/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/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 21:24:36,022 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 21:24:36,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 21:24:36,105 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 21:24:36,106 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 21:24:36,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 21:24:36,107 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 21:24:36,141 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 21:24:36,142 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 21:24:36,146 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 21:24:36,146 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 21:24:36,147 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 21:24:36,147 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 21:24:36,148 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 21:24:36,148 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 21:24:36,149 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 21:24:36,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 21:24:36,149 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 21:24:36,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 21:24:36,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 21:24:36,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 21:24:36,150 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 21:24:36,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 21:24:36,151 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 21:24:36,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 21:24:36,151 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 21:24:36,151 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 21:24:36,152 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 21:24:36,152 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 21:24:36,152 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 21:24:36,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:24:36,153 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 21:24:36,154 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 21:24:36,154 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 21:24:36,154 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 21:24:36,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 21:24:36,154 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 21:24:36,154 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 21:24:36,155 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 21:24:36,155 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 21:24:36,155 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 21:24:36,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 21:24:36,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 21:24:36,421 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 21:24:36,424 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 21:24:36,425 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 21:24:36,427 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 21:24:36,428 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i [2023-08-03 21:24:37,586 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 21:24:37,834 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 21:24:37,834 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/added_bound_to_unbounded/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i [2023-08-03 21:24:37,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9b677e8/27a26a668c4a4bd78b36c478dbc3426c/FLAG85e794336 [2023-08-03 21:24:37,856 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c9b677e8/27a26a668c4a4bd78b36c478dbc3426c [2023-08-03 21:24:37,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 21:24:37,860 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 21:24:37,861 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 21:24:37,861 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 21:24:37,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 21:24:37,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:24:37" (1/1) ... [2023-08-03 21:24:37,865 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642f6121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:37, skipping insertion in model container [2023-08-03 21:24:37,865 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 09:24:37" (1/1) ... [2023-08-03 21:24:37,907 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 21:24:38,172 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/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i[30176,30189] [2023-08-03 21:24:38,187 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:24:38,199 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 21:24:38,224 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:24:38,225 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-03 21:24:38,239 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/goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i[30176,30189] [2023-08-03 21:24:38,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 21:24:38,271 INFO L206 MainTranslator]: Completed translation [2023-08-03 21:24:38,272 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38 WrapperNode [2023-08-03 21:24:38,272 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 21:24:38,273 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 21:24:38,273 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 21:24:38,273 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 21:24:38,277 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,287 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,303 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-03 21:24:38,303 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 21:24:38,304 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 21:24:38,304 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 21:24:38,304 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 21:24:38,311 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,313 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,319 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,323 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,324 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,327 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 21:24:38,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 21:24:38,327 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 21:24:38,327 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 21:24:38,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (1/1) ... [2023-08-03 21:24:38,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 21:24:38,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:38,358 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 21:24:38,367 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 21:24:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 21:24:38,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 21:24:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-03 21:24:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 21:24:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 21:24:38,395 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-03 21:24:38,395 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-03 21:24:38,396 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 21:24:38,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 21:24:38,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 21:24:38,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 21:24:38,398 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 21:24:38,493 