/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 INSUFFICIENT_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 04:44:49,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 04:44:49,525 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 04:44:49,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 04:44:49,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 04:44:49,561 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 04:44:49,561 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 04:44:49,562 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 04:44:49,562 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 04:44:49,566 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 04:44:49,566 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 04:44:49,566 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 04:44:49,566 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 04:44:49,567 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 04:44:49,568 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 04:44:49,568 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 04:44:49,568 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 04:44:49,568 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 04:44:49,569 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 04:44:49,569 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 04:44:49,569 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 04:44:49,570 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 04:44:49,570 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 04:44:49,570 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 04:44:49,571 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 04:44:49,571 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 04:44:49,571 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 04:44:49,571 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 04:44:49,571 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 04:44:49,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 04:44:49,572 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 04:44:49,573 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 04:44:49,573 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 04:44:49,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 04:44:49,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 04:44:49,573 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 04:44:49,861 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 04:44:49,883 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 04:44:49,885 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 04:44:49,886 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 04:44:49,887 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 04:44:49,888 INFO L431 ainManager$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 04:44:51,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 04:44:51,368 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 04:44:51,369 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-24 04:44:51,379 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3dcad3ff/610c3d17c59d4c35b3290943196f74f9/FLAGbd4dcd643 [2023-08-24 04:44:51,390 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3dcad3ff/610c3d17c59d4c35b3290943196f74f9 [2023-08-24 04:44:51,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 04:44:51,394 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 04:44:51,395 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 04:44:51,395 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 04:44:51,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 04:44:51,397 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,398 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3331e57d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51, skipping insertion in model container [2023-08-24 04:44:51,398 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,435 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 04:44:51,596 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 04:44:51,717 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 04:44:51,725 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 04:44:51,741 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 04:44:51,769 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 04:44:51,775 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-24 04:44:51,776 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-24 04:44:51,803 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 04:44:51,814 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 04:44:51,847 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 04:44:51,848 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 04:44:51,848 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 04:44:51,854 INFO L206 MainTranslator]: Completed translation [2023-08-24 04:44:51,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51 WrapperNode [2023-08-24 04:44:51,854 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 04:44:51,855 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 04:44:51,856 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 04:44:51,856 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 04:44:51,861 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,890 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,917 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-24 04:44:51,917 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 04:44:51,918 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 04:44:51,918 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 04:44:51,918 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 04:44:51,926 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,926 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,942 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,942 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,946 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,947 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,949 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,949 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 04:44:51,952 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 04:44:51,952 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 04:44:51,952 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 04:44:51,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (1/1) ... [2023-08-24 04:44:51,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 04:44:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 04:44:51,988 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 04:44:51,996 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 04:44:52,017 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 04:44:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 04:44:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 04:44:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 04:44:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-08-24 04:44:52,018 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-08-24 04:44:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 04:44:52,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 04:44:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 04:44:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 04:44:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 04:44:52,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 04:44:52,019 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-08-24 04:44:52,019 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-08-24 04:44:52,020 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 04:44:52,129 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 04:44:52,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 04:44:52,268 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 04:44:52,298 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 04:44:52,299 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 04:44:52,301 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:44:52 BoogieIcfgContainer [2023-08-24 04:44:52,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 04:44:52,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 04:44:52,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 04:44:52,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 04:44:52,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:44:51" (1/3) ... [2023-08-24 04:44:52,306 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8dae90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:44:52, skipping insertion in model container [2023-08-24 04:44:52,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:44:51" (2/3) ... [2023-08-24 04:44:52,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8dae90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:44:52, skipping insertion in model container [2023-08-24 04:44:52,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:44:52" (3/3) ... [2023-08-24 04:44:52,310 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-08-24 04:44:52,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 04:44:52,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 04:44:52,325 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 04:44:52,409 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 04:44:52,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2023-08-24 04:44:52,481 INFO L124 PetriNetUnfolderBase]: 2/106 cut-off events. [2023-08-24 04:44:52,481 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 04:44:52,487 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 04:44:52,487 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 252 flow [2023-08-24 04:44:52,490 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 207 flow [2023-08-24 04:44:52,496 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 04:44:52,507 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-24 04:44:52,513 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-24 04:44:52,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 93 transitions, 207 flow [2023-08-24 04:44:52,545 INFO L124 PetriNetUnfolderBase]: 2/93 cut-off events. [2023-08-24 04:44:52,545 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 04:44:52,547 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 04:44:52,548 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2023-08-24 04:44:55,107 INFO L134 LiptonReduction]: Checked pairs total: 8742 [2023-08-24 04:44:55,107 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-24 04:44:55,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 04:44:55,124 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;@4c14ad5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 04:44:55,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-24 04:44:55,128 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 04:44:55,129 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-24 04:44:55,129 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 04:44:55,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:44:55,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:44:55,130 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 04:44:55,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:44:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash -71968847, now seen corresponding path program 1 times [2023-08-24 04:44:55,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:44:55,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830188746] [2023-08-24 04:44:55,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:44:55,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:44:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:44:55,452 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 04:44:55,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:44:55,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830188746] [2023-08-24 04:44:55,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830188746] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:44:55,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:44:55,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 04:44:55,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129078174] [2023-08-24 04:44:55,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:44:55,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:44:55,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:44:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:44:55,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:44:55,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 04:44:55,493 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 04:44:55,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:44:55,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 04:44:55,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:44:57,436 INFO L124 PetriNetUnfolderBase]: 17327/24636 cut-off events. [2023-08-24 04:44:57,436 INFO L125 PetriNetUnfolderBase]: For 2277/2277 co-relation queries the response was YES. [2023-08-24 04:44:57,493 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 04:44:57,672 INFO L140 encePairwiseOnDemand]: 163/172 looper letters, 149 selfloop transitions, 26 changer transitions 4/180 dead transitions. [2023-08-24 04:44:57,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 180 transitions, 802 flow [2023-08-24 04:44:57,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 04:44:57,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 04:44:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 892 transitions. [2023-08-24 04:44:57,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762273901808785 [2023-08-24 04:44:57,687 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 892 transitions. [2023-08-24 04:44:57,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 892 transitions. [2023-08-24 04:44:57,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:44:57,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 892 transitions. [2023-08-24 04:44:57,697 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 04:44:57,705 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 04:44:57,706 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 04:44:57,707 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 95 flow. Second operand 9 states and 892 transitions. [2023-08-24 04:44:57,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 180 transitions, 802 flow [2023-08-24 04:44:57,732 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 04:44:57,735 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 223 flow [2023-08-24 04:44:57,736 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 04:44:57,739 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-08-24 04:44:57,740 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 223 flow [2023-08-24 04:44:57,740 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 04:44:57,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:44:57,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:44:57,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 04:44:57,741 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 04:44:57,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:44:57,741 INFO L85 PathProgramCache]: Analyzing trace with hash 993862366, now seen corresponding path program 1 times [2023-08-24 04:44:57,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:44:57,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200649313] [2023-08-24 04:44:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:44:57,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:44:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:44:57,875 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 04:44:57,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:44:57,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200649313] [2023-08-24 04:44:57,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200649313] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:44:57,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:44:57,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 04:44:57,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226819913] [2023-08-24 04:44:57,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:44:57,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 04:44:57,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:44:57,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 04:44:57,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 04:44:57,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2023-08-24 04:44:57,880 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 04:44:57,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:44:57,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2023-08-24 04:44:57,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:44:58,510 INFO L124 PetriNetUnfolderBase]: 4668/7927 cut-off events. [2023-08-24 04:44:58,511 INFO L125 PetriNetUnfolderBase]: For 2413/2672 co-relation queries the response was YES. [2023-08-24 04:44:58,526 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 04:44:58,559 INFO L140 encePairwiseOnDemand]: 166/172 looper letters, 46 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-24 04:44:58,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 384 flow [2023-08-24 04:44:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 04:44:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 04:44:58,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-24 04:44:58,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2023-08-24 04:44:58,562 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-24 04:44:58,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-24 04:44:58,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:44:58,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-24 04:44:58,564 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 04:44:58,565 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 04:44:58,566 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 04:44:58,566 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 223 flow. Second operand 3 states and 327 transitions. [2023-08-24 04:44:58,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 384 flow [2023-08-24 04:44:58,578 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 04:44:58,580 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 239 flow [2023-08-24 04:44:58,581 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 04:44:58,584 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-08-24 04:44:58,584 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 239 flow [2023-08-24 04:44:58,588 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 04:44:58,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:44:58,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:44:58,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 04:44:58,588 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 04:44:58,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:44:58,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1474564512, now seen corresponding path program 2 times [2023-08-24 04:44:58,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:44:58,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146855150] [2023-08-24 04:44:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:44:58,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:44:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:44:58,713 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 04:44:58,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:44:58,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146855150] [2023-08-24 04:44:58,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146855150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:44:58,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:44:58,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 04:44:58,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336321427] [2023-08-24 04:44:58,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:44:58,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 04:44:58,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:44:58,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 04:44:58,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 04:44:58,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 172 [2023-08-24 04:44:58,717 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 04:44:58,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:44:58,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 172 [2023-08-24 04:44:58,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:44:59,093 INFO L124 PetriNetUnfolderBase]: 2096/4158 cut-off events. [2023-08-24 04:44:59,094 INFO L125 PetriNetUnfolderBase]: For 3420/3513 co-relation queries the response was YES. [2023-08-24 04:44:59,103 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 04:44:59,113 INFO L140 encePairwiseOnDemand]: 165/172 looper letters, 56 selfloop transitions, 7 changer transitions 16/110 dead transitions. [2023-08-24 04:44:59,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 110 transitions, 551 flow [2023-08-24 04:44:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 04:44:59,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 04:44:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 438 transitions. [2023-08-24 04:44:59,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366279069767442 [2023-08-24 04:44:59,115 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 438 transitions. [2023-08-24 04:44:59,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 438 transitions. [2023-08-24 04:44:59,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:44:59,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 438 transitions. [2023-08-24 04:44:59,117 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 04:44:59,118 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 04:44:59,119 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 04:44:59,119 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 239 flow. Second operand 4 states and 438 transitions. [2023-08-24 04:44:59,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 110 transitions, 551 flow [2023-08-24 04:44:59,127 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 04:44:59,129 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 281 flow [2023-08-24 04:44:59,129 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 04:44:59,130 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-08-24 04:44:59,133 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 281 flow [2023-08-24 04:44:59,133 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 04:44:59,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:44:59,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:44:59,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 04:44:59,134 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 04:44:59,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:44:59,134 INFO L85 PathProgramCache]: Analyzing trace with hash -941351057, now seen corresponding path program 1 times [2023-08-24 04:44:59,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:44:59,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254299858] [2023-08-24 04:44:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:44:59,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:44:59,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:44:59,216 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 04:44:59,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:44:59,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254299858] [2023-08-24 04:44:59,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254299858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:44:59,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:44:59,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 04:44:59,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54770348] [2023-08-24 04:44:59,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:44:59,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:44:59,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:44:59,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:44:59,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:44:59,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 04:44:59,220 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 04:44:59,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:44:59,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 04:44:59,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:44:59,920 INFO L124 PetriNetUnfolderBase]: 4284/7435 cut-off events. [2023-08-24 04:44:59,920 INFO L125 PetriNetUnfolderBase]: For 6446/6446 co-relation queries the response was YES. [2023-08-24 04:44:59,941 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 04:44:59,961 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 153 selfloop transitions, 43 changer transitions 38/234 dead transitions. [2023-08-24 04:44:59,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 234 transitions, 1453 flow [2023-08-24 04:44:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 04:44:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 04:44:59,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 893 transitions. [2023-08-24 04:44:59,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5768733850129198 [2023-08-24 04:44:59,964 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 893 transitions. [2023-08-24 04:44:59,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 893 transitions. [2023-08-24 04:44:59,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:44:59,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 893 transitions. [2023-08-24 04:44:59,967 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 04:44:59,970 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 04:44:59,970 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 04:44:59,970 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 281 flow. Second operand 9 states and 893 transitions. [2023-08-24 04:44:59,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 234 transitions, 1453 flow [2023-08-24 04:44:59,984 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 04:44:59,987 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 620 flow [2023-08-24 04:44:59,987 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 04:44:59,988 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-08-24 04:44:59,988 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 620 flow [2023-08-24 04:44:59,988 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 04:44:59,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:44:59,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:44:59,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 04:44:59,989 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 04:44:59,989 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:44:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash 623683176, now seen corresponding path program 1 times [2023-08-24 04:44:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:44:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371617497] [2023-08-24 04:44:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:44:59,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:45:00,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:45:00,037 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 04:45:00,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:45:00,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371617497] [2023-08-24 04:45:00,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371617497] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:45:00,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:45:00,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 04:45:00,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681770335] [2023-08-24 04:45:00,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:45:00,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:45:00,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:45:00,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:45:00,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:45:00,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 04:45:00,040 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 04:45:00,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:45:00,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 04:45:00,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:45:00,851 INFO L124 PetriNetUnfolderBase]: 4028/7069 cut-off events. [2023-08-24 04:45:00,851 INFO L125 PetriNetUnfolderBase]: For 10167/10167 co-relation queries the response was YES. [2023-08-24 04:45:00,872 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 04:45:00,889 INFO L140 encePairwiseOnDemand]: 163/172 looper letters, 134 selfloop transitions, 46 changer transitions 22/202 dead transitions. [2023-08-24 04:45:00,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 202 transitions, 1488 flow [2023-08-24 04:45:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 04:45:00,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 04:45:00,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 700 transitions. [2023-08-24 04:45:00,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2023-08-24 04:45:00,892 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 700 transitions. [2023-08-24 04:45:00,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 700 transitions. [2023-08-24 04:45:00,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:45:00,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 700 transitions. [2023-08-24 04:45:00,894 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 04:45:00,897 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 04:45:00,897 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 04:45:00,897 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 620 flow. Second operand 7 states and 700 transitions. [2023-08-24 04:45:00,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 202 transitions, 1488 flow [2023-08-24 04:45:00,950 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 04:45:00,953 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 790 flow [2023-08-24 04:45:00,953 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 04:45:00,954 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-08-24 04:45:00,954 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 790 flow [2023-08-24 04:45:00,954 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 04:45:00,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:45:00,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 04:45:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 04:45:00,955 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 04:45:00,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:45:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash 608950578, now seen corresponding path program 1 times [2023-08-24 04:45:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:45:00,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156674208] [2023-08-24 04:45:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:45:00,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:45:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:45:01,013 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 04:45:01,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:45:01,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156674208] [2023-08-24 04:45:01,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156674208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:45:01,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:45:01,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 04:45:01,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025115584] [2023-08-24 04:45:01,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:45:01,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 04:45:01,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:45:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 04:45:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 04:45:01,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 172 [2023-08-24 04:45:01,016 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 04:45:01,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:45:01,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 172 [2023-08-24 04:45:01,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:45:01,809 INFO L124 PetriNetUnfolderBase]: 3495/6410 cut-off events. [2023-08-24 04:45:01,810 INFO L125 PetriNetUnfolderBase]: For 12073/12073 co-relation queries the response was YES. [2023-08-24 04:45:01,829 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 04:45:01,845 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 140 selfloop transitions, 52 changer transitions 29/224 dead transitions. [2023-08-24 04:45:01,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 224 transitions, 1795 flow [2023-08-24 04:45:01,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 04:45:01,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 04:45:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 873 transitions. [2023-08-24 04:45:01,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.563953488372093 [2023-08-24 04:45:01,848 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 873 transitions. [2023-08-24 04:45:01,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 873 transitions. [2023-08-24 04:45:01,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:45:01,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 873 transitions. [2023-08-24 04:45:01,850 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 04:45:01,852 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 04:45:01,853 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 04:45:01,853 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 790 flow. Second operand 9 states and 873 transitions. [2023-08-24 04:45:01,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 224 transitions, 1795 flow [2023-08-24 04:45:01,929 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 04:45:01,931 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 972 flow [2023-08-24 04:45:01,932 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 04:45:01,932 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-08-24 04:45:01,932 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 972 flow [2023-08-24 04:45:01,933 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 04:45:01,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:45:01,933 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 04:45:01,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 04:45:01,933 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 04:45:01,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:45:01,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1485191214, now seen corresponding path program 1 times [2023-08-24 04:45:01,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:45:01,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901121962] [2023-08-24 04:45:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:45:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:45:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 04:45:02,033 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 04:45:02,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 04:45:02,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901121962] [2023-08-24 04:45:02,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901121962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 04:45:02,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 04:45:02,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 04:45:02,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267290160] [2023-08-24 04:45:02,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 04:45:02,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 04:45:02,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 04:45:02,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 04:45:02,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-24 04:45:02,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 172 [2023-08-24 04:45:02,037 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 04:45:02,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 04:45:02,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 172 [2023-08-24 04:45:02,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 04:45:02,610 INFO L124 PetriNetUnfolderBase]: 1906/4271 cut-off events. [2023-08-24 04:45:02,610 INFO L125 PetriNetUnfolderBase]: For 13271/13510 co-relation queries the response was YES. [2023-08-24 04:45:02,626 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 04:45:02,636 INFO L140 encePairwiseOnDemand]: 162/172 looper letters, 85 selfloop transitions, 15 changer transitions 51/205 dead transitions. [2023-08-24 04:45:02,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 205 transitions, 1677 flow [2023-08-24 04:45:02,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 04:45:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 04:45:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 972 transitions. [2023-08-24 04:45:02,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651162790697675 [2023-08-24 04:45:02,639 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 972 transitions. [2023-08-24 04:45:02,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 972 transitions. [2023-08-24 04:45:02,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 04:45:02,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 972 transitions. [2023-08-24 04:45:02,642 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 04:45:02,644 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 04:45:02,645 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 04:45:02,645 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 972 flow. Second operand 10 states and 972 transitions. [2023-08-24 04:45:02,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 205 transitions, 1677 flow [2023-08-24 04:45:02,704 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 04:45:02,709 INFO L231 Difference]: Finished difference. Result has 104 places, 107 transitions, 885 flow [2023-08-24 04:45:02,710 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 04:45:02,711 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 54 predicate places. [2023-08-24 04:45:02,711 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 107 transitions, 885 flow [2023-08-24 04:45:02,712 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 04:45:02,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 04:45:02,712 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 04:45:02,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 04:45:02,712 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 04:45:02,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 04:45:02,713 INFO L85 PathProgramCache]: Analyzing trace with hash -30174508, now seen corresponding path program 2 times [2023-08-24 04:45:02,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 04:45:02,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737825857] [2023-08-24 04:45:02,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 04:45:02,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 04:45:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 04:45:02,732 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 04:45:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 04:45:02,783 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 04:45:02,784 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 04:45:02,784 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-24 04:45:02,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-24 04:45:02,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-24 04:45:02,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-24 04:45:02,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-24 04:45:02,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-24 04:45:02,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-24 04:45:02,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 04:45:02,787 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-24 04:45:02,791 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 04:45:02,791 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 04:45:02,847 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 04:45:02 BasicIcfg [2023-08-24 04:45:02,848 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 04:45:02,848 INFO L158 Benchmark]: Toolchain (without parser) took 11454.51ms. Allocated memory was 352.3MB in the beginning and 1.1GB in the end (delta: 744.5MB). Free memory was 326.7MB in the beginning and 725.9MB in the end (delta: -399.2MB). Peak memory consumption was 346.4MB. Max. memory is 16.0GB. [2023-08-24 04:45:02,848 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 352.3MB. Free memory is still 330.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 04:45:02,849 INFO L158 Benchmark]: CACSL2BoogieTranslator took 460.12ms. Allocated memory is still 352.3MB. Free memory was 326.7MB in the beginning and 306.0MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 04:45:02,849 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.67ms. Allocated memory is still 352.3MB. Free memory was 306.0MB in the beginning and 303.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 04:45:02,849 INFO L158 Benchmark]: Boogie Preprocessor took 33.40ms. Allocated memory is still 352.3MB. Free memory was 303.9MB in the beginning and 303.0MB in the end (delta: 890.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 04:45:02,850 INFO L158 Benchmark]: RCFGBuilder took 348.69ms. Allocated memory is still 352.3MB. Free memory was 303.0MB in the beginning and 286.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 04:45:02,850 INFO L158 Benchmark]: TraceAbstraction took 10544.84ms. Allocated memory was 352.3MB in the beginning and 1.1GB in the end (delta: 744.5MB). Free memory was 285.0MB in the beginning and 725.9MB in the end (delta: -440.9MB). Peak memory consumption was 304.5MB. Max. memory is 16.0GB. [2023-08-24 04:45:02,852 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 352.3MB. Free memory is still 330.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 460.12ms. Allocated memory is still 352.3MB. Free memory was 326.7MB in the beginning and 306.0MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.67ms. Allocated memory is still 352.3MB. Free memory was 306.0MB in the beginning and 303.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.40ms. Allocated memory is still 352.3MB. Free memory was 303.9MB in the beginning and 303.0MB in the end (delta: 890.6kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 348.69ms. Allocated memory is still 352.3MB. Free memory was 303.0MB in the beginning and 286.2MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 10544.84ms. Allocated memory was 352.3MB in the beginning and 1.1GB in the end (delta: 744.5MB). Free memory was 285.0MB in the beginning and 725.9MB in the end (delta: -440.9MB). Peak memory consumption was 304.5MB. 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: 6.7s, 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, 0.2s 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 04:45:02,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...