/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 INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_28_buggy_simple_loop1_vf_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:56:11,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:56:11,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:56:11,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:56:11,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:56:11,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:56:11,855 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:56:11,887 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:56:11,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:56:11,892 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:56:11,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:56:11,892 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:56:11,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:56:11,895 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:56:11,895 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:56:11,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:56:11,895 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:56:11,895 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:56:11,896 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:56:11,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:56:11,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:56:11,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:56:11,897 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:56:11,897 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:56:11,897 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:56:11,898 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:56:11,898 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:56:11,899 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:56:11,899 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:56:11,899 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:56:11,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:56:11,900 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:56:11,901 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:56:11,901 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:56:11,901 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:56:11,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:56:11,901 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:56:11,901 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:56:11,901 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:56:11,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:56:11,902 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:56:11,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:56:12,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:56:12,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:56:12,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:56:12,162 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:56:12,162 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:56:12,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_28_buggy_simple_loop1_vf_bound2.i [2023-08-03 21:56:13,297 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:56:13,537 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:56:13,537 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/pthread-ext_28_buggy_simple_loop1_vf_bound2.i [2023-08-03 21:56:13,549 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/425749a1a/6831912edbea42289cbfe2fa1815ec96/FLAG177b36b1c [2023-08-03 21:56:13,564 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/425749a1a/6831912edbea42289cbfe2fa1815ec96 [2023-08-03 21:56:13,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:56:13,568 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:56:13,569 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:56:13,569 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:56:13,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:56:13,573 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:56:13" (1/1) ... [2023-08-03 21:56:13,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632d0610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:13, skipping insertion in model container [2023-08-03 21:56:13,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:56:13" (1/1) ... [2023-08-03 21:56:13,625 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:56:13,960 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_28_buggy_simple_loop1_vf_bound2.i[30287,30300] [2023-08-03 21:56:13,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:56:13,975 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:56:14,009 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-03 21:56:14,011 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [250] [2023-08-03 21:56:14,020 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_28_buggy_simple_loop1_vf_bound2.i[30287,30300] [2023-08-03 21:56:14,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:56:14,065 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:56:14,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14 WrapperNode [2023-08-03 21:56:14,065 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:56:14,067 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:56:14,067 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:56:14,067 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:56:14,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,101 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,121 INFO L138 Inliner]: procedures = 167, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 26 [2023-08-03 21:56:14,122 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:56:14,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:56:14,123 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:56:14,123 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:56:14,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,138 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,139 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,150 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,163 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,166 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:56:14,167 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:56:14,167 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:56:14,167 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:56:14,168 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (1/1) ... [2023-08-03 21:56:14,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:56:14,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:56:14,206 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 21:56:14,229 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 21:56:14,245 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-03 21:56:14,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-03 21:56:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:56:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:56:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:56:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:56:14,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:56:14,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:56:14,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:56:14,249 