/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:14:58,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:14:58,243 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 11:14:58,248 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:14:58,248 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:14:58,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:14:58,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:14:58,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:14:58,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:14:58,278 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:14:58,279 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:14:58,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:14:58,279 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:14:58,280 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:14:58,281 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:14:58,281 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:14:58,281 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:14:58,281 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:14:58,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:14:58,282 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:14:58,282 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:14:58,283 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:14:58,283 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:14:58,283 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:14:58,283 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:14:58,284 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:14:58,284 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:14:58,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:14:58,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:14:58,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:14:58,285 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:14:58,285 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:14:58,286 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:14:58,286 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:14:58,286 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:14:58,286 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:14:58,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:14:58,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:14:58,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:14:58,584 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:14:58,584 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:14:58,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-24 11:14:59,641 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:14:59,923 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:14:59,923 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-24 11:14:59,946 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c92f3c2/4a427bbd2b00463699669d77a6c7d8f4/FLAGc560571f5 [2023-08-24 11:14:59,959 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5c92f3c2/4a427bbd2b00463699669d77a6c7d8f4 [2023-08-24 11:14:59,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:14:59,964 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:14:59,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:14:59,967 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:14:59,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:14:59,977 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:14:59" (1/1) ... [2023-08-24 11:14:59,978 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67eaf03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:14:59, skipping insertion in model container [2023-08-24 11:14:59,978 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:14:59" (1/1) ... [2023-08-24 11:15:00,023 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:15:00,152 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 11:15:00,287 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-08-24 11:15:00,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:15:00,306 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:15:00,329 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 11:15:00,333 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-24 11:15:00,335 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-24 11:15:00,353 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-08-24 11:15:00,357 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:15:00,387 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:15:00,388 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:15:00,388 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:15:00,394 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:15:00,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00 WrapperNode [2023-08-24 11:15:00,394 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:15:00,395 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:15:00,395 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:15:00,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:15:00,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,430 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,456 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-24 11:15:00,457 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:15:00,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:15:00,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:15:00,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:15:00,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,486 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,488 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:15:00,500 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:15:00,500 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:15:00,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:15:00,501 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (1/1) ... [2023-08-24 11:15:00,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:15:00,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:15:00,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 11:15:00,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 11:15:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 11:15:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:15:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 11:15:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:15:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-08-24 11:15:00,579 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-08-24 11:15:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:15:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:15:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:15:00,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 11:15:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:15:00,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:15:00,582 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-08-24 11:15:00,582 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-08-24 11:15:00,584 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 11:15:00,723 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:15:00,725 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:15:00,931 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:15:00,960 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:15:00,960 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 11:15:00,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:15:00 BoogieIcfgContainer [2023-08-24 11:15:00,967 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:15:00,969 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:15:00,970 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:15:00,972 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:15:00,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:14:59" (1/3) ... [2023-08-24 