:39:05,246 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 124 remaining) [2023-11-23 15:39:05,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 124 remaining) [2023-11-23 15:39:05,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 124 remaining) [2023-11-23 15:39:05,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE (75 of 124 remaining) [2023-11-23 15:39:05,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 124 remaining) [2023-11-23 15:39:05,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 124 remaining) [2023-11-23 15:39:05,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 124 remaining) [2023-11-23 15:39:05,247 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE (70 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE (69 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 124 remaining) [2023-11-23 15:39:05,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 124 remaining) [2023-11-23 15:39:05,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 124 remaining) [2023-11-23 15:39:05,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 124 remaining) [2023-11-23 15:39:05,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 124 remaining) [2023-11-23 15:39:05,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 124 remaining) [2023-11-23 15:39:05,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 124 remaining) [2023-11-23 15:39:05,250 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 124 remaining) [2023-11-23 15:39:05,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr32ASSERT_VIOLATIONMEMORY_LEAK (42 of 124 remaining) [2023-11-23 15:39:05,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 124 remaining) [2023-11-23 15:39:05,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 124 remaining) [2023-11-23 15:39:05,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 124 remaining) [2023-11-23 15:39:05,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 124 remaining) [2023-11-23 15:39:05,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 124 remaining) [2023-11-23 15:39:05,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 124 remaining) [2023-11-23 15:39:05,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 124 remaining) [2023-11-23 15:39:05,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 124 remaining) [2023-11-23 15:39:05,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 124 remaining) [2023-11-23 15:39:05,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 124 remaining) [2023-11-23 15:39:05,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 124 remaining) [2023-11-23 15:39:05,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 124 remaining) [2023-11-23 15:39:05,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 124 remaining) [2023-11-23 15:39:05,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 124 remaining) [2023-11-23 15:39:05,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr54REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 124 remaining) [2023-11-23 15:39:05,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 124 remaining) [2023-11-23 15:39:05,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 124 remaining) [2023-11-23 15:39:05,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 124 remaining) [2023-11-23 15:39:05,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 124 remaining) [2023-11-23 15:39:05,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 124 remaining) [2023-11-23 15:39:05,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 124 remaining) [2023-11-23 15:39:05,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr44REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 124 remaining) [2023-11-23 15:39:05,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 124 remaining) [2023-11-23 15:39:05,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 124 remaining) [2023-11-23 15:39:05,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 124 remaining) [2023-11-23 15:39:05,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 124 remaining) [2023-11-23 15:39:05,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 124 remaining) [2023-11-23 15:39:05,257 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 124 remaining) [2023-11-23 15:39:05,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 15:39:05,258 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:05,260 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-23 15:39:05,260 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-23 15:39:05,314 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 15:39:05,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 248 transitions, 512 flow [2023-11-23 15:39:05,337 INFO L124 PetriNetUnfolderBase]: 28/284 cut-off events. [2023-11-23 15:39:05,337 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-23 15:39:05,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296 conditions, 284 events. 28/284 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1556 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 233. Up to 6 conditions per place. [2023-11-23 15:39:05,339 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 248 transitions, 512 flow [2023-11-23 15:39:05,343 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 248 transitions, 512 flow [2023-11-23 15:39:05,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 15:39:05,344 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=All, 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;@41a9ea95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 15:39:05,344 INFO L358 AbstractCegarLoop]: Starting to check reachability of 179 error locations. [2023-11-23 15:39:05,345 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-23 15:39:05,345 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-23 15:39:05,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-23 15:39:05,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:05,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 15:39:05,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2023-11-23 15:39:05,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash 37971, now seen corresponding path program 1 times [2023-11-23 15:39:05,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:05,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740589858] [2023-11-23 15:39:05,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:05,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:05,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:05,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740589858] [2023-11-23 15:39:05,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740589858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:05,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:05,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 15:39:05,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927701815] [2023-11-23 15:39:05,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:05,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:39:05,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:39:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:39:05,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 248 [2023-11-23 15:39:05,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 248 transitions, 512 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:05,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:05,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 248 [2023-11-23 15:39:05,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:08,750 INFO L124 PetriNetUnfolderBase]: 32410/52397 cut-off events. [2023-11-23 15:39:08,750 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2023-11-23 15:39:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100989 conditions, 52397 events. 