/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:18:44,229 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:18:44,282 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 11:18:44,285 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:18:44,285 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:18:44,304 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:18:44,305 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:18:44,306 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:18:44,306 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:18:44,306 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:18:44,307 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:18:44,307 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:18:44,307 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:18:44,307 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:18:44,308 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:18:44,308 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:18:44,308 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:18:44,308 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:18:44,308 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:18:44,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:18:44,309 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:18:44,309 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:18:44,309 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:18:44,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:18:44,310 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:18:44,310 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:18:44,310 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:18:44,310 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:18:44,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:18:44,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:18:44,311 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:18:44,311 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:18:44,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:18:44,311 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:18:44,311 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:18:44,311 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:18:44,567 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:18:44,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:18:44,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:18:44,584 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:18:44,585 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:18:44,586 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2023-08-24 11:18:45,505 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:18:45,692 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:18:45,692 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/18_read_write_lock.i [2023-08-24 11:18:45,700 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e17f479/61f324759aa9456dadca6e2c9db94b6c/FLAG19aff5e1e [2023-08-24 11:18:45,710 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36e17f479/61f324759aa9456dadca6e2c9db94b6c [2023-08-24 11:18:45,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:18:45,712 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:18:45,713 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:18:45,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:18:45,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:18:45,715 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:18:45" (1/1) ... [2023-08-24 11:18:45,716 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cc7270 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:45, skipping insertion in model container [2023-08-24 11:18:45,716 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:18:45" (1/1) ... [2023-08-24 11:18:45,755 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:18:45,897 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 11:18:46,002 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-ext/18_read_write_lock.i[31161,31174] [2023-08-24 11:18:46,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:18:46,013 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:18:46,030 WARN L635 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-24 11:18:46,040 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-24 11:18:46,041 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [269] [2023-08-24 11:18:46,048 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-ext/18_read_write_lock.i[31161,31174] [2023-08-24 11:18:46,049 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:18:46,069 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:18:46,069 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:18:46,069 WARN L669 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 11:18:46,074 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:18:46,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46 WrapperNode [2023-08-24 11:18:46,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:18:46,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:18:46,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:18:46,077 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:18:46,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,103 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,122 INFO L138 Inliner]: procedures = 174, calls = 32, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2023-08-24 11:18:46,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:18:46,123 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:18:46,124 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:18:46,124 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:18:46,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,133 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,145 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,147 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,147 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,148 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:18:46,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:18:46,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:18:46,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:18:46,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (1/1) ... [2023-08-24 11:18:46,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:18:46,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:18:46,173 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 11:18:46,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-24 11:18:46,199 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:18:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 11:18:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:18:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:18:46,200 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 11:18:46,299 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:18:46,301 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:18:46,434 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:18:46,481 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:18:46,481 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-24 11:18:46,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:18:46 BoogieIcfgContainer [2023-08-24 11:18:46,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:18:46,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:18:46,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:18:46,488 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:18:46,488 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:18:45" (1/3) ... [2023-08-24 11:18:46,488 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab18710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:18:46, skipping insertion in model container [2023-08-24 11:18:46,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:18:46" (2/3) ... [2023-08-24 11:18:46,489 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ab18710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:18:46, skipping insertion in model container [2023-08-24 11:18:46,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:18:46" (3/3) ... [2023-08-24 11:18:46,490 INFO L112 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2023-08-24 11:18:46,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:18:46,502 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 11:18:46,502 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:18:46,541 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:18:46,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 51 transitions, 107 flow [2023-08-24 11:18:46,599 INFO L124 PetriNetUnfolderBase]: 1/50 cut-off events. [2023-08-24 11:18:46,599 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:18:46,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54 conditions, 50 events. 