11:15:00,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79027b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:15:00, skipping insertion in model container [2023-08-24 11:15:00,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:15:00" (2/3) ... [2023-08-24 11:15:00,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79027b1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:15:00, skipping insertion in model container [2023-08-24 11:15:00,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:15:00" (3/3) ... [2023-08-24 11:15:00,975 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-08-24 11:15:00,988 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:15:00,988 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 11:15:00,988 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:15:01,088 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 11:15:01,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2023-08-24 11:15:01,192 INFO L124 PetriNetUnfolderBase]: 2/106 cut-off events. [2023-08-24 11:15:01,193 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 11:15:01,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 2/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-08-24 11:15:01,199 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 252 flow [2023-08-24 11:15:01,203 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 207 flow [2023-08-24 11:15:01,206 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:15:01,225 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-24 11:15:01,232 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-24 11:15:01,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 93 transitions, 207 flow [2023-08-24 11:15:01,262 INFO L124 PetriNetUnfolderBase]: 2/93 cut-off events. [2023-08-24 11:15:01,262 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 11:15:01,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 93 events. 2/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-08-24 11:15:01,265 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2023-08-24 11:15:03,839 INFO L134 LiptonReduction]: Checked pairs total: 8742 [2023-08-24 11:15:03,839 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-24 11:15:03,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:15:03,856 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@31e6be18, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:15:03,856 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 11:15:03,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:15:03,862 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-24 11:15:03,862 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:15:03,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:03,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:03,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:03,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:03,867 INFO L85 PathProgramCache]: Analyzing trace with hash -71968847, now seen corresponding path program 1 times [2023-08-24 11:15:03,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:03,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100372426] [2023-08-24 11:15:03,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:03,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:15:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:15:04,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:15:04,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100372426] [2023-08-24 11:15:04,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100372426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:15:04,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:15:04,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:15:04,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293329973] [2023-08-24 11:15:04,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:15:04,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:15:04,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:15:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:15:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:15:04,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 11:15:04,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:04,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:15:04,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 11:15:04,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:15:06,192 INFO L124 PetriNetUnfolderBase]: 17327/24636 cut-off events. [2023-08-24 11:15:06,192 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-24 11:15:06,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50007 conditions, 24636 events. 17327/24636 cut-off events. For 2277/2277 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 144373 event pairs, 2851 based on Foata normal form. 0/23206 useless extension candidates. Maximal degree in co-relation 39272. Up to 11555 conditions per place. [2023-08-24 11:15:06,322 INFO L140 encePairwiseOnDemand]: 163/172 looper letters, 149 selfloop transitions, 26 changer transitions 4/180 dead transitions. [2023-08-24 11:15:06,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 180 transitions, 802 flow [2023-08-24 11:15:06,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 11:15:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 11:15:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 892 transitions. [2023-08-24 11:15:06,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2023-08-24 11:15:06,336 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 892 transitions. [2023-08-24 11:15:06,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 892 transitions. [2023-08-24 11:15:06,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:15:06,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 892 transitions. [2023-08-24 11:15:06,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 99.11111111111111) internal successors, (892), 9 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:06,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:06,351 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:06,352 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 95 flow. Second operand 9 states and 892 transitions. [2023-08-24 11:15:06,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 180 transitions, 802 flow [2023-08-24 11:15:06,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 180 transitions, 752 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-24 11:15:06,375 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 223 flow [2023-08-24 11:15:06,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=223, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-08-24 11:15:06,379 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-08-24 11:15:06,379 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 223 flow [2023-08-24 11:15:06,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.8) internal successors, (404), 5 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:06,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:06,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:06,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:15:06,380 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:06,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash 993862366, now seen corresponding path program 1 times [2023-08-24 11:15:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939273230] [2023-08-24 11:15:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:15:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:15:06,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:15:06,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939273230] [2023-08-24 11:15:06,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939273230] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:15:06,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:15:06,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:15:06,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512349287] [2023-08-24 11:15:06,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:15:06,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:15:06,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:15:06,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:15:06,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:15:06,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2023-08-24 11:15:06,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:06,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:15:06,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2023-08-24 11:15:06,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:15:07,262 INFO L124 PetriNetUnfolderBase]: 4668/7927 cut-off events. [2023-08-24 11:15:07,262 INFO L125 PetriNetUnfolderBase]: For 2413/2672 co-relation queries the response was YES. [2023-08-24 11:15:07,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17959 conditions, 7927 events. 4668/7927 cut-off events. For 2413/2672 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 59509 event pairs, 1461 based on Foata normal form. 893/7913 useless extension candidates. Maximal degree in co-relation 13414. Up to 3478 conditions per place. [2023-08-24 11:15:07,331 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 46 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-24 11:15:07,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 384 flow [2023-08-24 11:15:07,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:15:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:15:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-24 11:15:07,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2023-08-24 11:15:07,334 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-24 11:15:07,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-24 11:15:07,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:15:07,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-24 11:15:07,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,337 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,338 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 223 flow. Second operand 3 states and 327 transitions. [2023-08-24 11:15:07,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 384 flow [2023-08-24 11:15:07,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 11:15:07,356 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 239 flow [2023-08-24 11:15:07,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-08-24 11:15:07,359 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-08-24 11:15:07,360 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 239 flow [2023-08-24 11:15:07,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:07,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:07,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 11:15:07,365 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:07,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:07,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1474564512, now seen corresponding path program 2 times [2023-08-24 11:15:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:07,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68704928] [2023-08-24 11:15:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:15:07,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:15:07,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:15:07,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68704928] [2023-08-24 11:15:07,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68704928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:15:07,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:15:07,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:15:07,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909298381] [2023-08-24 11:15:07,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:15:07,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:15:07,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:15:07,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:15:07,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:15:07,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 172 [2023-08-24 11:15:07,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:15:07,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 172 [2023-08-24 11:15:07,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:15:07,913 INFO L124 PetriNetUnfolderBase]: 2096/4158 cut-off events. [2023-08-24 11:15:07,913 INFO L125 PetriNetUnfolderBase]: For 3420/3513 co-relation queries the response was YES. [2023-08-24 11:15:07,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10164 conditions, 4158 events. 2096/4158 cut-off events. For 3420/3513 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32302 event pairs, 491 based on Foata normal form. 473/4231 useless extension candidates. Maximal degree in co-relation 8741. Up to 1348 conditions per place. [2023-08-24 11:15:07,931 INFO L140 encePairwiseOnDemand]: 165/172 looper letters, 56 selfloop transitions, 7 changer transitions 16/110 dead transitions. [2023-08-24 11:15:07,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 110 transitions, 551 flow [2023-08-24 11:15:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:15:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:15:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-08-24 11:15:07,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2023-08-24 11:15:07,933 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-08-24 11:15:07,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-08-24 11:15:07,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:15:07,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-08-24 11:15:07,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,936 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,936 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 239 flow. Second operand 4 states and 438 transitions. [2023-08-24 11:15:07,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 110 transitions, 551 flow [2023-08-24 11:15:07,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 535 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:15:07,945 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 281 flow [2023-08-24 11:15:07,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-24 11:15:07,946 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-08-24 11:15:07,946 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 281 flow [2023-08-24 11:15:07,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:07,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:07,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:07,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:15:07,947 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:07,948 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -941351057, now seen corresponding path program 1 times [2023-08-24 11:15:07,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:07,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015666593] [2023-08-24 11:15:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:07,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:15:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:15:08,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:15:08,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015666593] [2023-08-24 11:15:08,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015666593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:15:08,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:15:08,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:15:08,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575396767] [2023-08-24 11:15:08,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:15:08,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:15:08,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:15:08,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:15:08,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:15:08,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 11:15:08,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:08,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:15:08,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 11:15:08,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:15:08,712 INFO L124 PetriNetUnfolderBase]: 4284/7435 cut-off events. [2023-08-24 11:15:08,713 INFO L125 PetriNetUnfolderBase]: For 6446/6446 co-relation queries the response was YES. [2023-08-24 11:15:08,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20646 conditions, 7435 events. 