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 21:24:38,494 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 21:24:38,637 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 21:24:38,644 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 21:24:38,644 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-03 21:24:38,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:24:38 BoogieIcfgContainer [2023-08-03 21:24:38,646 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 21:24:38,648 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 21:24:38,648 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 21:24:38,650 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 21:24:38,650 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 09:24:37" (1/3) ... [2023-08-03 21:24:38,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235c1d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:24:38, skipping insertion in model container [2023-08-03 21:24:38,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 09:24:38" (2/3) ... [2023-08-03 21:24:38,651 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@235c1d20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 09:24:38, skipping insertion in model container [2023-08-03 21:24:38,651 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 09:24:38" (3/3) ... [2023-08-03 21:24:38,652 INFO L112 eAbstractionObserver]: Analyzing ICFG goblint-regression_28-race_reach_24-sound_lock_racing_bound2.i [2023-08-03 21:24:38,658 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 21:24:38,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 21:24:38,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 21:24:38,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 21:24:38,729 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-03 21:24:38,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 114 transitions, 236 flow [2023-08-03 21:24:38,815 INFO L124 PetriNetUnfolderBase]: 18/147 cut-off events. [2023-08-03 21:24:38,815 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 21:24:38,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153 conditions, 147 events. 18/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 306 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-03 21:24:38,820 INFO L82 GeneralOperation]: Start removeDead. Operand has 104 places, 114 transitions, 236 flow [2023-08-03 21:24:38,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 100 places, 109 transitions, 223 flow [2023-08-03 21:24:38,836 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:24:38,856 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-03 21:24:38,862 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 100 places, 109 transitions, 223 flow [2023-08-03 21:24:38,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 109 transitions, 223 flow [2023-08-03 21:24:38,898 INFO L124 PetriNetUnfolderBase]: 17/142 cut-off events. [2023-08-03 21:24:38,898 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:24:38,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 142 events. 17/142 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 289 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-08-03 21:24:38,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 2184 [2023-08-03 21:24:42,468 INFO L134 LiptonReduction]: Checked pairs total: 3935 [2023-08-03 21:24:42,468 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-03 21:24:42,480 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:24:42,485 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;@cc6b177, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:24:42,485 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:24:42,491 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:24:42,491 INFO L124 PetriNetUnfolderBase]: 3/26 cut-off events. [2023-08-03 21:24:42,491 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:24:42,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:42,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 21:24:42,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:24:42,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:42,496 INFO L85 PathProgramCache]: Analyzing trace with hash 120607350, now seen corresponding path program 1 times [2023-08-03 21:24:42,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:42,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623069993] [2023-08-03 21:24:42,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:42,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:24:42,608 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:24:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:24:42,649 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:24:42,650 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:24:42,651 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:24:42,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 21:24:42,653 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:24:42,655 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-03 21:24:42,656 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 21:24:42,656 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 21:24:42,675 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-03 21:24:42,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:42,717 INFO L124 PetriNetUnfolderBase]: 32/234 cut-off events. [2023-08-03 21:24:42,717 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:24:42,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-03 21:24:42,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:42,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:42,721 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:24:42,721 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:42,722 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:42,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:42,752 INFO L124 PetriNetUnfolderBase]: 32/234 cut-off events. [2023-08-03 21:24:42,752 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:24:42,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-03 21:24:42,758 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-03 21:24:46,162 INFO L134 LiptonReduction]: Checked pairs total: 16853 [2023-08-03 21:24:46,163 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-03 21:24:46,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 21:24:46,165 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;@cc6b177, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:24:46,166 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:24:46,171 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:24:46,171 INFO L124 PetriNetUnfolderBase]: 12/61 cut-off events. [2023-08-03 21:24:46,171 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-03 21:24:46,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:46,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 21:24:46,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 21:24:46,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 586384534, now seen corresponding path program 1 times [2023-08-03 21:24:46,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:46,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742523104] [2023-08-03 21:24:46,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:46,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:46,353 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 21:24:46,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742523104] [2023-08-03 21:24:46,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742523104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:46,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213835750] [2023-08-03 21:24:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:46,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:46,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:46,358 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 21:24:46,374 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 21:24:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:46,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 21:24:46,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:46,520 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 21:24:46,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:46,549 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 21:24:46,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213835750] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:46,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 21:24:46,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 5 [2023-08-03 21:24:46,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815918279] [2023-08-03 21:24:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:24:46,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:24:46,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:46,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:24:46,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 21:24:46,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 252 [2023-08-03 21:24:46,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 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 21:24:46,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:46,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 252 [2023-08-03 21:24:46,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:46,927 INFO L124 PetriNetUnfolderBase]: 1151/2088 cut-off events. [2023-08-03 21:24:46,927 INFO L125 PetriNetUnfolderBase]: For 37/37 co-relation queries the response was YES. [2023-08-03 21:24:46,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4045 conditions, 2088 events. 1151/2088 cut-off events. For 37/37 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 11990 event pairs, 818 based on Foata normal form. 426/2342 useless extension candidates. Maximal degree in co-relation 2389. Up to 1760 conditions per place. [2023-08-03 21:24:46,936 INFO L140 encePairwiseOnDemand]: 233/252 looper letters, 0 selfloop transitions, 0 changer transitions 64/64 dead transitions. [2023-08-03 21:24:46,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 64 transitions, 250 flow [2023-08-03 21:24:46,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 21:24:46,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 21:24:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-03 21:24:46,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341269841269841 [2023-08-03 21:24:46,954 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-03 21:24:46,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-03 21:24:46,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:46,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-03 21:24:46,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 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 21:24:46,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 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 21:24:46,974 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 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 21:24:46,976 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 5 states and 673 transitions. [2023-08-03 21:24:46,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 64 transitions, 250 flow [2023-08-03 21:24:46,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:24:46,986 INFO L231 Difference]: Finished difference. Result has 45 places, 0 transitions, 0 flow [2023-08-03 21:24:46,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=45, PETRI_TRANSITIONS=0} [2023-08-03 21:24:46,995 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-03 21:24:46,995 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 0 transitions, 0 flow [2023-08-03 21:24:46,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 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 21:24:46,996 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-03 21:24:47,003 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 21:24:47,201 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 21:24:47,201 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 21:24:47,202 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE (1/2) [2023-08-03 21:24:47,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:47,225 INFO L124 PetriNetUnfolderBase]: 32/234 cut-off events. [2023-08-03 21:24:47,225 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:24:47,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-03 21:24:47,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:47,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:47,228 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 21:24:47,228 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:47,228 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:47,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 144 transitions, 306 flow [2023-08-03 21:24:47,249 INFO L124 PetriNetUnfolderBase]: 32/234 cut-off events. [2023-08-03 21:24:47,249 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-03 21:24:47,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 234 events. 32/234 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 616 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-08-03 21:24:47,254 INFO L119 LiptonReduction]: Number of co-enabled transitions 6552 [2023-08-03 21:24:50,310 INFO L134 LiptonReduction]: Checked pairs total: 15192 [2023-08-03 21:24:50,310 INFO L136 LiptonReduction]: Total number of compositions: 108 [2023-08-03 21:24:50,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 21:24:50,312 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;@cc6b177, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 21:24:50,313 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-03 21:24:50,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 21:24:50,314 INFO L124 PetriNetUnfolderBase]: 1/9 cut-off events. [2023-08-03 21:24:50,314 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 21:24:50,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:50,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 21:24:50,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:50,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:50,315 INFO L85 PathProgramCache]: Analyzing trace with hash 25530931, now seen corresponding path program 1 times [2023-08-03 21:24:50,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:50,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119265653] [2023-08-03 21:24:50,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:50,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:50,459 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 21:24:50,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119265653] [2023-08-03 21:24:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119265653] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:24:50,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:24:50,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 21:24:50,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990983623] [2023-08-03 21:24:50,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:24:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 21:24:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 21:24:50,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 21:24:50,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 252 [2023-08-03 21:24:50,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 57 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 21:24:50,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:50,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 252 [2023-08-03 21:24:50,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:50,710 INFO L124 PetriNetUnfolderBase]: 1627/2904 cut-off events. [2023-08-03 21:24:50,711 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-03 21:24:50,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5635 conditions, 2904 events. 1627/2904 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 16553 event pairs, 562 based on Foata normal form. 522/3135 useless extension candidates. Maximal degree in co-relation 3943. Up to 2412 conditions per place. [2023-08-03 21:24:50,721 INFO L140 encePairwiseOnDemand]: 233/252 looper letters, 32 selfloop transitions, 3 changer transitions 15/57 dead transitions. [2023-08-03 21:24:50,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 233 flow [2023-08-03 21:24:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 21:24:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 21:24:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-03 21:24:50,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2023-08-03 21:24:50,724 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-03 21:24:50,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-03 21:24:50,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:50,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-03 21:24:50,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 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 21:24:50,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 21:24:50,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 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 21:24:50,728 INFO L175 Difference]: Start difference. First operand has 45 places, 57 transitions, 132 flow. Second operand 3 states and 422 transitions. [2023-08-03 21:24:50,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 233 flow [2023-08-03 21:24:50,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 57 transitions, 233 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 21:24:50,732 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 89 flow [2023-08-03 21:24:50,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2023-08-03 21:24:50,733 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 2 predicate places. [2023-08-03 21:24:50,733 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 89 flow [2023-08-03 21:24:50,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 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 21:24:50,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:50,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:50,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 21:24:50,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:50,735 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:50,735 INFO L85 PathProgramCache]: Analyzing trace with hash -146166908, now seen corresponding path program 1 times [2023-08-03 21:24:50,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:50,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941789304] [2023-08-03 21:24:50,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:50,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:50,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 21:24:50,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941789304] [2023-08-03 21:24:50,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941789304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 21:24:50,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 21:24:50,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 21:24:50,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390963200] [2023-08-03 21:24:50,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 21:24:50,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:24:50,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:24:50,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:24:50,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 252 [2023-08-03 21:24:50,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 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 21:24:50,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:50,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 252 [2023-08-03 21:24:50,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:51,106 INFO L124 PetriNetUnfolderBase]: 410/872 cut-off events. [2023-08-03 21:24:51,106 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 21:24:51,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 872 events. 410/872 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 4311 event pairs, 140 based on Foata normal form. 159/951 useless extension candidates. Maximal degree in co-relation 863. Up to 505 conditions per place. [2023-08-03 21:24:51,110 INFO L140 encePairwiseOnDemand]: 242/252 looper letters, 24 selfloop transitions, 10 changer transitions 0/41 dead transitions. [2023-08-03 21:24:51,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 178 flow [2023-08-03 21:24:51,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:24:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:24:51,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-03 21:24:51,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4623015873015873 [2023-08-03 21:24:51,113 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-03 21:24:51,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-03 21:24:51,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:51,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-03 21:24:51,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 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 21:24:51,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 21:24:51,120 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 21:24:51,120 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 89 flow. Second operand 4 states and 466 transitions. [2023-08-03 21:24:51,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 178 flow [2023-08-03 21:24:51,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 21:24:51,123 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 106 flow [2023-08-03 21:24:51,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-08-03 21:24:51,124 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -4 predicate places. [2023-08-03 21:24:51,125 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 106 flow [2023-08-03 21:24:51,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 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 21:24:51,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:51,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:51,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 21:24:51,127 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:51,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:51,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2046758723, now seen corresponding path program 1 times [2023-08-03 21:24:51,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:51,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501621708] [2023-08-03 21:24:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:51,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:51,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:51,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 21:24:51,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501621708] [2023-08-03 21:24:51,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501621708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 21:24:51,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536162542] [2023-08-03 21:24:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:51,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 21:24:51,209 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 21:24:51,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 21:24:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 21:24:51,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 21:24:51,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 21:24:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:51,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 21:24:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 21:24:51,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536162542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 21:24:51,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 21:24:51,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 21:24:51,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668975414] [2023-08-03 21:24:51,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 21:24:51,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 21:24:51,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 21:24:51,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 21:24:51,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 21:24:51,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 252 [2023-08-03 21:24:51,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 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 21:24:51,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 21:24:51,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 252 [2023-08-03 21:24:51,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 21:24:51,426 INFO L124 PetriNetUnfolderBase]: 328/680 cut-off events. [2023-08-03 21:24:51,426 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2023-08-03 21:24:51,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1530 conditions, 680 events. 328/680 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3266 event pairs, 97 based on Foata normal form. 0/617 useless extension candidates. Maximal degree in co-relation 797. Up to 357 conditions per place. [2023-08-03 21:24:51,429 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 43 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-03 21:24:51,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 268 flow [2023-08-03 21:24:51,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 21:24:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 21:24:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 515 transitions. [2023-08-03 21:24:51,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5109126984126984 [2023-08-03 21:24:51,431 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 515 transitions. [2023-08-03 21:24:51,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 515 transitions. [2023-08-03 21:24:51,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 21:24:51,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 515 transitions. [2023-08-03 21:24:51,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.75) internal successors, (515), 4 states have internal predecessors, (515), 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 21:24:51,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 21:24:51,436 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 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 21:24:51,436 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 106 flow. Second operand 4 states and 515 transitions. [2023-08-03 21:24:51,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 268 flow [2023-08-03 21:24:51,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 57 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 21:24:51,440 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 116 flow [2023-08-03 21:24:51,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-08-03 21:24:51,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2023-08-03 21:24:51,442 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 116 flow [2023-08-03 21:24:51,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 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 21:24:51,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 21:24:51,443 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 21:24:51,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 21:24:51,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 21:24:51,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-03 21:24:51,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 21:24:51,649 INFO L85 PathProgramCache]: Analyzing trace with hash -328868588, now seen corresponding path program 1 times [2023-08-03 21:24:51,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 21:24:51,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256245199] [2023-08-03 21:24:51,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 21:24:51,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 21:24:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:24:51,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 21:24:51,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 21:24:51,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 21:24:51,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 21:24:51,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-03 21:24:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-03 21:24:51,705 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 21:24:51,706 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (2/2) [2023-08-03 21:24:51,707 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 21:24:51,707 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 21:24:51,755 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 09:24:51 BasicIcfg [2023-08-03 21:24:51,755 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 21:24:51,755 INFO L158 Benchmark]: Toolchain (without parser) took 13895.83ms. Allocated memory was 622.9MB in the beginning and 748.7MB in the end (delta: 125.8MB). Free memory was 571.0MB in the beginning and 453.2MB in the end (delta: 117.8MB). Peak memory consumption was 243.9MB. Max. memory is 16.0GB. [2023-08-03 21:24:51,756 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 375.4MB. Free memory was 324.1MB in the beginning and 323.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 21:24:51,756 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.50ms. Allocated memory is still 622.9MB. Free memory was 570.7MB in the beginning and 550.9MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-03 21:24:51,756 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.90ms. Allocated memory is still 622.9MB. Free memory was 550.9MB in the beginning and 548.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:24:51,756 INFO L158 Benchmark]: Boogie Preprocessor took 22.55ms. Allocated memory is still 622.9MB. Free memory was 548.8MB in the beginning and 547.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 21:24:51,757 INFO L158 Benchmark]: RCFGBuilder took 318.81ms. Allocated memory is still 622.9MB. Free memory was 547.0MB in the beginning and 532.0MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-03 21:24:51,757 INFO L158 Benchmark]: TraceAbstraction took 13107.32ms. Allocated memory was 622.9MB in the beginning and 748.7MB in the end (delta: 125.8MB). Free memory was 531.5MB in the beginning and 453.2MB in the end (delta: 78.3MB). Peak memory consumption was 206.2MB. Max. memory is 16.0GB. [2023-08-03 21:24:51,759 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 375.4MB. Free memory was 324.1MB in the beginning and 323.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 411.50ms. Allocated memory is still 622.9MB. Free memory was 570.7MB in the beginning and 550.9MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.90ms. Allocated memory is still 622.9MB. Free memory was 550.9MB in the beginning and 548.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.55ms. Allocated memory is still 622.9MB. Free memory was 548.8MB in the beginning and 547.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 318.81ms. Allocated memory is still 622.9MB. Free memory was 547.0MB in the beginning and 532.0MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 13107.32ms. Allocated memory was 622.9MB in the beginning and 748.7MB in the end (delta: 125.8MB). Free memory was 531.5MB in the beginning and 453.2MB in the end (delta: 78.3MB). Peak memory consumption was 206.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] - GenericResultAtLocation [Line: 244]: Unsoundness Warning unspecified type, defaulting to int C: short [244] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 100 PlacesBefore, 26 PlacesAfterwards, 109 TransitionsBefore, 32 TransitionsAfterwards, 2184 CoEnabledTransitionPairs, 7 FixpointIterations, 40 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 96 TotalNumberOfCompositions, 3935 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2281, independent: 2148, independent conditional: 0, independent unconditional: 2148, dependent: 133, dependent conditional: 0, dependent unconditional: 133, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1149, independent: 1122, independent conditional: 0, independent unconditional: 1122, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2281, independent: 1026, independent conditional: 0, independent unconditional: 1026, dependent: 106, dependent conditional: 0, dependent unconditional: 106, unknown: 1149, unknown conditional: 0, unknown unconditional: 1149] , Statistics on independence cache: Total cache size (in pairs): 80, Positive cache size: 64, Positive conditional cache size: 0, Positive unconditional cache size: 64, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 129 PlacesBefore, 45 PlacesAfterwards, 144 TransitionsBefore, 57 TransitionsAfterwards, 6552 CoEnabledTransitionPairs, 7 FixpointIterations, 40 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 17 ConcurrentYvCompositions, 3 ChoiceCompositions, 108 TotalNumberOfCompositions, 16853 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7389, independent: 7100, independent conditional: 0, independent unconditional: 7100, dependent: 289, dependent conditional: 0, dependent unconditional: 289, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3095, independent: 3051, independent conditional: 0, independent unconditional: 3051, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7389, independent: 4049, independent conditional: 0, independent unconditional: 4049, dependent: 245, dependent conditional: 0, dependent unconditional: 245, unknown: 3095, unknown conditional: 0, unknown unconditional: 3095] , Statistics on independence cache: Total cache size (in pairs): 258, Positive cache size: 234, Positive conditional cache size: 0, Positive unconditional cache size: 234, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 129 PlacesBefore, 45 PlacesAfterwards, 144 TransitionsBefore, 57 TransitionsAfterwards, 6552 CoEnabledTransitionPairs, 6 FixpointIterations, 40 TrivialSequentialCompositions, 45 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 17 ConcurrentYvCompositions, 3 ChoiceCompositions, 108 TotalNumberOfCompositions, 15192 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7577, independent: 7328, independent conditional: 0, independent unconditional: 7328, dependent: 249, dependent conditional: 0, dependent unconditional: 249, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3178, independent: 3123, independent conditional: 0, independent unconditional: 3123, dependent: 55, dependent conditional: 0, dependent unconditional: 55, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7577, independent: 4205, independent conditional: 0, independent unconditional: 4205, dependent: 194, dependent conditional: 0, dependent unconditional: 194, unknown: 3178, unknown conditional: 0, unknown unconditional: 3178] , Statistics on independence cache: Total cache size (in pairs): 344, Positive cache size: 309, Positive conditional cache size: 0, Positive unconditional cache size: 309, Negative cache size: 35, Negative conditional cache size: 0, Negative unconditional cache size: 35, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 691]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L696] 0 pthread_mutex_t __global_lock = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L697] 0 int global = 0; [L698] 0 pthread_mutex_t mutex1 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L699] 0 pthread_mutex_t mutex2 = { { 0, 0, 0, 0, 0, { { 0, 0 } } } }; [L707] 0 int i = __VERIFIER_nondet_int(); [L708] 0 pthread_mutex_t *m = &mutex1; [L709] COND TRUE 0 \read(i) [L709] 0 m = &mutex2 [L710] 0 pthread_t t_ids[2]; [L710] 0 int i=0; VAL [__global_lock={3:0}, global=0, i=-2, i=0, m={5:0}, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L710] COND TRUE 0 i<2 [L710] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, global=0, i=-2, i=0, m={5:0}, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=-1, t_ids={6:0}] [L710] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=0, i=-2, i=1, m={5:0}, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L702] 1 (global)++ [L710] COND TRUE 0 i<2 [L710] FCALL, FORK 0 pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0)) VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=-2, i=1, m={5:0}, mutex1={4:0}, mutex2={5:0}, pthread_create(&t_ids[i], ((void *)0), t_fun, ((void *)0))=0, t_ids={6:0}] [L710] 0 i++ VAL [__global_lock={3:0}, arg={0:0}, arg={0:0}, global=1, i=-2, i=2, m={5:0}, mutex1={4:0}, mutex2={5:0}, t_ids={6:0}] [L710] COND FALSE 0 !(i<2) [L712] CALL 0 __VERIFIER_assert((global) == 0) [L691] COND TRUE 0 !(cond) [L691] 0 reach_error() VAL [\old(cond)=0, __global_lock={3:0}, arg={0:0}, arg={0:0}, cond=0, global=1, mutex1={4:0}, mutex2={5:0}] - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 125 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.9s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred 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 for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 148 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.5s, OverallIterations: 1, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 57 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 52 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 0 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 0.3s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 30 ConstructedInterpolants, 0 QuantifiedInterpolants, 92 SizeOfPredicates, 12 NumberOfNonLiveVariables, 130 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 14/24 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 1 thread instances CFG has 4 procedures, 148 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.5s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 175 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 29 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 310 IncrementalHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 29 mSolverCounterUnsat, 0 mSDtfsCounter, 310 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=0, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 131 SizeOfPredicates, 12 NumberOfNonLiveVariables, 148 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 1/4 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 21:24:51,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...