1/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 32. Up to 2 conditions per place. [2023-08-24 11:18:46,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 51 transitions, 107 flow [2023-08-24 11:18:46,605 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 37 transitions, 77 flow [2023-08-24 11:18:46,607 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:18:46,617 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 41 places, 37 transitions, 77 flow [2023-08-24 11:18:46,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 41 places, 37 transitions, 77 flow [2023-08-24 11:18:46,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 77 flow [2023-08-24 11:18:46,639 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2023-08-24 11:18:46,639 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:18:46,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 11 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2023-08-24 11:18:46,640 INFO L119 LiptonReduction]: Number of co-enabled transitions 156 [2023-08-24 11:18:47,756 INFO L134 LiptonReduction]: Checked pairs total: 306 [2023-08-24 11:18:47,756 INFO L136 LiptonReduction]: Total number of compositions: 29 [2023-08-24 11:18:47,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:18:47,778 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;@70da70bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:18:47,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 11:18:47,781 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:18:47,781 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-24 11:18:47,781 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:18:47,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:18:47,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 11:18:47,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:18:47,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:18:47,786 INFO L85 PathProgramCache]: Analyzing trace with hash 216713938, now seen corresponding path program 1 times [2023-08-24 11:18:47,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:18:47,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869489060] [2023-08-24 11:18:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:18:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:18:47,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:18:47,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:18:47,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:18:47,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869489060] [2023-08-24 11:18:47,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869489060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:18:47,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:18:47,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 11:18:47,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26564138] [2023-08-24 11:18:47,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:18:47,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:18:47,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:18:47,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:18:47,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:18:47,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 80 [2023-08-24 11:18:47,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 12 places, 8 transitions, 19 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:47,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:18:47,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 80 [2023-08-24 11:18:47,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:18:47,985 INFO L124 PetriNetUnfolderBase]: 6/23 cut-off events. [2023-08-24 11:18:47,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:18:47,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 23 events. 6/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 36 event pairs, 3 based on Foata normal form. 4/27 useless extension candidates. Maximal degree in co-relation 42. Up to 12 conditions per place. [2023-08-24 11:18:47,987 INFO L140 encePairwiseOnDemand]: 76/80 looper letters, 6 selfloop transitions, 2 changer transitions 3/11 dead transitions. [2023-08-24 11:18:47,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 11 transitions, 47 flow [2023-08-24 11:18:47,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:18:47,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:18:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2023-08-24 11:18:47,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2023-08-24 11:18:47,997 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 129 transitions. [2023-08-24 11:18:47,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 129 transitions. [2023-08-24 11:18:47,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:18:48,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 129 transitions. [2023-08-24 11:18:48,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,010 INFO L175 Difference]: Start difference. First operand has 12 places, 8 transitions, 19 flow. Second operand 3 states and 129 transitions. [2023-08-24 11:18:48,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 11 transitions, 47 flow [2023-08-24 11:18:48,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:18:48,013 INFO L231 Difference]: Finished difference. Result has 15 places, 8 transitions, 30 flow [2023-08-24 11:18:48,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=30, PETRI_PLACES=15, PETRI_TRANSITIONS=8} [2023-08-24 11:18:48,016 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2023-08-24 11:18:48,016 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 8 transitions, 30 flow [2023-08-24 11:18:48,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:18:48,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:18:48,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:18:48,017 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:18:48,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:18:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2103681018, now seen corresponding path program 1 times [2023-08-24 11:18:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:18:48,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256965438] [2023-08-24 11:18:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:18:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:18:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:18:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:18:48,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:18:48,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256965438] [2023-08-24 11:18:48,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256965438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:18:48,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:18:48,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:18:48,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233649145] [2023-08-24 11:18:48,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:18:48,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 11:18:48,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:18:48,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 11:18:48,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 11:18:48,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 80 [2023-08-24 11:18:48,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 15 places, 8 transitions, 30 flow. Second operand has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:18:48,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 80 [2023-08-24 11:18:48,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:18:48,173 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-24 11:18:48,173 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 11:18:48,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 16 events. 2/16 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 1 based on Foata normal form. 2/18 useless extension candidates. Maximal degree in co-relation 34. Up to 10 conditions per place. [2023-08-24 11:18:48,173 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 5 selfloop transitions, 2 changer transitions 1/9 dead transitions. [2023-08-24 11:18:48,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 9 transitions, 48 flow [2023-08-24 11:18:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 11:18:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 11:18:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 181 transitions. [2023-08-24 11:18:48,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2023-08-24 11:18:48,176 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 181 transitions. [2023-08-24 11:18:48,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 181 transitions. [2023-08-24 11:18:48,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:18:48,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 181 transitions. [2023-08-24 11:18:48,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 45.25) internal successors, (181), 4 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,178 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 80.0) internal successors, (400), 5 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,178 INFO L175 Difference]: Start difference. First operand has 15 places, 8 transitions, 30 flow. Second operand 4 states and 181 transitions. [2023-08-24 11:18:48,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 9 transitions, 48 flow [2023-08-24 11:18:48,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 9 transitions, 44 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:18:48,179 INFO L231 Difference]: Finished difference. Result has 17 places, 8 transitions, 33 flow [2023-08-24 11:18:48,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=33, PETRI_PLACES=17, PETRI_TRANSITIONS=8} [2023-08-24 