4284/7435 cut-off events. For 6446/6446 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 49272 event pairs, 685 based on Foata normal form. 0/7321 useless extension candidates. Maximal degree in co-relation 18489. Up to 2651 conditions per place. [2023-08-24 11:15:08,741 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 153 selfloop transitions, 43 changer transitions 38/234 dead transitions. [2023-08-24 11:15:08,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 1453 flow [2023-08-24 11:15:08,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 11:15:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 11:15:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 893 transitions. [2023-08-24 11:15:08,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768733850129198 [2023-08-24 11:15:08,744 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 893 transitions. [2023-08-24 11:15:08,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 893 transitions. [2023-08-24 11:15:08,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:15:08,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 893 transitions. [2023-08-24 11:15:08,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 99.22222222222223) internal successors, (893), 9 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:08,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:08,750 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:08,750 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 281 flow. Second operand 9 states and 893 transitions. [2023-08-24 11:15:08,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 1453 flow [2023-08-24 11:15:08,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 234 transitions, 1437 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-24 11:15:08,771 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 620 flow [2023-08-24 11:15:08,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-08-24 11:15:08,775 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-08-24 11:15:08,775 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 620 flow [2023-08-24 11:15:08,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.6) internal successors, (408), 5 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:08,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:08,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:08,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 11:15:08,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:08,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:08,777 INFO L85 PathProgramCache]: Analyzing trace with hash 623683176, now seen corresponding path program 1 times [2023-08-24 11:15:08,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:08,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807914611] [2023-08-24 11:15:08,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:08,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:08,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:15:08,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:15:08,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:15:08,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807914611] [2023-08-24 11:15:08,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807914611] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:15:08,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:15:08,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:15:08,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160958952] [2023-08-24 11:15:08,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:15:08,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:15:08,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:15:08,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:15:08,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:15:08,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 11:15:08,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 620 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:08,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:15:08,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 11:15:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:15:09,552 INFO L124 PetriNetUnfolderBase]: 4028/7069 cut-off events. [2023-08-24 11:15:09,553 INFO L125 PetriNetUnfolderBase]: For 10167/10167 co-relation queries the response was YES. [2023-08-24 11:15:09,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23457 conditions, 7069 events. 4028/7069 cut-off events. For 10167/10167 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 46743 event pairs, 874 based on Foata normal form. 70/7139 useless extension candidates. Maximal degree in co-relation 21645. Up to 3013 conditions per place. [2023-08-24 11:15:09,585 INFO L140 encePairwiseOnDemand]: 163/172 looper letters, 134 selfloop transitions, 46 changer transitions 22/202 dead transitions. [2023-08-24 11:15:09,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 202 transitions, 1488 flow [2023-08-24 11:15:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:15:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:15:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 700 transitions. [2023-08-24 11:15:09,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2023-08-24 11:15:09,587 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 700 transitions. [2023-08-24 11:15:09,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 700 transitions. [2023-08-24 11:15:09,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:15:09,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 700 transitions. [2023-08-24 11:15:09,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:09,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:09,591 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:09,591 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 620 flow. Second operand 7 states and 700 transitions. [2023-08-24 11:15:09,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 202 transitions, 1488 flow [2023-08-24 11:15:09,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 202 transitions, 1486 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-24 11:15:09,659 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 790 flow [2023-08-24 11:15:09,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2023-08-24 11:15:09,660 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-08-24 11:15:09,660 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 790 flow [2023-08-24 11:15:09,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:09,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:09,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:09,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 11:15:09,661 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:09,662 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:09,662 INFO L85 PathProgramCache]: Analyzing trace with hash 608950578, now seen corresponding path program 1 times [2023-08-24 11:15:09,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:09,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269945189] [2023-08-24 11:15:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:09,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:15:09,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:15:09,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:15:09,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269945189] [2023-08-24 11:15:09,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269945189] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:15:09,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:15:09,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:15:09,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151052385] [2023-08-24 11:15:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:15:09,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:15:09,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:15:09,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:15:09,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:15:09,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 11:15:09,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 790 flow. Second operand has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:09,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:15:09,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 11:15:09,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:15:10,454 INFO L124 PetriNetUnfolderBase]: 3495/6410 cut-off events. [2023-08-24 11:15:10,454 INFO L125 PetriNetUnfolderBase]: For 12073/12073 co-relation queries the response was YES. [2023-08-24 11:15:10,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22381 conditions, 6410 events. 3495/6410 cut-off events. For 12073/12073 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 44281 event pairs, 706 based on Foata normal form. 78/6488 useless extension candidates. Maximal degree in co-relation 20942. Up to 2422 conditions per place. [2023-08-24 11:15:10,481 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 140 selfloop transitions, 52 changer transitions 29/224 dead transitions. [2023-08-24 11:15:10,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 224 transitions, 1795 flow [2023-08-24 11:15:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 11:15:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 11:15:10,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 873 transitions. [2023-08-24 11:15:10,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563953488372093 [2023-08-24 11:15:10,483 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 873 transitions. [2023-08-24 11:15:10,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 873 transitions. [2023-08-24 11:15:10,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:15:10,484 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 873 transitions. [2023-08-24 11:15:10,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 97.0) internal successors, (873), 9 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:10,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:10,488 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:10,488 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 790 flow. Second operand 9 states and 873 transitions. [2023-08-24 11:15:10,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 224 transitions, 1795 flow [2023-08-24 11:15:10,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 224 transitions, 1771 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:15:10,588 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 972 flow [2023-08-24 11:15:10,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=972, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2023-08-24 11:15:10,588 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-08-24 11:15:10,589 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 972 flow [2023-08-24 11:15:10,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 82.2) internal successors, (411), 5 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:10,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:10,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:10,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 11:15:10,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:10,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:10,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1485191214, now seen corresponding path program 1 times [2023-08-24 11:15:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:10,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944907115] [2023-08-24 11:15:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:10,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:15:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:15:10,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:15:10,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944907115] [2023-08-24 11:15:10,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944907115] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:15:10,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:15:10,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 11:15:10,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721780898] [2023-08-24 11:15:10,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:15:10,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:15:10,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:15:10,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:15:10,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:15:10,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2023-08-24 11:15:10,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 972 flow. Second operand has 7 states, 7 states have (on average 87.28571428571429) internal successors, (611), 7 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:10,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:15:10,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2023-08-24 11:15:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:15:11,292 INFO L124 PetriNetUnfolderBase]: 1906/4271 cut-off events. [2023-08-24 11:15:11,292 INFO L125 PetriNetUnfolderBase]: For 13271/13510 co-relation queries the response was YES. [2023-08-24 11:15:11,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15689 conditions, 4271 events. 1906/4271 cut-off events. For 13271/13510 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 34448 event pairs, 159 based on Foata normal form. 295/4546 useless extension candidates. Maximal degree in co-relation 14822. Up to 758 conditions per place. [2023-08-24 11:15:11,315 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 85 selfloop transitions, 15 changer transitions 51/205 dead transitions. [2023-08-24 11:15:11,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 205 transitions, 1677 flow [2023-08-24 11:15:11,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 11:15:11,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 11:15:11,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 972 transitions. [2023-08-24 11:15:11,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651162790697675 [2023-08-24 11:15:11,319 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 972 transitions. [2023-08-24 11:15:11,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 972 transitions. [2023-08-24 11:15:11,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:15:11,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 972 transitions. [2023-08-24 11:15:11,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.2) internal successors, (972), 10 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:11,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:11,324 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 172.0) internal successors, (1892), 11 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:11,324 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 972 flow. Second operand 10 states and 972 transitions. [2023-08-24 11:15:11,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 205 transitions, 1677 flow [2023-08-24 11:15:11,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 205 transitions, 1634 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-24 11:15:11,413 INFO L231 Difference]: Finished difference. Result has 104 places, 107 transitions, 885 flow [2023-08-24 11:15:11,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=885, PETRI_PLACES=104, PETRI_TRANSITIONS=107} [2023-08-24 11:15:11,414 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2023-08-24 11:15:11,414 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 107 transitions, 885 flow [2023-08-24 11:15:11,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.28571428571429) internal successors, (611), 7 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:15:11,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:15:11,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:15:11,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 11:15:11,415 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-08-24 11:15:11,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:15:11,416 INFO L85 PathProgramCache]: Analyzing trace with hash -30174508, now seen corresponding path program 2 times [2023-08-24 11:15:11,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:15:11,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109317958] [2023-08-24 11:15:11,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:15:11,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:15:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:15:11,437 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 11:15:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:15:11,477 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 11:15:11,477 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 11:15:11,478 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-24 11:15:11,479 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-24 11:15:11,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-24 11:15:11,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-24 11:15:11,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-24 11:15:11,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-24 11:15:11,480 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-24 11:15:11,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 11:15:11,480 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-24 11:15:11,486 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 11:15:11,486 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 11:15:11,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 11:15:11 BasicIcfg [2023-08-24 11:15:11,548 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 11:15:11,549 INFO L158 Benchmark]: Toolchain (without parser) took 11584.32ms. Allocated memory was 396.4MB in the beginning and 880.8MB in the end (delta: 484.4MB). Free memory was 371.1MB in the beginning and 320.1MB in the end (delta: 51.0MB). Peak memory consumption was 536.0MB. Max. memory is 16.0GB. [2023-08-24 11:15:11,549 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 396.4MB. Free memory is still 373.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 11:15:11,549 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.18ms. Allocated memory is still 396.4MB. Free memory was 370.6MB in the beginning and 350.7MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-24 11:15:11,549 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.47ms. Allocated memory is still 396.4MB. Free memory was 350.7MB in the beginning and 348.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:15:11,550 INFO L158 Benchmark]: Boogie Preprocessor took 42.53ms. Allocated memory is still 396.4MB. Free memory was 348.6MB in the beginning and 346.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:15:11,550 INFO L158 Benchmark]: RCFGBuilder took 466.71ms. Allocated memory is still 396.4MB. Free memory was 346.9MB in the beginning and 330.7MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 11:15:11,550 INFO L158 Benchmark]: TraceAbstraction took 10578.80ms. Allocated memory was 396.4MB in the beginning and 880.8MB in the end (delta: 484.4MB). Free memory was 330.2MB in the beginning and 320.1MB in the end (delta: 10.0MB). Peak memory consumption was 496.2MB. Max. memory is 16.0GB. [2023-08-24 11:15:11,552 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 396.4MB. Free memory is still 373.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 428.18ms. Allocated memory is still 396.4MB. Free memory was 370.6MB in the beginning and 350.7MB in the end (delta: 19.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.47ms. Allocated memory is still 396.4MB. Free memory was 350.7MB in the beginning and 348.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 42.53ms. Allocated memory is still 396.4MB. Free memory was 348.6MB in the beginning and 346.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 466.71ms. Allocated memory is still 396.4MB. Free memory was 346.9MB in the beginning and 330.7MB in the end (delta: 16.2MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 10578.80ms. Allocated memory was 396.4MB in the beginning and 880.8MB in the end (delta: 484.4MB). Free memory was 330.2MB in the beginning and 320.1MB in the end (delta: 10.0MB). Peak memory consumption was 496.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] - GenericResultAtLocation [Line: 269]: Unsoundness Warning unspecified type, defaulting to int C: short [269] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 104 PlacesBefore, 50 PlacesAfterwards, 93 TransitionsBefore, 37 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 62 TotalNumberOfCompositions, 8742 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6068, independent: 5817, independent conditional: 0, independent unconditional: 5817, dependent: 251, dependent conditional: 0, dependent unconditional: 251, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1419, independent: 1380, independent conditional: 0, independent unconditional: 1380, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6068, independent: 4437, independent conditional: 0, independent unconditional: 4437, dependent: 212, dependent conditional: 0, dependent unconditional: 212, unknown: 1419, unknown conditional: 0, unknown unconditional: 1419] , Statistics on independence cache: Total cache size (in pairs): 275, Positive cache size: 254, Positive conditional cache size: 0, Positive unconditional cache size: 254, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l [L745] 2 return 0; [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L730] 4 y = l VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.4s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 624 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 624 mSDsluCounter, 107 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 45 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1622 IncrementalHoareTripleChecker+Invalid, 1650 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 62 mSDtfsCounter, 1622 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=972occurred in iteration=6, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 91 ConstructedInterpolants, 0 QuantifiedInterpolants, 181 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-24 11:15:11,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...