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 21:56:14,389 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:56:14,390 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:56:14,516 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:56:14,522 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:56:14,522 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-03 21:56:14,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:56:14 BoogieIcfgContainer [2023-08-03 21:56:14,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:56:14,526 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:56:14,526 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:56:14,529 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:56:14,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:56:13" (1/3) ... [2023-08-03 21:56:14,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211f5f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:56:14, skipping insertion in model container [2023-08-03 21:56:14,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:56:14" (2/3) ... [2023-08-03 21:56:14,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@211f5f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:56:14, skipping insertion in model container [2023-08-03 21:56:14,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:56:14" (3/3) ... [2023-08-03 21:56:14,531 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-ext_28_buggy_simple_loop1_vf_bound2.i [2023-08-03 21:56:14,539 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:56:14,548 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:56:14,548 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:56:14,548 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:56:14,605 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:56:14,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 71 transitions, 147 flow [2023-08-03 21:56:14,704 INFO L124 PetriNetUnfolderBase]: 10/81 cut-off events. [2023-08-03 21:56:14,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:56:14,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 81 events. 10/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-03 21:56:14,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 71 transitions, 147 flow [2023-08-03 21:56:14,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 71 transitions, 147 flow [2023-08-03 21:56:14,715 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:56:14,723 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 71 transitions, 147 flow [2023-08-03 21:56:14,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 71 transitions, 147 flow [2023-08-03 21:56:14,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 71 transitions, 147 flow [2023-08-03 21:56:14,741 INFO L124 PetriNetUnfolderBase]: 10/81 cut-off events. [2023-08-03 21:56:14,742 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:56:14,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 81 events. 10/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 105 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 58. Up to 4 conditions per place. [2023-08-03 21:56:14,744 INFO L119 LiptonReduction]: Number of co-enabled transitions 1376 [2023-08-03 21:56:16,428 INFO L134 LiptonReduction]: Checked pairs total: 1068 [2023-08-03 21:56:16,428 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-03 21:56:16,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:56:16,447 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;@70acb3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:56:16,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:56:16,458 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:56:16,458 INFO L124 PetriNetUnfolderBase]: 2/13 cut-off events. [2023-08-03 21:56:16,458 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:56:16,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:16,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:56:16,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:56:16,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash 813042396, now seen corresponding path program 1 times [2023-08-03 21:56:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954369935] [2023-08-03 21:56:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:16,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:56:16,562 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:56:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:56:16,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:56:16,611 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:56:16,612 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:56:16,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:56:16,614 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:56:16,620 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:56:16,621 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:56:16,622 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:56:16,656 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 21:56:16,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:16,698 INFO L124 PetriNetUnfolderBase]: 19/140 cut-off events. [2023-08-03 21:56:16,698 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:16,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 140 events. 19/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 296 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-08-03 21:56:16,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:16,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:16,705 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:56:16,706 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:16,706 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:16,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:16,728 INFO L124 PetriNetUnfolderBase]: 19/140 cut-off events. [2023-08-03 21:56:16,729 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:16,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 140 events. 19/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 296 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-08-03 21:56:16,739 INFO L119 LiptonReduction]: Number of co-enabled transitions 6536 [2023-08-03 21:56:19,024 INFO L134 LiptonReduction]: Checked pairs total: 4805 [2023-08-03 21:56:19,025 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-03 21:56:19,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:56:19,028 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;@70acb3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:56:19,028 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:56:19,036 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:56:19,036 INFO L124 PetriNetUnfolderBase]: 10/35 cut-off events. [2023-08-03 21:56:19,036 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:19,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:19,037 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:56:19,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:56:19,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:19,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1827119551, now seen corresponding path program 1 times [2023-08-03 21:56:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:19,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107072630] [2023-08-03 21:56:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:19,222 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 21:56:19,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:56:19,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107072630] [2023-08-03 21:56:19,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107072630] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:56:19,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855528719] [2023-08-03 21:56:19,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:19,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:56:19,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:56:19,226 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 21:56:19,227 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 21:56:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:56:19,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:56:19,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:56:19,355 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 21:56:19,355 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 21:56:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855528719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:56:19,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 21:56:19,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 21:56:19,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159282687] [2023-08-03 21:56:19,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:56:19,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:56:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:56:19,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:56:19,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:56:19,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 213 [2023-08-03 21:56:19,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 72 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 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 21:56:19,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:56:19,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 213 [2023-08-03 21:56:19,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:56:19,559 INFO L124 PetriNetUnfolderBase]: 325/474 cut-off events. [2023-08-03 21:56:19,559 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:56:19,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 958 conditions, 474 events. 325/474 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1390 event pairs, 0 based on Foata normal form. 40/307 useless extension candidates. Maximal degree in co-relation 188. Up to 304 conditions per place. [2023-08-03 21:56:19,562 INFO L140 encePairwiseOnDemand]: 207/213 looper letters, 0 selfloop transitions, 0 changer transitions 58/58 dead transitions. [2023-08-03 21:56:19,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 58 transitions, 234 flow [2023-08-03 21:56:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:56:19,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:56:19,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 546 transitions. [2023-08-03 21:56:19,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126760563380282 [2023-08-03 21:56:19,577 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 546 transitions. [2023-08-03 21:56:19,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 546 transitions. [2023-08-03 21:56:19,579 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:56:19,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 546 transitions. [2023-08-03 21:56:19,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.2) internal successors, (546), 5 states have internal predecessors, (546), 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 21:56:19,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 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 21:56:19,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 213.0) internal successors, (1278), 6 states have internal predecessors, (1278), 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 21:56:19,592 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 72 flow. Second operand 5 states and 546 transitions. [2023-08-03 21:56:19,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 58 transitions, 234 flow [2023-08-03 21:56:19,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 58 transitions, 233 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:56:19,596 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-03 21:56:19,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=213, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-03 21:56:19,600 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-03 21:56:19,600 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-03 21:56:19,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 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 21:56:19,601 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:56:19,611 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 21:56:19,809 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 21:56:19,809 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:56:19,810 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:56:19,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:19,828 INFO L124 PetriNetUnfolderBase]: 19/140 cut-off events. [2023-08-03 21:56:19,828 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:19,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 140 events. 19/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 296 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-08-03 21:56:19,830 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:19,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:19,831 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:56:19,831 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:19,832 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:19,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 115 transitions, 242 flow [2023-08-03 21:56:19,860 INFO L124 PetriNetUnfolderBase]: 19/140 cut-off events. [2023-08-03 21:56:19,861 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-03 21:56:19,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150 conditions, 140 events. 19/140 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 296 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2023-08-03 21:56:19,871 INFO L119 LiptonReduction]: Number of co-enabled transitions 6536 [2023-08-03 21:56:22,052 INFO L134 LiptonReduction]: Checked pairs total: 4805 [2023-08-03 21:56:22,053 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-03 21:56:22,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:56:22,055 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;@70acb3e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:56:22,056 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 21:56:22,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:56:22,058 INFO L124 PetriNetUnfolderBase]: 5/18 cut-off events. [2023-08-03 21:56:22,058 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:56:22,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:56:22,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 21:56:22,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:56:22,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:56:22,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1575627170, now seen corresponding path program 1 times [2023-08-03 21:56:22,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:56:22,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346219775] [2023-08-03 21:56:22,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:56:22,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:56:22,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:56:22,110 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:56:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:56:22,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:56:22,138 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:56:22,139 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-03 21:56:22,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 21:56:22,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-03 21:56:22,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:56:22,139 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:56:22,140 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-03 21:56:22,143 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:56:22,143 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:56:22,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:56:22 BasicIcfg [2023-08-03 21:56:22,181 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:56:22,182 INFO L158 Benchmark]: Toolchain (without parser) took 8613.79ms. Allocated memory is still 532.7MB. Free memory was 479.6MB in the beginning and 343.5MB in the end (delta: 136.1MB). Peak memory consumption was 136.4MB. Max. memory is 16.0GB. [2023-08-03 21:56:22,184 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 364.9MB. Free memory was 311.0MB in the beginning and 310.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:56:22,185 INFO L158 Benchmark]: CACSL2BoogieTranslator took 496.77ms. Allocated memory is still 532.7MB. Free memory was 479.6MB in the beginning and 460.1MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 21:56:22,185 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.32ms. Allocated memory is still 532.7MB. Free memory was 460.1MB in the beginning and 458.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:56:22,185 INFO L158 Benchmark]: Boogie Preprocessor took 44.18ms. Allocated memory is still 532.7MB. Free memory was 458.2MB in the beginning and 457.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:56:22,185 INFO L158 Benchmark]: RCFGBuilder took 357.13ms. Allocated memory is still 532.7MB. Free memory was 457.0MB in the beginning and 444.0MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 21:56:22,186 INFO L158 Benchmark]: TraceAbstraction took 7655.08ms. Allocated memory is still 532.7MB. Free memory was 443.4MB in the beginning and 343.5MB in the end (delta: 99.9MB). Peak memory consumption was 100.8MB. Max. memory is 16.0GB. [2023-08-03 21:56:22,187 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 364.9MB. Free memory was 311.0MB in the beginning and 310.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 496.77ms. Allocated memory is still 532.7MB. Free memory was 479.6MB in the beginning and 460.1MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 55.32ms. Allocated memory is still 532.7MB. Free memory was 460.1MB in the beginning and 458.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 44.18ms. Allocated memory is still 532.7MB. Free memory was 458.2MB in the beginning and 457.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 357.13ms. Allocated memory is still 532.7MB. Free memory was 457.0MB in the beginning and 444.0MB in the end (delta: 13.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 7655.08ms. Allocated memory is still 532.7MB. Free memory was 443.4MB in the beginning and 343.5MB in the end (delta: 99.9MB). Peak memory consumption was 100.8MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] - GenericResultAtLocation [Line: 250]: Unsoundness Warning unspecified type, defaulting to int C: short [250] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 65 PlacesBefore, 15 PlacesAfterwards, 71 TransitionsBefore, 17 TransitionsAfterwards, 1376 CoEnabledTransitionPairs, 5 FixpointIterations, 10 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 4 ChoiceCompositions, 61 TotalNumberOfCompositions, 1068 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1068, independent: 1068, independent conditional: 0, independent unconditional: 1068, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 689, independent: 689, independent conditional: 0, independent unconditional: 689, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1068, independent: 379, independent conditional: 0, independent unconditional: 379, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 689, unknown conditional: 0, unknown unconditional: 689] , Statistics on independence cache: Total cache size (in pairs): 11, Positive cache size: 11, Positive conditional cache size: 0, Positive unconditional cache size: 11, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 103 PlacesBefore, 25 PlacesAfterwards, 115 TransitionsBefore, 30 TransitionsAfterwards, 6536 CoEnabledTransitionPairs, 5 FixpointIterations, 10 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 7 ChoiceCompositions, 98 TotalNumberOfCompositions, 4805 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4805, independent: 4805, independent conditional: 0, independent unconditional: 4805, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3187, independent: 3187, independent conditional: 0, independent unconditional: 3187, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4805, independent: 1618, independent conditional: 0, independent unconditional: 1618, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 3187, unknown conditional: 0, unknown unconditional: 3187] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 103 PlacesBefore, 25 PlacesAfterwards, 115 TransitionsBefore, 30 TransitionsAfterwards, 6536 CoEnabledTransitionPairs, 5 FixpointIterations, 10 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 7 ChoiceCompositions, 98 TotalNumberOfCompositions, 4805 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4805, independent: 4805, independent conditional: 0, independent unconditional: 4805, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3189, independent: 3189, independent conditional: 0, independent unconditional: 3189, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4805, independent: 1616, independent conditional: 0, independent unconditional: 1616, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 3189, unknown conditional: 0, unknown unconditional: 3189] , Statistics on independence cache: Total cache size (in pairs): 33, Positive cache size: 33, Positive conditional cache size: 0, Positive unconditional cache size: 33, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 695]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L700] 0 pthread_t t; [L701] 0 int asdf=0; VAL [asdf=0, t={3:0}] [L701] COND TRUE 0 asdf<2 [L702] FCALL, FORK 0 pthread_create(&t, 0, thr1, 0) VAL [arg={0:0}, asdf=0, pthread_create(&t, 0, thr1, 0)=-1, t={3:0}] [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L686] 1 unsigned int x=__VERIFIER_nondet_uint(), y=__VERIFIER_nondet_uint(), z=__VERIFIER_nondet_uint(); [L687] 1 int i, j=1, k=1; [L688] 1 i=0 VAL [arg={0:0}, arg={0:0}, i=0, j=1, k=1] [L688] COND FALSE 1 !(i