11:18:48,179 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 5 predicate places. [2023-08-24 11:18:48,180 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 8 transitions, 33 flow [2023-08-24 11:18:48,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.5) internal successors, (178), 4 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:18:48,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:18:48,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 11:18:48,180 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:18:48,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:18:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2084912688, now seen corresponding path program 2 times [2023-08-24 11:18:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:18:48,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659935201] [2023-08-24 11:18:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:18:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:18:48,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:18:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 11:18:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:18:48,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659935201] [2023-08-24 11:18:48,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659935201] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:18:48,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:18:48,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:18:48,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997236261] [2023-08-24 11:18:48,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:18:48,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:18:48,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:18:48,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:18:48,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:18:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 80 [2023-08-24 11:18:48,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 8 transitions, 33 flow. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:18:48,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 80 [2023-08-24 11:18:48,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:18:48,259 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 11:18:48,260 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-24 11:18:48,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 8 events. 0/8 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 event pairs, 0 based on Foata normal form. 1/9 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-08-24 11:18:48,260 INFO L140 encePairwiseOnDemand]: 77/80 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-24 11:18:48,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 18 places, 7 transitions, 41 flow [2023-08-24 11:18:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:18:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:18:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2023-08-24 11:18:48,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2023-08-24 11:18:48,264 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 139 transitions. [2023-08-24 11:18:48,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 139 transitions. [2023-08-24 11:18:48,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:18:48,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 139 transitions. [2023-08-24 11:18:48,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.333333333333336) internal successors, (139), 3 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,268 INFO L175 Difference]: Start difference. First operand has 17 places, 8 transitions, 33 flow. Second operand 3 states and 139 transitions. [2023-08-24 11:18:48,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 18 places, 7 transitions, 41 flow [2023-08-24 11:18:48,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 7 transitions, 36 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 11:18:48,269 INFO L231 Difference]: Finished difference. Result has 15 places, 0 transitions, 0 flow [2023-08-24 11:18:48,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=80, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=15, PETRI_TRANSITIONS=0} [2023-08-24 11:18:48,270 INFO L281 CegarLoopForPetriNet]: 12 programPoint places, 3 predicate places. [2023-08-24 11:18:48,272 INFO L495 AbstractCegarLoop]: Abstraction has has 15 places, 0 transitions, 0 flow [2023-08-24 11:18:48,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:18:48,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-24 11:18:48,274 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-24 11:18:48,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:18:48,275 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-08-24 11:18:48,278 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 11:18:48,278 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 11:18:48,281 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 11:18:48 BasicIcfg [2023-08-24 11:18:48,281 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 11:18:48,282 INFO L158 Benchmark]: Toolchain (without parser) took 2568.92ms. Allocated memory was 362.8MB in the beginning and 526.4MB in the end (delta: 163.6MB). Free memory was 337.3MB in the beginning and 398.5MB in the end (delta: -61.2MB). Peak memory consumption was 104.8MB. Max. memory is 16.0GB. [2023-08-24 11:18:48,284 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 362.8MB. Free memory was 341.0MB in the beginning and 340.9MB in the end (delta: 91.8kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 11:18:48,284 INFO L158 Benchmark]: CACSL2BoogieTranslator took 362.33ms. Allocated memory is still 362.8MB. Free memory was 337.3MB in the beginning and 317.1MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-24 11:18:48,286 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.59ms. Allocated memory is still 362.8MB. Free memory was 317.1MB in the beginning and 315.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 11:18:48,286 INFO L158 Benchmark]: Boogie Preprocessor took 25.87ms. Allocated memory is still 362.8MB. Free memory was 315.1MB in the beginning and 313.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 11:18:48,286 INFO L158 Benchmark]: RCFGBuilder took 333.32ms. Allocated memory is still 362.8MB. Free memory was 313.8MB in the beginning and 298.3MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-24 11:18:48,287 INFO L158 Benchmark]: TraceAbstraction took 1795.92ms. Allocated memory was 362.8MB in the beginning and 526.4MB in the end (delta: 163.6MB). Free memory was 297.8MB in the beginning and 398.5MB in the end (delta: -100.8MB). Peak memory consumption was 64.9MB. Max. memory is 16.0GB. [2023-08-24 11:18:48,290 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 362.8MB. Free memory was 341.0MB in the beginning and 340.9MB in the end (delta: 91.8kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 362.33ms. Allocated memory is still 362.8MB. Free memory was 337.3MB in the beginning and 317.1MB in the end (delta: 20.2MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.59ms. Allocated memory is still 362.8MB. Free memory was 317.1MB in the beginning and 315.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.87ms. Allocated memory is still 362.8MB. Free memory was 315.1MB in the beginning and 313.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 333.32ms. Allocated memory is still 362.8MB. Free memory was 313.8MB in the beginning and 298.3MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 1795.92ms. Allocated memory was 362.8MB in the beginning and 526.4MB in the end (delta: 163.6MB). Free memory was 297.8MB in the beginning and 398.5MB in the end (delta: -100.8MB). Peak memory consumption was 64.9MB. 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: 1.1s, 41 PlacesBefore, 12 PlacesAfterwards, 37 TransitionsBefore, 8 TransitionsAfterwards, 156 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 13 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 29 TotalNumberOfCompositions, 306 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 187, independent: 135, independent conditional: 0, independent unconditional: 135, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 88, independent: 76, independent conditional: 0, independent unconditional: 76, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 187, independent: 59, independent conditional: 0, independent unconditional: 59, dependent: 40, dependent conditional: 0, dependent unconditional: 40, unknown: 88, unknown conditional: 0, unknown unconditional: 88] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 738]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 59 locations, 2 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: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 11 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35 IncrementalHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1 mSolverCounterUnsat, 1 mSDtfsCounter, 35 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=2, InterpolantAutomatonStates: 10, 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, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 26 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 11:18:48,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...