./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread-ext/01b_inc.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6ae2ee47 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-ext/01b_inc.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 a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-6ae2ee4-m [2023-11-22 16:41:10,406 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-22 16:41:10,487 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-22 16:41:10,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-22 16:41:10,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-22 16:41:10,532 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-22 16:41:10,534 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-22 16:41:10,535 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-22 16:41:10,535 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-22 16:41:10,540 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-22 16:41:10,541 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-22 16:41:10,541 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-22 16:41:10,542 INFO L153 SettingsManager]: * Use SBE=true [2023-11-22 16:41:10,543 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-22 16:41:10,543 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-22 16:41:10,544 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-22 16:41:10,544 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-22 16:41:10,544 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-22 16:41:10,544 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-22 16:41:10,545 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-22 16:41:10,545 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-22 16:41:10,545 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-22 16:41:10,546 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-22 16:41:10,546 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-22 16:41:10,546 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-22 16:41:10,546 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-22 16:41:10,547 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-22 16:41:10,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-22 16:41:10,548 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-22 16:41:10,548 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-22 16:41:10,549 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 16:41:10,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-22 16:41:10,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-22 16:41:10,550 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-22 16:41:10,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-22 16:41:10,550 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-22 16:41:10,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-22 16:41:10,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-22 16:41:10,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-22 16:41:10,551 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a50cd99e32ae608752174b749acce795b64973c8c13edb78d7146b3ab3630fc9 [2023-11-22 16:41:10,819 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-22 16:41:10,847 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-22 16:41:10,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-22 16:41:10,856 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-22 16:41:10,856 INFO L274 PluginConnector]: CDTParser initialized [2023-11-22 16:41:10,857 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-11-22 16:41:12,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-22 16:41:12,294 INFO L384 CDTParser]: Found 1 translation units. [2023-11-22 16:41:12,295 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/01b_inc.i [2023-11-22 16:41:12,307 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4cde82b/012adaf919264d38b24d7cf5d0e326fb/FLAG36360625a [2023-11-22 16:41:12,318 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de4cde82b/012adaf919264d38b24d7cf5d0e326fb [2023-11-22 16:41:12,320 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-22 16:41:12,322 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-22 16:41:12,323 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-22 16:41:12,323 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-22 16:41:12,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-22 16:41:12,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e5418c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12, skipping insertion in model container [2023-11-22 16:41:12,331 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,366 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-22 16:41:12,562 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 16:41:12,712 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 16:41:12,722 INFO L202 MainTranslator]: Completed pre-run [2023-11-22 16:41:12,746 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-11-22 16:41:12,769 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-22 16:41:12,799 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 16:41:12,799 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 16:41:12,799 WARN L675 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-11-22 16:41:12,806 INFO L206 MainTranslator]: Completed translation [2023-11-22 16:41:12,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12 WrapperNode [2023-11-22 16:41:12,807 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-22 16:41:12,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-22 16:41:12,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-22 16:41:12,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-22 16:41:12,815 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,830 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,851 INFO L138 Inliner]: procedures = 173, calls = 21, calls flagged for inlining = 8, calls inlined = 9, statements flattened = 64 [2023-11-22 16:41:12,851 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-22 16:41:12,852 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-22 16:41:12,852 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-22 16:41:12,852 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-22 16:41:12,860 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,860 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,876 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,878 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,882 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,892 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,894 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,895 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,897 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-22 16:41:12,898 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-22 16:41:12,898 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-22 16:41:12,898 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-22 16:41:12,899 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (1/1) ... [2023-11-22 16:41:12,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-22 16:41:12,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-22 16:41:12,932 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) [2023-11-22 16:41:12,933 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 [2023-11-22 16:41:12,975 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-22 16:41:12,975 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-22 16:41:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-22 16:41:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-22 16:41:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-22 16:41:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-22 16:41:12,976 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-22 16:41:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-22 16:41:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-22 16:41:12,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-22 16:41:12,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-22 16:41:12,978 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-22 16:41:13,086 INFO L241 CfgBuilder]: Building ICFG [2023-11-22 16:41:13,087 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-22 16:41:13,264 INFO L282 CfgBuilder]: Performing block encoding [2023-11-22 16:41:13,373 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-22 16:41:13,374 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-22 16:41:13,374 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:41:13 BoogieIcfgContainer [2023-11-22 16:41:13,375 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-22 16:41:13,377 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-22 16:41:13,377 