32410/52397 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 392800 event pairs, 29064 based on Foata normal form. 1228/34054 useless extension candidates. Maximal degree in co-relation 99020. Up to 48332 conditions per place. [2023-11-23 15:39:08,986 INFO L140 encePairwiseOnDemand]: 187/248 looper letters, 134 selfloop transitions, 2 changer transitions 0/187 dead transitions. [2023-11-23 15:39:08,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 187 transitions, 662 flow [2023-11-23 15:39:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:39:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:39:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2023-11-23 15:39:08,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46774193548387094 [2023-11-23 15:39:08,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 348 transitions. [2023-11-23 15:39:08,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 348 transitions. [2023-11-23 15:39:08,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:08,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 348 transitions. [2023-11-23 15:39:08,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:08,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:08,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:08,991 INFO L175 Difference]: Start difference. First operand has 226 places, 248 transitions, 512 flow. Second operand 3 states and 348 transitions. [2023-11-23 15:39:08,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 187 transitions, 662 flow [2023-11-23 15:39:08,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 187 transitions, 662 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-23 15:39:08,995 INFO L231 Difference]: Finished difference. Result has 177 places, 187 transitions, 394 flow [2023-11-23 15:39:08,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=177, PETRI_TRANSITIONS=187} [2023-11-23 15:39:08,996 INFO L281 CegarLoopForPetriNet]: 226 programPoint places, -49 predicate places. [2023-11-23 15:39:08,996 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 187 transitions, 394 flow [2023-11-23 15:39:08,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:08,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:08,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-11-23 15:39:08,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 15:39:08,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2023-11-23 15:39:08,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:08,997 INFO L85 PathProgramCache]: Analyzing trace with hash 37972, now seen corresponding path program 1 times [2023-11-23 15:39:08,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:08,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91815942] [2023-11-23 15:39:08,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:08,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:09,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:09,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91815942] [2023-11-23 15:39:09,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91815942] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:09,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:09,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 15:39:09,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102920069] [2023-11-23 15:39:09,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:09,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 15:39:09,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:09,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 15:39:09,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 15:39:09,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 248 [2023-11-23 15:39:09,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 187 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:09,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:09,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 248 [2023-11-23 15:39:09,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:12,160 INFO L124 PetriNetUnfolderBase]: 32410/52396 cut-off events. [2023-11-23 15:39:12,161 INFO L125 PetriNetUnfolderBase]: For 440/440 co-relation queries the response was YES. [2023-11-23 15:39:12,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100990 conditions, 52396 events. 32410/52396 cut-off events. For 440/440 co-relation queries the response was YES. Maximal size of possible extension queue 1192. Compared 392676 event pairs, 29064 based on Foata normal form. 0/32826 useless extension candidates. Maximal degree in co-relation 100977. Up to 48332 conditions per place. [2023-11-23 15:39:12,558 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 133 selfloop transitions, 2 changer transitions 0/186 dead transitions. [2023-11-23 15:39:12,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 186 transitions, 662 flow [2023-11-23 15:39:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 15:39:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-23 15:39:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 289 transitions. [2023-11-23 15:39:12,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38844086021505375 [2023-11-23 15:39:12,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 289 transitions. [2023-11-23 15:39:12,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 289 transitions. [2023-11-23 15:39:12,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:12,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 289 transitions. [2023-11-23 15:39:12,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:12,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:12,562 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:12,562 INFO L175 Difference]: Start difference. First operand has 177 places, 187 transitions, 394 flow. Second operand 3 states and 289 transitions. [2023-11-23 15:39:12,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 186 transitions, 662 flow [2023-11-23 15:39:12,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 186 transitions, 658 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:39:12,565 INFO L231 Difference]: Finished difference. Result has 176 places, 186 transitions, 392 flow [2023-11-23 15:39:12,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=176, PETRI_TRANSITIONS=186} [2023-11-23 15:39:12,566 INFO L281 CegarLoopForPetriNet]: 226 programPoint places, -50 predicate places. [2023-11-23 15:39:12,566 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 186 transitions, 392 flow [2023-11-23 15:39:12,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:12,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:12,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-23 15:39:12,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 15:39:12,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2023-11-23 15:39:12,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash 36529123, now seen corresponding path program 1 times [2023-11-23 15:39:12,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:12,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342148112] [2023-11-23 15:39:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:12,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342148112] [2023-11-23 15:39:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342148112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:12,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:12,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:39:12,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875810730] [2023-11-23 15:39:12,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:12,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:39:12,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:12,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:39:12,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:39:12,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 248 [2023-11-23 15:39:12,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 186 transitions, 392 flow. Second operand has 5 states, 5 states have (on average 43.8) internal successors, (219), 5 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:12,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:12,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 248 [2023-11-23 15:39:12,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:19,223 INFO L124 PetriNetUnfolderBase]: 64969/106030 cut-off events. [2023-11-23 15:39:19,224 INFO L125 PetriNetUnfolderBase]: For 780/780 co-relation queries the response was YES. [2023-11-23 15:39:19,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202585 conditions, 106030 events. 64969/106030 cut-off events. For 780/780 co-relation queries the response was YES. Maximal size of possible extension queue 1845. Compared 863285 event pairs, 30791 based on Foata normal form. 0/67800 useless extension candidates. Maximal degree in co-relation 202572. Up to 50928 conditions per place. [2023-11-23 15:39:19,731 INFO L140 encePairwiseOnDemand]: 225/248 looper letters, 245 selfloop transitions, 16 changer transitions 0/304 dead transitions. [2023-11-23 15:39:19,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 304 transitions, 1161 flow [2023-11-23 15:39:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:39:19,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:39:19,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-11-23 15:39:19,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4435483870967742 [2023-11-23 15:39:19,733 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-11-23 15:39:19,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-11-23 15:39:19,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:19,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-11-23 15:39:19,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:19,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:19,736 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:19,736 INFO L175 Difference]: Start difference. First operand has 176 places, 186 transitions, 392 flow. Second operand 4 states and 440 transitions. [2023-11-23 15:39:19,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 304 transitions, 1161 flow [2023-11-23 15:39:19,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 304 transitions, 1157 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-23 15:39:19,740 INFO L231 Difference]: Finished difference. Result has 176 places, 193 transitions, 488 flow [2023-11-23 15:39:19,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=488, PETRI_PLACES=176, PETRI_TRANSITIONS=193} [2023-11-23 15:39:19,741 INFO L281 CegarLoopForPetriNet]: 226 programPoint places, -50 predicate places. [2023-11-23 15:39:19,741 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 193 transitions, 488 flow [2023-11-23 15:39:19,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 43.8) internal successors, (219), 5 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:19,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:19,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-23 15:39:19,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 15:39:19,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2023-11-23 15:39:19,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:19,742 INFO L85 PathProgramCache]: Analyzing trace with hash 36529124, now seen corresponding path program 1 times [2023-11-23 15:39:19,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:19,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534629695] [2023-11-23 15:39:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:19,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:19,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:19,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534629695] [2023-11-23 15:39:19,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534629695] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:19,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:19,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 15:39:19,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11356097] [2023-11-23 15:39:19,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:19,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 15:39:19,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:19,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 15:39:19,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 15:39:19,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 248 [2023-11-23 15:39:19,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 193 transitions, 488 flow. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:19,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:19,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 248 [2023-11-23 15:39:19,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-23 15:39:26,607 INFO L124 PetriNetUnfolderBase]: 62710/104169 cut-off events. [2023-11-23 15:39:26,608 INFO L125 PetriNetUnfolderBase]: For 5166/5166 co-relation queries the response was YES. [2023-11-23 15:39:26,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205668 conditions, 104169 events. 62710/104169 cut-off events. For 5166/5166 co-relation queries the response was YES. Maximal size of possible extension queue 1983. Compared 881755 event pairs, 18666 based on Foata normal form. 0/66805 useless extension candidates. Maximal degree in co-relation 201883. Up to 87644 conditions per place. [2023-11-23 15:39:27,061 INFO L140 encePairwiseOnDemand]: 240/248 looper letters, 175 selfloop transitions, 7 changer transitions 0/237 dead transitions. [2023-11-23 15:39:27,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 237 transitions, 951 flow [2023-11-23 15:39:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 15:39:27,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-23 15:39:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 381 transitions. [2023-11-23 15:39:27,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840725806451613 [2023-11-23 15:39:27,062 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 381 transitions. [2023-11-23 15:39:27,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 381 transitions. [2023-11-23 15:39:27,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-23 15:39:27,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 381 transitions. [2023-11-23 15:39:27,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.25) internal successors, (381), 4 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:27,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:27,065 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:27,065 INFO L175 Difference]: Start difference. First operand has 176 places, 193 transitions, 488 flow. Second operand 4 states and 381 transitions. [2023-11-23 15:39:27,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 237 transitions, 951 flow [2023-11-23 15:39:27,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 237 transitions, 945 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-23 15:39:27,072 INFO L231 Difference]: Finished difference. Result has 178 places, 196 transitions, 517 flow [2023-11-23 15:39:27,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=517, PETRI_PLACES=178, PETRI_TRANSITIONS=196} [2023-11-23 15:39:27,073 INFO L281 CegarLoopForPetriNet]: 226 programPoint places, -48 predicate places. [2023-11-23 15:39:27,073 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 196 transitions, 517 flow [2023-11-23 15:39:27,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:27,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-23 15:39:27,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 15:39:27,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-23 15:39:27,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 176 more)] === [2023-11-23 15:39:27,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 15:39:27,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1613642674, now seen corresponding path program 1 times [2023-11-23 15:39:27,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 15:39:27,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195460514] [2023-11-23 15:39:27,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 15:39:27,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 15:39:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 15:39:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 15:39:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 15:39:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195460514] [2023-11-23 15:39:27,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195460514] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 15:39:27,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 15:39:27,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 15:39:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069331361] [2023-11-23 15:39:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 15:39:27,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 15:39:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 15:39:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 15:39:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 15:39:27,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 248 [2023-11-23 15:39:27,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 196 transitions, 517 flow. Second operand has 5 states, 5 states have (on average 52.4) internal successors, (262), 5 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 15:39:27,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-23 15:39:27,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 248 [2023-11-23 15:39:27,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand