/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-1_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 15:49:01,376 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 15:49:01,419 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 15:49:01,422 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 15:49:01,422 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 15:49:01,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 15:49:01,423 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 15:49:01,441 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 15:49:01,441 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 15:49:01,442 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 15:49:01,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 15:49:01,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 15:49:01,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 15:49:01,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 15:49:01,444 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 15:49:01,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 15:49:01,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 15:49:01,445 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 15:49:01,445 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 15:49:01,445 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 15:49:01,446 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 15:49:01,446 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 15:49:01,446 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 15:49:01,447 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 15:49:01,447 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 15:49:01,447 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 15:49:01,447 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 15:49:01,448 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 15:49:01,448 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 15:49:01,448 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 15:49:01,448 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:49:01,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 15:49:01,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 15:49:01,449 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 15:49:01,449 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 15:49:01,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 15:49:01,450 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 15:49:01,450 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 15:49:01,450 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 15:49:01,450 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 15:49:01,451 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 15:49:01,453 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 15:49:01,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 15:49:01,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 15:49:01,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 15:49:01,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 15:49:01,678 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 15:49:01,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-1_bound2.i [2023-08-03 15:49:02,779 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 15:49:02,974 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 15:49:02,975 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-1_bound2.i [2023-08-03 15:49:02,987 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ba83f45/85e7dd06ff8743b2920ce8caf2af21b2/FLAGe91790db7 [2023-08-03 15:49:03,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46ba83f45/85e7dd06ff8743b2920ce8caf2af21b2 [2023-08-03 15:49:03,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 15:49:03,006 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 15:49:03,007 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 15:49:03,007 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 15:49:03,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 15:49:03,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774de0f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03, skipping insertion in model container [2023-08-03 15:49:03,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,043 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 15:49:03,330 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-1_bound2.i[31167,31180] [2023-08-03 15:49:03,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:49:03,354 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 15:49:03,380 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-03 15:49:03,382 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-03 15:49:03,395 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_26_stack_cas_longest-1_bound2.i[31167,31180] [2023-08-03 15:49:03,409 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 15:49:03,444 INFO L206 MainTranslator]: Completed translation [2023-08-03 15:49:03,446 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03 WrapperNode [2023-08-03 15:49:03,446 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 15:49:03,447 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 15:49:03,448 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 15:49:03,448 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 15:49:03,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,483 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,514 INFO L138 Inliner]: procedures = 177, calls = 47, calls flagged for inlining = 16, calls inlined = 19, statements flattened = 192 [2023-08-03 15:49:03,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 15:49:03,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 15:49:03,515 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 15:49:03,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 15:49:03,523 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,541 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,541 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,549 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,551 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,566 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 15:49:03,567 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 15:49:03,567 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 15:49:03,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 15:49:03,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (1/1) ... [2023-08-03 15:49:03,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 15:49:03,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:49:03,602 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) [2023-08-03 15:49:03,620 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 [2023-08-03 15:49:03,632 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 15:49:03,632 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-03 15:49:03,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-03 15:49:03,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 15:49:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 15:49:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 15:49:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 15:49:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 15:49:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 15:49:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 15:49:03,634 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 15:49:03,749 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 15:49:03,750 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 15:49:04,008 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 15:49:04,144 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 15:49:04,145 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 15:49:04,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:49:04 BoogieIcfgContainer [2023-08-03 15:49:04,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 15:49:04,148 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 15:49:04,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 15:49:04,151 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 15:49:04,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 03:49:03" (1/3) ... [2023-08-03 15:49:04,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fdc963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:49:04, skipping insertion in model container [2023-08-03 15:49:04,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 03:49:03" (2/3) ... [2023-08-03 15:49:04,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fdc963 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 03:49:04, skipping insertion in model container [2023-08-03 15:49:04,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 03:49:04" (3/3) ... [2023-08-03 15:49:04,153 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_26_stack_cas_longest-1_bound2.i [2023-08-03 15:49:04,160 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 15:49:04,166 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 15:49:04,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 15:49:04,167 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 15:49:04,235 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 15:49:04,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-03 15:49:04,344 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-03 15:49:04,345 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:49:04,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-03 15:49:04,350 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 118 transitions, 241 flow [2023-08-03 15:49:04,354 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 118 transitions, 241 flow [2023-08-03 15:49:04,356 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:49:04,368 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-03 15:49:04,371 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 118 transitions, 241 flow [2023-08-03 15:49:04,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 118 transitions, 241 flow [2023-08-03 15:49:04,392 INFO L124 PetriNetUnfolderBase]: 11/128 cut-off events. [2023-08-03 15:49:04,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:49:04,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 128 events. 11/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 126 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2023-08-03 15:49:04,395 INFO L119 LiptonReduction]: Number of co-enabled transitions 2496 [2023-08-03 15:49:08,390 INFO L134 LiptonReduction]: Checked pairs total: 2969 [2023-08-03 15:49:08,390 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-03 15:49:08,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:49:08,407 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=true, 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;@48fd42d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:49:08,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 15:49:08,411 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:49:08,411 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-03 15:49:08,412 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 15:49:08,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:49:08,412 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 15:49:08,413 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 15:49:08,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:49:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash 553295282, now seen corresponding path program 1 times [2023-08-03 15:49:08,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:49:08,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47218638] [2023-08-03 15:49:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:08,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:49:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:49:08,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 15:49:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:49:08,539 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 15:49:08,540 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 15:49:08,541 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 15:49:08,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 15:49:08,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 15:49:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 15:49:08,544 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 15:49:08,546 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 15:49:08,546 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 15:49:08,600 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 15:49:08,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 197 transitions, 406 flow [2023-08-03 15:49:08,680 INFO L124 PetriNetUnfolderBase]: 21/222 cut-off events. [2023-08-03 15:49:08,680 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 15:49:08,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 222 events. 21/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 404 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-08-03 15:49:08,686 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 197 transitions, 406 flow [2023-08-03 15:49:08,688 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 197 transitions, 406 flow [2023-08-03 15:49:08,688 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 15:49:08,688 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 197 transitions, 406 flow [2023-08-03 15:49:08,689 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 197 transitions, 406 flow [2023-08-03 15:49:08,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 197 transitions, 406 flow [2023-08-03 15:49:08,723 INFO L124 PetriNetUnfolderBase]: 21/222 cut-off events. [2023-08-03 15:49:08,724 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 15:49:08,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 222 events. 21/222 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 404 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 171. Up to 6 conditions per place. [2023-08-03 15:49:08,735 INFO L119 LiptonReduction]: Number of co-enabled transitions 17316 [2023-08-03 15:49:13,239 INFO L134 LiptonReduction]: Checked pairs total: 32405 [2023-08-03 15:49:13,240 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-03 15:49:13,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 15:49:13,243 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=true, 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;@48fd42d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 15:49:13,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 15:49:13,247 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 15:49:13,247 INFO L124 PetriNetUnfolderBase]: 3/31 cut-off events. [2023-08-03 15:49:13,247 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 15:49:13,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:49:13,247 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 15:49:13,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:49:13,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:49:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1958241195, now seen corresponding path program 1 times [2023-08-03 15:49:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:49:13,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753070857] [2023-08-03 15:49:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:13,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:49:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:49:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:49:13,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:49:13,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753070857] [2023-08-03 15:49:13,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753070857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 15:49:13,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144695147] [2023-08-03 15:49:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:13,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:49:13,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 15:49:13,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 15:49:13,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 15:49:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:49:13,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 15:49:13,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 15:49:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:49:13,575 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 15:49:13,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144695147] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:49:13,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 15:49:13,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 15:49:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983179277] [2023-08-03 15:49:13,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:49:13,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:49:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:49:13,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:49:13,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 15:49:13,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 356 [2023-08-03 15:49:13,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 66 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 166.6) internal successors, (833), 5 states have internal predecessors, (833), 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) [2023-08-03 15:49:13,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:49:13,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 356 [2023-08-03 15:49:13,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:49:14,055 INFO L124 PetriNetUnfolderBase]: 1850/2914 cut-off events. [2023-08-03 15:49:14,056 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-03 15:49:14,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5741 conditions, 2914 events. 1850/2914 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14359 event pairs, 0 based on Foata normal form. 0/2330 useless extension candidates. Maximal degree in co-relation 404. Up to 1976 conditions per place. [2023-08-03 15:49:14,071 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 105 selfloop transitions, 4 changer transitions 1/125 dead transitions. [2023-08-03 15:49:14,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 125 transitions, 478 flow [2023-08-03 15:49:14,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 15:49:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 15:49:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 946 transitions. [2023-08-03 15:49:14,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314606741573034 [2023-08-03 15:49:14,085 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 946 transitions. [2023-08-03 15:49:14,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 946 transitions. [2023-08-03 15:49:14,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:49:14,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 946 transitions. [2023-08-03 15:49:14,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.2) internal successors, (946), 5 states have internal predecessors, (946), 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) [2023-08-03 15:49:14,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 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) [2023-08-03 15:49:14,101 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 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) [2023-08-03 15:49:14,103 INFO L175 Difference]: Start difference. First operand has 57 places, 66 transitions, 144 flow. Second operand 5 states and 946 transitions. [2023-08-03 15:49:14,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 125 transitions, 478 flow [2023-08-03 15:49:14,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 125 transitions, 477 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:49:14,109 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 154 flow [2023-08-03 15:49:14,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=154, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2023-08-03 15:49:14,113 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 5 predicate places. [2023-08-03 15:49:14,113 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 154 flow [2023-08-03 15:49:14,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 166.6) internal successors, (833), 5 states have internal predecessors, (833), 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) [2023-08-03 15:49:14,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:49:14,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:49:14,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-03 15:49:14,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 15:49:14,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:49:14,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:49:14,325 INFO L85 PathProgramCache]: Analyzing trace with hash -226478688, now seen corresponding path program 1 times [2023-08-03 15:49:14,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:49:14,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401699520] [2023-08-03 15:49:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:14,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:49:14,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:49:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:49:14,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:49:14,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401699520] [2023-08-03 15:49:14,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401699520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:49:14,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:49:14,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 15:49:14,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693602135] [2023-08-03 15:49:14,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:49:14,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 15:49:14,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:49:14,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 15:49:14,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-03 15:49:14,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 356 [2023-08-03 15:49:14,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 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) [2023-08-03 15:49:14,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:49:14,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 356 [2023-08-03 15:49:14,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:49:14,939 INFO L124 PetriNetUnfolderBase]: 2224/3683 cut-off events. [2023-08-03 15:49:14,940 INFO L125 PetriNetUnfolderBase]: For 2189/2189 co-relation queries the response was YES. [2023-08-03 15:49:14,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8532 conditions, 3683 events. 2224/3683 cut-off events. For 2189/2189 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 19845 event pairs, 641 based on Foata normal form. 0/3059 useless extension candidates. Maximal degree in co-relation 7686. Up to 2538 conditions per place. [2023-08-03 15:49:14,961 INFO L140 encePairwiseOnDemand]: 346/356 looper letters, 102 selfloop transitions, 8 changer transitions 0/122 dead transitions. [2023-08-03 15:49:14,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 122 transitions, 544 flow [2023-08-03 15:49:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 15:49:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 15:49:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 915 transitions. [2023-08-03 15:49:14,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140449438202247 [2023-08-03 15:49:14,965 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 915 transitions. [2023-08-03 15:49:14,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 915 transitions. [2023-08-03 15:49:14,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:49:14,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 915 transitions. [2023-08-03 15:49:14,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 183.0) internal successors, (915), 5 states have internal predecessors, (915), 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) [2023-08-03 15:49:14,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 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) [2023-08-03 15:49:14,971 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 356.0) internal successors, (2136), 6 states have internal predecessors, (2136), 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) [2023-08-03 15:49:14,971 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 154 flow. Second operand 5 states and 915 transitions. [2023-08-03 15:49:14,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 122 transitions, 544 flow [2023-08-03 15:49:14,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 122 transitions, 543 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:49:14,977 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 223 flow [2023-08-03 15:49:14,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2023-08-03 15:49:14,978 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2023-08-03 15:49:14,978 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 223 flow [2023-08-03 15:49:14,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.25) internal successors, (657), 4 states have internal predecessors, (657), 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) [2023-08-03 15:49:14,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:49:14,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:49:14,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 15:49:14,979 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:49:14,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:49:14,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1964873553, now seen corresponding path program 1 times [2023-08-03 15:49:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:49:14,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811087577] [2023-08-03 15:49:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:14,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:49:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:49:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:49:15,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:49:15,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811087577] [2023-08-03 15:49:15,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811087577] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:49:15,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:49:15,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 15:49:15,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555815612] [2023-08-03 15:49:15,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:49:15,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 15:49:15,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:49:15,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 15:49:15,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 15:49:15,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 356 [2023-08-03 15:49:15,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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) [2023-08-03 15:49:15,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:49:15,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 356 [2023-08-03 15:49:15,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:49:15,574 INFO L124 PetriNetUnfolderBase]: 2772/4549 cut-off events. [2023-08-03 15:49:15,575 INFO L125 PetriNetUnfolderBase]: For 4130/4147 co-relation queries the response was YES. [2023-08-03 15:49:15,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11763 conditions, 4549 events. 2772/4549 cut-off events. For 4130/4147 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 25720 event pairs, 621 based on Foata normal form. 84/4160 useless extension candidates. Maximal degree in co-relation 7268. Up to 3543 conditions per place. [2023-08-03 15:49:15,603 INFO L140 encePairwiseOnDemand]: 351/356 looper letters, 78 selfloop transitions, 3 changer transitions 0/96 dead transitions. [2023-08-03 15:49:15,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 487 flow [2023-08-03 15:49:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 15:49:15,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 15:49:15,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2023-08-03 15:49:15,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5327715355805244 [2023-08-03 15:49:15,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2023-08-03 15:49:15,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2023-08-03 15:49:15,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:49:15,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2023-08-03 15:49:15,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 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) [2023-08-03 15:49:15,610 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 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) [2023-08-03 15:49:15,610 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 356.0) internal successors, (1424), 4 states have internal predecessors, (1424), 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) [2023-08-03 15:49:15,610 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 223 flow. Second operand 3 states and 569 transitions. [2023-08-03 15:49:15,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 487 flow [2023-08-03 15:49:15,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 487 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 15:49:15,617 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 244 flow [2023-08-03 15:49:15,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2023-08-03 15:49:15,620 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2023-08-03 15:49:15,620 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 244 flow [2023-08-03 15:49:15,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 169.33333333333334) internal successors, (508), 3 states have internal predecessors, (508), 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) [2023-08-03 15:49:15,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:49:15,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:49:15,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 15:49:15,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:49:15,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:49:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1395117884, now seen corresponding path program 1 times [2023-08-03 15:49:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:49:15,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885284163] [2023-08-03 15:49:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:15,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:49:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:49:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 15:49:15,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:49:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885284163] [2023-08-03 15:49:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885284163] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:49:15,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:49:15,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 15:49:15,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186875425] [2023-08-03 15:49:15,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:49:15,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:49:15,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:49:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:49:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 15:49:15,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-08-03 15:49:15,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 244 flow. Second operand has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 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) [2023-08-03 15:49:15,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:49:15,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-08-03 15:49:15,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:49:16,608 INFO L124 PetriNetUnfolderBase]: 4286/6866 cut-off events. [2023-08-03 15:49:16,609 INFO L125 PetriNetUnfolderBase]: For 6313/6339 co-relation queries the response was YES. [2023-08-03 15:49:16,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18271 conditions, 6866 events. 4286/6866 cut-off events. For 6313/6339 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 39807 event pairs, 1065 based on Foata normal form. 17/6126 useless extension candidates. Maximal degree in co-relation 13140. Up to 3747 conditions per place. [2023-08-03 15:49:16,658 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 159 selfloop transitions, 8 changer transitions 0/181 dead transitions. [2023-08-03 15:49:16,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 181 transitions, 949 flow [2023-08-03 15:49:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 15:49:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 15:49:16,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1101 transitions. [2023-08-03 15:49:16,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5154494382022472 [2023-08-03 15:49:16,662 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1101 transitions. [2023-08-03 15:49:16,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1101 transitions. [2023-08-03 15:49:16,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:49:16,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1101 transitions. [2023-08-03 15:49:16,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 183.5) internal successors, (1101), 6 states have internal predecessors, (1101), 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) [2023-08-03 15:49:16,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 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) [2023-08-03 15:49:16,669 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 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) [2023-08-03 15:49:16,670 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 244 flow. Second operand 6 states and 1101 transitions. [2023-08-03 15:49:16,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 181 transitions, 949 flow [2023-08-03 15:49:16,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 181 transitions, 945 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 15:49:16,677 INFO L231 Difference]: Finished difference. Result has 79 places, 77 transitions, 289 flow [2023-08-03 15:49:16,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=289, PETRI_PLACES=79, PETRI_TRANSITIONS=77} [2023-08-03 15:49:16,678 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 22 predicate places. [2023-08-03 15:49:16,678 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 77 transitions, 289 flow [2023-08-03 15:49:16,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.8) internal successors, (804), 5 states have internal predecessors, (804), 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) [2023-08-03 15:49:16,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:49:16,679 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 15:49:16,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-03 15:49:16,679 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:49:16,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:49:16,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1355292301, now seen corresponding path program 1 times [2023-08-03 15:49:16,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:49:16,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045191083] [2023-08-03 15:49:16,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:16,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:49:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 15:49:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 15:49:16,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 15:49:16,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045191083] [2023-08-03 15:49:16,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045191083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 15:49:16,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 15:49:16,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 15:49:16,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845036175] [2023-08-03 15:49:16,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 15:49:16,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 15:49:16,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 15:49:16,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 15:49:16,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-03 15:49:16,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 356 [2023-08-03 15:49:16,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 77 transitions, 289 flow. Second operand has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 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) [2023-08-03 15:49:16,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 15:49:16,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 356 [2023-08-03 15:49:16,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 15:49:17,998 INFO L124 PetriNetUnfolderBase]: 6543/10326 cut-off events. [2023-08-03 15:49:17,998 INFO L125 PetriNetUnfolderBase]: For 10135/10158 co-relation queries the response was YES. [2023-08-03 15:49:18,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28527 conditions, 10326 events. 6543/10326 cut-off events. For 10135/10158 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 61793 event pairs, 1662 based on Foata normal form. 17/9208 useless extension candidates. Maximal degree in co-relation 21127. Up to 5984 conditions per place. [2023-08-03 15:49:18,061 INFO L140 encePairwiseOnDemand]: 348/356 looper letters, 162 selfloop transitions, 9 changer transitions 0/186 dead transitions. [2023-08-03 15:49:18,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 186 transitions, 1040 flow [2023-08-03 15:49:18,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 15:49:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 15:49:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1095 transitions. [2023-08-03 15:49:18,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126404494382022 [2023-08-03 15:49:18,064 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1095 transitions. [2023-08-03 15:49:18,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1095 transitions. [2023-08-03 15:49:18,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 15:49:18,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1095 transitions. [2023-08-03 15:49:18,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 182.5) internal successors, (1095), 6 states have internal predecessors, (1095), 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) [2023-08-03 15:49:18,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 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) [2023-08-03 15:49:18,070 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 356.0) internal successors, (2492), 7 states have internal predecessors, (2492), 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) [2023-08-03 15:49:18,070 INFO L175 Difference]: Start difference. First operand has 79 places, 77 transitions, 289 flow. Second operand 6 states and 1095 transitions. [2023-08-03 15:49:18,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 186 transitions, 1040 flow [2023-08-03 15:49:18,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 186 transitions, 1030 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 15:49:18,082 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 335 flow [2023-08-03 15:49:18,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=356, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-08-03 15:49:18,082 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 28 predicate places. [2023-08-03 15:49:18,083 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 335 flow [2023-08-03 15:49:18,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 161.2) internal successors, (806), 5 states have internal predecessors, (806), 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) [2023-08-03 15:49:18,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 15:49:18,083 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, 1] [2023-08-03 15:49:18,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 15:49:18,084 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 15:49:18,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 15:49:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash -450240195, now seen corresponding path program 1 times [2023-08-03 15:49:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 15:49:18,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433468339] [2023-08-03 15:49:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 15:49:18,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 15:49:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:49:18,116 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 15:49:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 15:49:18,155 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 15:49:18,155 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 15:49:18,156 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 15:49:18,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 15:49:18,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-03 15:49:18,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 15:49:18,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 15:49:18,156 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-03 15:49:18,160 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 15:49:18,160 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 15:49:18,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 03:49:18 BasicIcfg [2023-08-03 15:49:18,222 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 15:49:18,223 INFO L158 Benchmark]: Toolchain (without parser) took 15217.32ms. Allocated memory was 539.0MB in the beginning and 778.0MB in the end (delta: 239.1MB). Free memory was 492.7MB in the beginning and 401.2MB in the end (delta: 91.5MB). Peak memory consumption was 331.3MB. Max. memory is 16.0GB. [2023-08-03 15:49:18,223 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory was 307.3MB in the beginning and 307.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 15:49:18,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 439.87ms. Allocated memory is still 539.0MB. Free memory was 492.7MB in the beginning and 472.0MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 15:49:18,224 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.59ms. Allocated memory is still 539.0MB. Free memory was 472.0MB in the beginning and 469.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 15:49:18,224 INFO L158 Benchmark]: Boogie Preprocessor took 51.22ms. Allocated memory is still 539.0MB. Free memory was 469.6MB in the beginning and 467.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 15:49:18,225 INFO L158 Benchmark]: RCFGBuilder took 579.55ms. Allocated memory is still 539.0MB. Free memory was 467.5MB in the beginning and 493.4MB in the end (delta: -25.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-03 15:49:18,225 INFO L158 Benchmark]: TraceAbstraction took 14074.10ms. Allocated memory was 539.0MB in the beginning and 778.0MB in the end (delta: 239.1MB). Free memory was 492.3MB in the beginning and 401.2MB in the end (delta: 91.1MB). Peak memory consumption was 329.2MB. Max. memory is 16.0GB. [2023-08-03 15:49:18,226 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 352.3MB. Free memory was 307.3MB in the beginning and 307.2MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 439.87ms. Allocated memory is still 539.0MB. Free memory was 492.7MB in the beginning and 472.0MB in the end (delta: 20.7MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 67.59ms. Allocated memory is still 539.0MB. Free memory was 472.0MB in the beginning and 469.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 51.22ms. Allocated memory is still 539.0MB. Free memory was 469.6MB in the beginning and 467.9MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 579.55ms. Allocated memory is still 539.0MB. Free memory was 467.5MB in the beginning and 493.4MB in the end (delta: -25.8MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * TraceAbstraction took 14074.10ms. Allocated memory was 539.0MB in the beginning and 778.0MB in the end (delta: 239.1MB). Free memory was 492.3MB in the beginning and 401.2MB in the end (delta: 91.1MB). Peak memory consumption was 329.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 254]: Unsoundness Warning unspecified type, defaulting to int C: short [254] - GenericResultAtLocation [Line: 254]: Unsoundness Warning unspecified type, defaulting to int C: short [254] - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 111 PlacesBefore, 24 PlacesAfterwards, 118 TransitionsBefore, 28 TransitionsAfterwards, 2496 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 66 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 3 ChoiceCompositions, 108 TotalNumberOfCompositions, 2969 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2118, independent: 1999, independent conditional: 0, independent unconditional: 1999, dependent: 119, dependent conditional: 0, dependent unconditional: 119, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1346, independent: 1304, independent conditional: 0, independent unconditional: 1304, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2118, independent: 695, independent conditional: 0, independent unconditional: 695, dependent: 77, dependent conditional: 0, dependent unconditional: 77, unknown: 1346, unknown conditional: 0, unknown unconditional: 1346] , Statistics on independence cache: Total cache size (in pairs): 38, Positive cache size: 25, Positive conditional cache size: 0, Positive unconditional cache size: 25, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.6s, 183 PlacesBefore, 57 PlacesAfterwards, 197 TransitionsBefore, 66 TransitionsAfterwards, 17316 CoEnabledTransitionPairs, 5 FixpointIterations, 22 TrivialSequentialCompositions, 100 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 32 ConcurrentYvCompositions, 5 ChoiceCompositions, 159 TotalNumberOfCompositions, 32405 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 17719, independent: 17298, independent conditional: 0, independent unconditional: 17298, dependent: 421, dependent conditional: 0, dependent unconditional: 421, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 9255, independent: 9165, independent conditional: 0, independent unconditional: 9165, dependent: 90, dependent conditional: 0, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 17719, independent: 8133, independent conditional: 0, independent unconditional: 8133, dependent: 331, dependent conditional: 0, dependent unconditional: 331, unknown: 9255, unknown conditional: 0, unknown unconditional: 9255] , Statistics on independence cache: Total cache size (in pairs): 611, Positive cache size: 572, Positive conditional cache size: 0, Positive unconditional cache size: 572, Negative cache size: 39, Negative conditional cache size: 0, Negative unconditional cache size: 39, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 759]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L714] 0 int memory[(2*960+1)]; [L715] 0 int next_alloc_idx = 1; [L716] 0 int m = 0; [L717] 0 int top; [L769] 0 int m2 = 0; [L770] 0 int state = 0; [L788] 0 pthread_t t; [L789] 0 int asdf=0; VAL [asdf=0, m2={5:0}, m={3:0}, next_alloc_idx=1, state=0, t={8:0}, top={4:0}] [L789] COND TRUE 0 asdf<2 [L789] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [asdf=0, m2={5:0}, m={3:0}, next_alloc_idx=1, pthread_create(&t, 0, thr1, 0)=7, state=0, t={8:0}, top={4:0}] [L773] CALL 1 __VERIFIER_atomic_acquire(&m2) [L691] EXPR 1 \read(*m) [L691] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L691] RET 1 assume_abort_if_not(*m==0) [L692] 1 *m = 1 [L773] RET 1 __VERIFIER_atomic_acquire(&m2) [L776] 1 case 0: [L777] CALL 1 EBStack_init() [L732] 1 top = 0 VAL [m2={5:0}, m={3:0}, next_alloc_idx=1, state=0, top={4:0}] [L777] RET 1 EBStack_init() [L778] 1 state = 1 VAL [arg={0:0}, arg={0:0}, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L779] 1 case 1: [L780] CALL 1 __VERIFIER_atomic_release(&m2) [L696] EXPR 1 \read(*m) [L696] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L696] RET 1 assume_abort_if_not(*m==1) [L697] 1 *m = 0 [L780] RET 1 __VERIFIER_atomic_release(&m2) [L781] CALL 1 push_loop() [L762] 1 int r = -1; [L763] 1 int arg = __VERIFIER_nondet_int(); [L764] COND TRUE 1 1 [L765] CALL, EXPR 1 push(arg) [L741] 1 int oldTop = -1, newTop = -1, casret = -1; [L742] CALL, EXPR 1 index_malloc() [L719] 1 int curr_alloc_idx = -1; VAL [curr_alloc_idx=-1, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L720] CALL 1 __VERIFIER_atomic_acquire(&m) [L691] EXPR 1 \read(*m) [L691] CALL 1 assume_abort_if_not(*m==0) [L4] COND FALSE 1 !(!cond) [L691] RET 1 assume_abort_if_not(*m==0) [L692] 1 *m = 1 [L720] RET 1 __VERIFIER_atomic_acquire(&m) [L721] COND FALSE 1 !(next_alloc_idx+2-1 > (2*960+1)) VAL [curr_alloc_idx=-1, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L725] 1 curr_alloc_idx = next_alloc_idx VAL [curr_alloc_idx=1, m2={5:0}, m={3:0}, next_alloc_idx=1, state=1, top={4:0}] [L726] 1 next_alloc_idx += 2 VAL [curr_alloc_idx=1, m2={5:0}, m={3:0}, next_alloc_idx=3, state=1, top={4:0}] [L727] CALL 1 __VERIFIER_atomic_release(&m) [L696] EXPR 1 \read(*m) [L696] CALL 1 assume_abort_if_not(*m==1) [L4] COND FALSE 1 !(!cond) [L696] RET 1 assume_abort_if_not(*m==1) [L697] 1 *m = 0 [L727] RET 1 __VERIFIER_atomic_release(&m) [L729] 1 return curr_alloc_idx; [L742] RET, EXPR 1 index_malloc() [L742] 1 newTop = index_malloc() [L743] COND FALSE 1 !(newTop == 0) [L746] 1 memory[newTop+0] = d VAL [\old(d)=9, casret={6:0}, d=9, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=-1, state=1, top={4:0}] [L747] COND TRUE 1 1 [L748] EXPR 1 \read(top) VAL [\old(d)=9, \read(top)=0, casret={6:0}, d=9, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=-1, state=1, top={4:0}] [L748] 1 oldTop = top [L749] 1 memory[newTop+1] = oldTop VAL [\old(d)=9, casret={6:0}, d=9, m2={5:0}, m={3:0}, newTop=1, next_alloc_idx=3, oldTop=0, state=1, top={4:0}] [L750] CALL 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L705] EXPR 1 \read(*v) [L705] COND TRUE 1 *v == e [L707] 1 *v = u [L707] 1 *r = 1 [L750] RET 1 __VERIFIER_atomic_CAS(&top,oldTop,newTop,&casret) [L751] EXPR 1 \read(casret) [L751] COND TRUE 1 casret==1 [L752] 1 return 1; [L741] 1 int oldTop = -1, newTop = -1, casret = -1; [L752] 1 return 1; [L765] RET, EXPR 1 push(arg) [L765] 1 r = push(arg) [L766] CALL 1 __VERIFIER_atomic_assert(r) [L759] EXPR 1 !r || !isEmpty() [L759] CALL, EXPR 1 isEmpty() [L735] EXPR 1 \read(top) [L735] COND FALSE 1 !(top == 0) [L738] 1 return 0; [L759] RET, EXPR 1 isEmpty() [L759] EXPR 1 !r || !isEmpty() [L759] COND TRUE 1 !(!(!r || !isEmpty())) [L759] 1 reach_error() VAL [\old(r)=1, m2={5:0}, m={3:0}, next_alloc_idx=3, r=1, state=1, top={4:0}] - UnprovableResult [Line: 789]: 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 3 procedures, 179 locations, 3 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: 4.3s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 249 locations, 4 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: 9.6s, OverallIterations: 6, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 530 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 436 mSDsluCounter, 170 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 115 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1218 IncrementalHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 55 mSDtfsCounter, 1218 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=335occurred in iteration=5, InterpolantAutomatonStates: 25, 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: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 226 SizeOfPredicates, 0 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 6 InterpolantComputations, 5 PerfectInterpolantSequences, 13/18 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! [2023-08-03 15:49:18,245 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...