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-22 16:41:13,380 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-22 16:41:13,380 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 04:41:12" (1/3) ... [2023-11-22 16:41:13,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d676d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:41:13, skipping insertion in model container [2023-11-22 16:41:13,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 04:41:12" (2/3) ... [2023-11-22 16:41:13,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d676d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 04:41:13, skipping insertion in model container [2023-11-22 16:41:13,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 04:41:13" (3/3) ... [2023-11-22 16:41:13,383 INFO L112 eAbstractionObserver]: Analyzing ICFG 01b_inc.i [2023-11-22 16:41:13,398 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-22 16:41:13,399 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-22 16:41:13,399 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-22 16:41:13,441 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 16:41:13,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 23 transitions, 50 flow [2023-11-22 16:41:13,491 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-11-22 16:41:13,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 16:41:13,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 30 events. 1/30 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 71 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2023-11-22 16:41:13,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 25 places, 23 transitions, 50 flow [2023-11-22 16:41:13,498 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 50 flow [2023-11-22 16:41:13,507 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 16:41:13,514 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;@7abd95c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 16:41:13,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-22 16:41:13,518 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 16:41:13,518 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-22 16:41:13,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 16:41:13,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:13,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:13,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-22 16:41:13,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:13,525 INFO L85 PathProgramCache]: Analyzing trace with hash 225433, now seen corresponding path program 1 times [2023-11-22 16:41:13,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:13,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645224274] [2023-11-22 16:41:13,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:13,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:13,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:13,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645224274] [2023-11-22 16:41:13,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645224274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:13,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:13,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:13,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553314754] [2023-11-22 16:41:13,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:13,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:13,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:13,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:13,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 23 [2023-11-22 16:41:13,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:13,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:13,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 23 [2023-11-22 16:41:13,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:13,927 INFO L124 PetriNetUnfolderBase]: 25/79 cut-off events. [2023-11-22 16:41:13,928 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 16:41:13,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 79 events. 25/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 21 based on Foata normal form. 0/75 useless extension candidates. Maximal degree in co-relation 125. Up to 56 conditions per place. [2023-11-22 16:41:13,932 INFO L140 encePairwiseOnDemand]: 20/23 looper letters, 11 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2023-11-22 16:41:13,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 66 flow [2023-11-22 16:41:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:13,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:13,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 38 transitions. [2023-11-22 16:41:13,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-11-22 16:41:13,944 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 38 transitions. [2023-11-22 16:41:13,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 38 transitions. [2023-11-22 16:41:13,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:13,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 38 transitions. [2023-11-22 16:41:13,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:13,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2023-11-22 16:41:13,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2023-11-22 16:41:13,955 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 50 flow. Second operand 3 states and 38 transitions. [2023-11-22 16:41:13,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 66 flow [2023-11-22 16:41:13,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 66 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 16:41:13,961 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2023-11-22 16:41:13,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-22 16:41:13,967 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2023-11-22 16:41:13,968 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2023-11-22 16:41:13,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:13,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:13,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:13,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-22 16:41:13,969 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-22 16:41:13,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:13,971 INFO L85 PathProgramCache]: Analyzing trace with hash 225434, now seen corresponding path program 1 times [2023-11-22 16:41:13,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:13,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173849594] [2023-11-22 16:41:13,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:13,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:14,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:14,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:14,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:14,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173849594] [2023-11-22 16:41:14,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173849594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:14,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:14,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:14,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19615118] [2023-11-22 16:41:14,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:14,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:14,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:14,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:14,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:14,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 23 [2023-11-22 16:41:14,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:14,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 23 [2023-11-22 16:41:14,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:14,167 INFO L124 PetriNetUnfolderBase]: 17/58 cut-off events. [2023-11-22 16:41:14,168 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-22 16:41:14,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 58 events. 17/58 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 156 event pairs, 14 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 98. Up to 40 conditions per place. [2023-11-22 16:41:14,169 INFO L140 encePairwiseOnDemand]: 21/23 looper letters, 10 selfloop transitions, 1 changer transitions 0/18 dead transitions. [2023-11-22 16:41:14,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 64 flow [2023-11-22 16:41:14,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:14,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:14,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2023-11-22 16:41:14,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2023-11-22 16:41:14,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 39 transitions. [2023-11-22 16:41:14,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 39 transitions. [2023-11-22 16:41:14,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:14,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 39 transitions. [2023-11-22 16:41:14,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2023-11-22 16:41:14,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 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) [2023-11-22 16:41:14,179 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 39 transitions. [2023-11-22 16:41:14,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 64 flow [2023-11-22 16:41:14,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 18 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 16:41:14,180 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 43 flow [2023-11-22 16:41:14,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=23, PETRI_DIFFERENCE_MINUEND_FLOW=41, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=43, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-11-22 16:41:14,181 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2023-11-22 16:41:14,182 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 43 flow [2023-11-22 16:41:14,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:14,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-22 16:41:14,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-22 16:41:14,183 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 3 more)] === [2023-11-22 16:41:14,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:14,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1202787258, now seen corresponding path program 1 times [2023-11-22 16:41:14,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:14,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888274487] [2023-11-22 16:41:14,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:14,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 16:41:14,221 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 16:41:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 16:41:14,250 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 16:41:14,253 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 16:41:14,255 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-22 16:41:14,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (4 of 6 remaining) [2023-11-22 16:41:14,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 6 remaining) [2023-11-22 16:41:14,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 6 remaining) [2023-11-22 16:41:14,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 6 remaining) [2023-11-22 16:41:14,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2023-11-22 16:41:14,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-22 16:41:14,260 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-22 16:41:14,263 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-22 16:41:14,263 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-22 16:41:14,296 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 16:41:14,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 36 transitions, 82 flow [2023-11-22 16:41:14,308 INFO L124 PetriNetUnfolderBase]: 2/51 cut-off events. [2023-11-22 16:41:14,308 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-22 16:41:14,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 51 events. 2/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 137 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2023-11-22 16:41:14,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 36 transitions, 82 flow [2023-11-22 16:41:14,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 36 transitions, 82 flow [2023-11-22 16:41:14,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 16:41:14,315 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;@7abd95c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 16:41:14,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-22 16:41:14,318 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 16:41:14,319 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-22 16:41:14,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 16:41:14,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:14,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:14,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-22 16:41:14,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:14,321 INFO L85 PathProgramCache]: Analyzing trace with hash 261181, now seen corresponding path program 1 times [2023-11-22 16:41:14,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:14,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945252783] [2023-11-22 16:41:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:14,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:14,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945252783] [2023-11-22 16:41:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945252783] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:14,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:14,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219721039] [2023-11-22 16:41:14,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:14,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:14,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:14,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 36 [2023-11-22 16:41:14,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:14,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 36 [2023-11-22 16:41:14,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:14,535 INFO L124 PetriNetUnfolderBase]: 441/915 cut-off events. [2023-11-22 16:41:14,535 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-22 16:41:14,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1649 conditions, 915 events. 441/915 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5030 event pairs, 413 based on Foata normal form. 0/838 useless extension candidates. Maximal degree in co-relation 517. Up to 704 conditions per place. [2023-11-22 16:41:14,546 INFO L140 encePairwiseOnDemand]: 33/36 looper letters, 19 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-11-22 16:41:14,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 32 transitions, 114 flow [2023-11-22 16:41:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:14,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:14,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2023-11-22 16:41:14,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2023-11-22 16:41:14,549 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 61 transitions. [2023-11-22 16:41:14,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 61 transitions. [2023-11-22 16:41:14,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:14,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 61 transitions. [2023-11-22 16:41:14,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,570 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,570 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 82 flow. Second operand 3 states and 61 transitions. [2023-11-22 16:41:14,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 32 transitions, 114 flow [2023-11-22 16:41:14,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 114 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 16:41:14,573 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 76 flow [2023-11-22 16:41:14,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-11-22 16:41:14,576 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-22 16:41:14,576 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 76 flow [2023-11-22 16:41:14,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:14,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:14,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-22 16:41:14,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-22 16:41:14,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:14,579 INFO L85 PathProgramCache]: Analyzing trace with hash 261182, now seen corresponding path program 1 times [2023-11-22 16:41:14,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:14,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903837713] [2023-11-22 16:41:14,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:14,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:14,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:14,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:14,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903837713] [2023-11-22 16:41:14,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903837713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:14,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:14,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:14,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431814265] [2023-11-22 16:41:14,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:14,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:14,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:14,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:14,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:14,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 36 [2023-11-22 16:41:14,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:14,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 36 [2023-11-22 16:41:14,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:14,726 INFO L124 PetriNetUnfolderBase]: 318/675 cut-off events. [2023-11-22 16:41:14,726 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-11-22 16:41:14,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1219 conditions, 675 events. 318/675 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3486 event pairs, 294 based on Foata normal form. 73/691 useless extension candidates. Maximal degree in co-relation 1211. Up to 512 conditions per place. [2023-11-22 16:41:14,731 INFO L140 encePairwiseOnDemand]: 34/36 looper letters, 18 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-11-22 16:41:14,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 112 flow [2023-11-22 16:41:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2023-11-22 16:41:14,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2023-11-22 16:41:14,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 62 transitions. [2023-11-22 16:41:14,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 62 transitions. [2023-11-22 16:41:14,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:14,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 62 transitions. [2023-11-22 16:41:14,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,738 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 76 flow. Second operand 3 states and 62 transitions. [2023-11-22 16:41:14,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 112 flow [2023-11-22 16:41:14,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 111 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 16:41:14,741 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 75 flow [2023-11-22 16:41:14,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-11-22 16:41:14,742 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -2 predicate places. [2023-11-22 16:41:14,743 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 75 flow [2023-11-22 16:41:14,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:14,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:41:14,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-22 16:41:14,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-22 16:41:14,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:14,747 INFO L85 PathProgramCache]: Analyzing trace with hash 105686354, now seen corresponding path program 1 times [2023-11-22 16:41:14,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:14,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117082761] [2023-11-22 16:41:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:14,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:14,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:14,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117082761] [2023-11-22 16:41:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117082761] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:14,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:14,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 16:41:14,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942286151] [2023-11-22 16:41:14,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:14,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:41:14,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:14,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:41:14,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:41:14,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 36 [2023-11-22 16:41:14,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 75 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:14,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:14,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 36 [2023-11-22 16:41:14,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:15,112 INFO L124 PetriNetUnfolderBase]: 441/960 cut-off events. [2023-11-22 16:41:15,113 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-11-22 16:41:15,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1772 conditions, 960 events. 441/960 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 5553 event pairs, 81 based on Foata normal form. 0/861 useless extension candidates. Maximal degree in co-relation 1763. Up to 255 conditions per place. [2023-11-22 16:41:15,118 INFO L140 encePairwiseOnDemand]: 28/36 looper letters, 48 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2023-11-22 16:41:15,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 65 transitions, 267 flow [2023-11-22 16:41:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 16:41:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 16:41:15,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2023-11-22 16:41:15,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5879629629629629 [2023-11-22 16:41:15,122 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 127 transitions. [2023-11-22 16:41:15,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 127 transitions. [2023-11-22 16:41:15,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:15,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 127 transitions. [2023-11-22 16:41:15,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 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) [2023-11-22 16:41:15,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:15,127 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 36.0) internal successors, (252), 7 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:15,127 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 75 flow. Second operand 6 states and 127 transitions. [2023-11-22 16:41:15,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 65 transitions, 267 flow [2023-11-22 16:41:15,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 65 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 16:41:15,129 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 130 flow [2023-11-22 16:41:15,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=36, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=130, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-11-22 16:41:15,130 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 6 predicate places. [2023-11-22 16:41:15,130 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 130 flow [2023-11-22 16:41:15,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:15,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:15,131 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-22 16:41:15,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-22 16:41:15,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-22 16:41:15,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1539629809, now seen corresponding path program 1 times [2023-11-22 16:41:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:15,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088641211] [2023-11-22 16:41:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 16:41:15,143 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 16:41:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 16:41:15,153 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 16:41:15,153 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 16:41:15,153 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-11-22 16:41:15,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (5 of 7 remaining) [2023-11-22 16:41:15,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-22 16:41:15,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-22 16:41:15,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (2 of 7 remaining) [2023-11-22 16:41:15,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2023-11-22 16:41:15,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-22 16:41:15,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-22 16:41:15,155 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-22 16:41:15,156 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-22 16:41:15,156 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-22 16:41:15,176 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 16:41:15,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 49 transitions, 116 flow [2023-11-22 16:41:15,183 INFO L124 PetriNetUnfolderBase]: 3/72 cut-off events. [2023-11-22 16:41:15,184 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-22 16:41:15,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 3/72 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 218 event pairs, 0 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-11-22 16:41:15,184 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 49 transitions, 116 flow [2023-11-22 16:41:15,185 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 49 transitions, 116 flow [2023-11-22 16:41:15,186 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 16:41:15,187 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;@7abd95c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 16:41:15,187 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-22 16:41:15,188 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 16:41:15,188 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-22 16:41:15,188 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 16:41:15,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:15,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:15,189 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 16:41:15,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:15,189 INFO L85 PathProgramCache]: Analyzing trace with hash 309838, now seen corresponding path program 1 times [2023-11-22 16:41:15,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:15,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289046455] [2023-11-22 16:41:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:15,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:15,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:15,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:15,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289046455] [2023-11-22 16:41:15,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289046455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:15,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:15,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:15,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758179239] [2023-11-22 16:41:15,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:15,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:15,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:15,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:15,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2023-11-22 16:41:15,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:15,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:15,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2023-11-22 16:41:15,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:15,995 INFO L124 PetriNetUnfolderBase]: 5561/9389 cut-off events. [2023-11-22 16:41:15,996 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-11-22 16:41:16,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17356 conditions, 9389 events. 5561/9389 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 65998 event pairs, 5341 based on Foata normal form. 0/8472 useless extension candidates. Maximal degree in co-relation 1653. Up to 7680 conditions per place. [2023-11-22 16:41:16,068 INFO L140 encePairwiseOnDemand]: 46/49 looper letters, 27 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2023-11-22 16:41:16,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 45 transitions, 164 flow [2023-11-22 16:41:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2023-11-22 16:41:16,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2023-11-22 16:41:16,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 84 transitions. [2023-11-22 16:41:16,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 84 transitions. [2023-11-22 16:41:16,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:16,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 84 transitions. [2023-11-22 16:41:16,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:16,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 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) [2023-11-22 16:41:16,073 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 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) [2023-11-22 16:41:16,074 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 116 flow. Second operand 3 states and 84 transitions. [2023-11-22 16:41:16,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 45 transitions, 164 flow [2023-11-22 16:41:16,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 45 transitions, 162 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-11-22 16:41:16,078 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 108 flow [2023-11-22 16:41:16,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-22 16:41:16,080 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-22 16:41:16,080 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 108 flow [2023-11-22 16:41:16,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:16,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:16,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:16,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-22 16:41:16,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 16:41:16,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash 309839, now seen corresponding path program 1 times [2023-11-22 16:41:16,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:16,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750572478] [2023-11-22 16:41:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:16,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:16,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:16,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750572478] [2023-11-22 16:41:16,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750572478] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:16,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:16,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:16,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246676151] [2023-11-22 16:41:16,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:16,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:16,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:16,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2023-11-22 16:41:16,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:16,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:16,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2023-11-22 16:41:16,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:16,745 INFO L124 PetriNetUnfolderBase]: 4067/6946 cut-off events. [2023-11-22 16:41:16,745 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-22 16:41:16,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12803 conditions, 6946 events. 4067/6946 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47005 event pairs, 3878 based on Foata normal form. 585/6844 useless extension candidates. Maximal degree in co-relation 12794. Up to 5632 conditions per place. [2023-11-22 16:41:16,798 INFO L140 encePairwiseOnDemand]: 47/49 looper letters, 26 selfloop transitions, 1 changer transitions 0/44 dead transitions. [2023-11-22 16:41:16,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 44 transitions, 160 flow [2023-11-22 16:41:16,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:16,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:16,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2023-11-22 16:41:16,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2023-11-22 16:41:16,800 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 85 transitions. [2023-11-22 16:41:16,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 85 transitions. [2023-11-22 16:41:16,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:16,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 85 transitions. [2023-11-22 16:41:16,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:16,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 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) [2023-11-22 16:41:16,802 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 49.0) internal successors, (196), 4 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) [2023-11-22 16:41:16,802 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 108 flow. Second operand 3 states and 85 transitions. [2023-11-22 16:41:16,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 44 transitions, 160 flow [2023-11-22 16:41:16,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 44 transitions, 159 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 16:41:16,804 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 107 flow [2023-11-22 16:41:16,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2023-11-22 16:41:16,805 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -2 predicate places. [2023-11-22 16:41:16,805 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 107 flow [2023-11-22 16:41:16,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:16,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:16,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:41:16,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-22 16:41:16,806 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 16:41:16,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash -53396738, now seen corresponding path program 1 times [2023-11-22 16:41:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:16,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128905410] [2023-11-22 16:41:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:16,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:16,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:16,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128905410] [2023-11-22 16:41:16,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128905410] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:16,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:16,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 16:41:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447296680] [2023-11-22 16:41:16,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:41:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:41:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:41:16,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-22 16:41:16,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:16,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:16,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-22 16:41:16,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:18,111 INFO L124 PetriNetUnfolderBase]: 9507/16255 cut-off events. [2023-11-22 16:41:18,111 INFO L125 PetriNetUnfolderBase]: For 343/343 co-relation queries the response was YES. [2023-11-22 16:41:18,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30292 conditions, 16255 events. 9507/16255 cut-off events. For 343/343 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 124755 event pairs, 2493 based on Foata normal form. 0/13960 useless extension candidates. Maximal degree in co-relation 30282. Up to 5955 conditions per place. [2023-11-22 16:41:18,342 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 97 selfloop transitions, 12 changer transitions 0/120 dead transitions. [2023-11-22 16:41:18,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 120 transitions, 507 flow [2023-11-22 16:41:18,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 16:41:18,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 16:41:18,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2023-11-22 16:41:18,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2023-11-22 16:41:18,345 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 199 transitions. [2023-11-22 16:41:18,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 199 transitions. [2023-11-22 16:41:18,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:18,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 199 transitions. [2023-11-22 16:41:18,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 33.166666666666664) internal successors, (199), 6 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:18,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:18,348 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:18,348 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 107 flow. Second operand 6 states and 199 transitions. [2023-11-22 16:41:18,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 120 transitions, 507 flow [2023-11-22 16:41:18,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 120 transitions, 506 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 16:41:18,352 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 197 flow [2023-11-22 16:41:18,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2023-11-22 16:41:18,355 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-11-22 16:41:18,355 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 197 flow [2023-11-22 16:41:18,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:18,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:18,358 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:41:18,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-22 16:41:18,358 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 16:41:18,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:18,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1953470819, now seen corresponding path program 1 times [2023-11-22 16:41:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:18,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546303516] [2023-11-22 16:41:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:18,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 16:41:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:18,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546303516] [2023-11-22 16:41:18,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546303516] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:18,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:18,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 16:41:18,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020272056] [2023-11-22 16:41:18,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:18,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:41:18,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:18,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:41:18,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:41:18,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2023-11-22 16:41:18,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:18,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:18,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2023-11-22 16:41:18,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:20,239 INFO L124 PetriNetUnfolderBase]: 12954/22252 cut-off events. [2023-11-22 16:41:20,239 INFO L125 PetriNetUnfolderBase]: For 5831/5831 co-relation queries the response was YES. [2023-11-22 16:41:20,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47079 conditions, 22252 events. 12954/22252 cut-off events. For 5831/5831 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 181216 event pairs, 3843 based on Foata normal form. 0/20644 useless extension candidates. Maximal degree in co-relation 47064. Up to 9006 conditions per place. [2023-11-22 16:41:20,402 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 102 selfloop transitions, 19 changer transitions 0/132 dead transitions. [2023-11-22 16:41:20,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 132 transitions, 689 flow [2023-11-22 16:41:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 16:41:20,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 16:41:20,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2023-11-22 16:41:20,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2023-11-22 16:41:20,404 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 193 transitions. [2023-11-22 16:41:20,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 193 transitions. [2023-11-22 16:41:20,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:20,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 193 transitions. [2023-11-22 16:41:20,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 32.166666666666664) internal successors, (193), 6 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:20,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:20,406 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 49.0) internal successors, (343), 7 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:20,406 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 197 flow. Second operand 6 states and 193 transitions. [2023-11-22 16:41:20,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 132 transitions, 689 flow [2023-11-22 16:41:20,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 132 transitions, 689 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-22 16:41:20,440 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 327 flow [2023-11-22 16:41:20,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2023-11-22 16:41:20,441 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 13 predicate places. [2023-11-22 16:41:20,442 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 327 flow [2023-11-22 16:41:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:20,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:20,442 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-22 16:41:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-22 16:41:20,442 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-22 16:41:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 827519157, now seen corresponding path program 1 times [2023-11-22 16:41:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:20,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337013908] [2023-11-22 16:41:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 16:41:20,454 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-22 16:41:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-22 16:41:20,463 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-22 16:41:20,463 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-22 16:41:20,463 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-11-22 16:41:20,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (6 of 8 remaining) [2023-11-22 16:41:20,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-22 16:41:20,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-22 16:41:20,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (3 of 8 remaining) [2023-11-22 16:41:20,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2023-11-22 16:41:20,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2023-11-22 16:41:20,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-22 16:41:20,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-22 16:41:20,465 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-22 16:41:20,466 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-22 16:41:20,466 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-22 16:41:20,486 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-22 16:41:20,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 62 transitions, 152 flow [2023-11-22 16:41:20,495 INFO L124 PetriNetUnfolderBase]: 4/93 cut-off events. [2023-11-22 16:41:20,495 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-11-22 16:41:20,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 93 events. 4/93 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 293 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 84. Up to 5 conditions per place. [2023-11-22 16:41:20,496 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 62 transitions, 152 flow [2023-11-22 16:41:20,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 67 places, 62 transitions, 152 flow [2023-11-22 16:41:20,498 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-22 16:41:20,498 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;@7abd95c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-22 16:41:20,498 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-22 16:41:20,499 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-22 16:41:20,499 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2023-11-22 16:41:20,499 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-22 16:41:20,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:20,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:20,500 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-22 16:41:20,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash 371404, now seen corresponding path program 1 times [2023-11-22 16:41:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:20,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058421505] [2023-11-22 16:41:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:20,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:20,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:20,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:20,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058421505] [2023-11-22 16:41:20,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058421505] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:20,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:20,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455931806] [2023-11-22 16:41:20,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:20,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:20,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:20,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:20,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 62 [2023-11-22 16:41:20,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:20,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:20,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 62 [2023-11-22 16:41:20,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:26,428 INFO L124 PetriNetUnfolderBase]: 60857/91516 cut-off events. [2023-11-22 16:41:26,428 INFO L125 PetriNetUnfolderBase]: For 7620/7620 co-relation queries the response was YES. [2023-11-22 16:41:26,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172188 conditions, 91516 events. 60857/91516 cut-off events. For 7620/7620 co-relation queries the response was YES. Maximal size of possible extension queue 3458. Compared 732395 event pairs, 59101 based on Foata normal form. 0/81831 useless extension candidates. Maximal degree in co-relation 17423. Up to 77824 conditions per place. [2023-11-22 16:41:27,104 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 35 selfloop transitions, 1 changer transitions 0/58 dead transitions. [2023-11-22 16:41:27,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 216 flow [2023-11-22 16:41:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:27,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2023-11-22 16:41:27,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752688172043011 [2023-11-22 16:41:27,105 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 107 transitions. [2023-11-22 16:41:27,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 107 transitions. [2023-11-22 16:41:27,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:27,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 107 transitions. [2023-11-22 16:41:27,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:27,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:27,107 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:27,107 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 152 flow. Second operand 3 states and 107 transitions. [2023-11-22 16:41:27,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 216 flow [2023-11-22 16:41:27,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 210 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-11-22 16:41:27,113 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 140 flow [2023-11-22 16:41:27,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-22 16:41:27,114 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-11-22 16:41:27,114 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 140 flow [2023-11-22 16:41:27,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:27,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:27,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-22 16:41:27,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-22 16:41:27,115 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-22 16:41:27,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash 371405, now seen corresponding path program 1 times [2023-11-22 16:41:27,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:27,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563432435] [2023-11-22 16:41:27,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:27,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:27,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:27,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:27,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563432435] [2023-11-22 16:41:27,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563432435] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:27,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:27,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-22 16:41:27,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112200869] [2023-11-22 16:41:27,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:27,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-22 16:41:27,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:27,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-22 16:41:27,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-22 16:41:27,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 62 [2023-11-22 16:41:27,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:27,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:27,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 62 [2023-11-22 16:41:27,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:30,937 INFO L124 PetriNetUnfolderBase]: 44808/67868 cut-off events. [2023-11-22 16:41:30,937 INFO L125 PetriNetUnfolderBase]: For 1759/1759 co-relation queries the response was YES. [2023-11-22 16:41:31,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126974 conditions, 67868 events. 44808/67868 cut-off events. For 1759/1759 co-relation queries the response was YES. Maximal size of possible extension queue 2603. Compared 528747 event pairs, 43302 based on Foata normal form. 4681/65280 useless extension candidates. Maximal degree in co-relation 126964. Up to 57344 conditions per place. [2023-11-22 16:41:31,436 INFO L140 encePairwiseOnDemand]: 60/62 looper letters, 34 selfloop transitions, 1 changer transitions 0/57 dead transitions. [2023-11-22 16:41:31,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 208 flow [2023-11-22 16:41:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-22 16:41:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-22 16:41:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2023-11-22 16:41:31,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2023-11-22 16:41:31,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 108 transitions. [2023-11-22 16:41:31,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 108 transitions. [2023-11-22 16:41:31,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:31,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 108 transitions. [2023-11-22 16:41:31,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:31,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:31,440 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:31,440 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 140 flow. Second operand 3 states and 108 transitions. [2023-11-22 16:41:31,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 208 flow [2023-11-22 16:41:31,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 207 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 16:41:31,442 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 139 flow [2023-11-22 16:41:31,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=139, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2023-11-22 16:41:31,443 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2023-11-22 16:41:31,443 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 139 flow [2023-11-22 16:41:31,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:31,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:31,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:41:31,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-22 16:41:31,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-22 16:41:31,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:31,445 INFO L85 PathProgramCache]: Analyzing trace with hash 79670602, now seen corresponding path program 1 times [2023-11-22 16:41:31,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:31,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263163157] [2023-11-22 16:41:31,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:31,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-22 16:41:31,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263163157] [2023-11-22 16:41:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263163157] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:31,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:31,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 16:41:31,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404123265] [2023-11-22 16:41:31,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:31,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:41:31,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:31,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:41:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:41:31,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2023-11-22 16:41:31,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:31,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:31,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2023-11-22 16:41:31,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-22 16:41:44,087 INFO L124 PetriNetUnfolderBase]: 154743/230810 cut-off events. [2023-11-22 16:41:44,087 INFO L125 PetriNetUnfolderBase]: For 4318/4318 co-relation queries the response was YES. [2023-11-22 16:41:44,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436464 conditions, 230810 events. 154743/230810 cut-off events. For 4318/4318 co-relation queries the response was YES. Maximal size of possible extension queue 8114. Compared 1959340 event pairs, 47541 based on Foata normal form. 0/193919 useless extension candidates. Maximal degree in co-relation 436453. Up to 95643 conditions per place. [2023-11-22 16:41:45,569 INFO L140 encePairwiseOnDemand]: 50/62 looper letters, 134 selfloop transitions, 15 changer transitions 0/163 dead transitions. [2023-11-22 16:41:45,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 163 transitions, 699 flow [2023-11-22 16:41:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-22 16:41:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-22 16:41:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 259 transitions. [2023-11-22 16:41:45,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.696236559139785 [2023-11-22 16:41:45,571 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 259 transitions. [2023-11-22 16:41:45,571 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 259 transitions. [2023-11-22 16:41:45,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-22 16:41:45,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 259 transitions. [2023-11-22 16:41:45,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 43.166666666666664) internal successors, (259), 6 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:45,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:45,573 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:45,573 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 139 flow. Second operand 6 states and 259 transitions. [2023-11-22 16:41:45,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 163 transitions, 699 flow [2023-11-22 16:41:45,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 163 transitions, 698 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-22 16:41:45,578 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 256 flow [2023-11-22 16:41:45,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2023-11-22 16:41:45,579 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 6 predicate places. [2023-11-22 16:41:45,579 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 256 flow [2023-11-22 16:41:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:45,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-22 16:41:45,580 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-22 16:41:45,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-22 16:41:45,580 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-22 16:41:45,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-22 16:41:45,580 INFO L85 PathProgramCache]: Analyzing trace with hash -233637515, now seen corresponding path program 1 times [2023-11-22 16:41:45,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-22 16:41:45,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048534931] [2023-11-22 16:41:45,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-22 16:41:45,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-22 16:41:45,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-22 16:41:45,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-22 16:41:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-22 16:41:45,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048534931] [2023-11-22 16:41:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048534931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-22 16:41:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-22 16:41:45,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-22 16:41:45,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304944603] [2023-11-22 16:41:45,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-22 16:41:45,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-22 16:41:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-22 16:41:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-22 16:41:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-22 16:41:45,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2023-11-22 16:41:45,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 256 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-22 16:41:45,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-22 16:41:45,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2023-11-22 16:41:45,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand