/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:50:19,726 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:50:19,758 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:50:19,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:50:19,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:50:19,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:50:19,762 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:50:19,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:50:19,775 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:50:19,775 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:50:19,775 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:50:19,776 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:50:19,776 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:50:19,776 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:50:19,777 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:50:19,777 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:50:19,777 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:50:19,777 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:50:19,778 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:50:19,778 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:50:19,778 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:50:19,778 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:50:19,778 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:50:19,779 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:50:19,779 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:50:19,779 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:50:19,779 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:50:19,779 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:50:19,780 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:50:19,780 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:50:19,780 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:50:19,780 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:50:19,780 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:50:19,780 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:50:19,781 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:50:19,781 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:50:19,781 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:50:19,781 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:50:19,781 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:50:19,781 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:50:19,781 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:50:19,782 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:50:19,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:50:19,968 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:50:19,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:50:19,971 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:50:19,972 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:50:19,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i [2023-08-04 07:50:21,083 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:50:21,280 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:50:21,280 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i [2023-08-04 07:50:21,294 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2abdde12c/090183a0c6b34567849c8839b4930e5a/FLAG26b7b73c6 [2023-08-04 07:50:21,304 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2abdde12c/090183a0c6b34567849c8839b4930e5a [2023-08-04 07:50:21,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:50:21,307 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:50:21,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:50:21,308 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:50:21,310 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:50:21,310 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a0b6883 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21, skipping insertion in model container [2023-08-04 07:50:21,311 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,347 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:50:21,557 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i[31042,31055] [2023-08-04 07:50:21,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:50:21,574 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:50:21,588 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [257] [2023-08-04 07:50:21,589 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [257] [2023-08-04 07:50:21,610 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread_lazy01_bound2.i[31042,31055] [2023-08-04 07:50:21,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:50:21,651 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:50:21,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21 WrapperNode [2023-08-04 07:50:21,651 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:50:21,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:50:21,652 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:50:21,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:50:21,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,693 INFO L138 Inliner]: procedures = 169, calls = 33, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 110 [2023-08-04 07:50:21,695 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:50:21,695 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:50:21,695 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:50:21,696 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:50:21,703 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,705 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,705 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,710 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,712 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,713 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,714 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,716 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:50:21,716 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:50:21,716 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:50:21,716 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:50:21,717 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (1/1) ... [2023-08-04 07:50:21,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:50:21,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:50:21,762 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) [2023-08-04 07:50:21,784 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 [2023-08-04 07:50:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:50:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 07:50:21,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 07:50:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 07:50:21,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 07:50:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 07:50:21,797 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 07:50:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:50:21,798 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-04 07:50:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:50:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:50:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:50:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:50:21,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:50:21,799 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:50:21,800 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:50:21,920 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:50:21,921 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:50:22,124 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:50:22,129 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:50:22,129 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-04 07:50:22,130 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:50:22 BoogieIcfgContainer [2023-08-04 07:50:22,131 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:50:22,132 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:50:22,132 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:50:22,134 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:50:22,134 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:50:21" (1/3) ... [2023-08-04 07:50:22,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ae0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:50:22, skipping insertion in model container [2023-08-04 07:50:22,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:50:21" (2/3) ... [2023-08-04 07:50:22,135 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2ae0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:50:22, skipping insertion in model container [2023-08-04 07:50:22,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:50:22" (3/3) ... [2023-08-04 07:50:22,136 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread_lazy01_bound2.i [2023-08-04 07:50:22,140 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:50:22,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:50:22,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:50:22,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:50:22,203 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 07:50:22,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 312 flow [2023-08-04 07:50:22,351 INFO L124 PetriNetUnfolderBase]: 78/540 cut-off events. [2023-08-04 07:50:22,351 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 07:50:22,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 540 events. 78/540 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2816 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 07:50:22,360 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 135 transitions, 312 flow [2023-08-04 07:50:22,364 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 130 transitions, 289 flow [2023-08-04 07:50:22,366 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:50:22,374 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 130 transitions, 289 flow [2023-08-04 07:50:22,376 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 130 transitions, 289 flow [2023-08-04 07:50:22,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 130 transitions, 289 flow [2023-08-04 07:50:22,422 INFO L124 PetriNetUnfolderBase]: 66/513 cut-off events. [2023-08-04 07:50:22,422 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 07:50:22,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559 conditions, 513 events. 66/513 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2677 event pairs, 0 based on Foata normal form. 0/429 useless extension candidates. Maximal degree in co-relation 291. Up to 16 conditions per place. [2023-08-04 07:50:22,429 INFO L119 LiptonReduction]: Number of co-enabled transitions 3948 [2023-08-04 07:50:24,918 INFO L134 LiptonReduction]: Checked pairs total: 10139 [2023-08-04 07:50:24,919 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 07:50:24,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:50:24,931 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;@15d3c3c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:50:24,932 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 07:50:24,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:50:24,936 INFO L124 PetriNetUnfolderBase]: 1/34 cut-off events. [2023-08-04 07:50:24,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:50:24,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:24,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:24,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:50:24,940 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:24,940 INFO L85 PathProgramCache]: Analyzing trace with hash 17920535, now seen corresponding path program 1 times [2023-08-04 07:50:24,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:24,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466024123] [2023-08-04 07:50:24,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:24,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:50:25,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:25,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466024123] [2023-08-04 07:50:25,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466024123] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:25,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:50:25,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:50:25,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940723578] [2023-08-04 07:50:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:25,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:50:25,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:25,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:50:25,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:50:25,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 230 [2023-08-04 07:50:25,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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) [2023-08-04 07:50:25,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:25,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 230 [2023-08-04 07:50:25,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:25,676 INFO L124 PetriNetUnfolderBase]: 4449/6946 cut-off events. [2023-08-04 07:50:25,676 INFO L125 PetriNetUnfolderBase]: For 516/516 co-relation queries the response was YES. [2023-08-04 07:50:25,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13980 conditions, 6946 events. 4449/6946 cut-off events. For 516/516 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 38489 event pairs, 2725 based on Foata normal form. 315/5796 useless extension candidates. Maximal degree in co-relation 11934. Up to 6710 conditions per place. [2023-08-04 07:50:25,699 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 39 selfloop transitions, 2 changer transitions 4/49 dead transitions. [2023-08-04 07:50:25,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 217 flow [2023-08-04 07:50:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:50:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:50:25,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-04 07:50:25,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2023-08-04 07:50:25,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-04 07:50:25,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-04 07:50:25,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:25,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-04 07:50:25,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 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) [2023-08-04 07:50:25,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-04 07:50:25,725 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-04 07:50:25,726 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 119 flow. Second operand 3 states and 380 transitions. [2023-08-04 07:50:25,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 217 flow [2023-08-04 07:50:25,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:50:25,734 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 111 flow [2023-08-04 07:50:25,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2023-08-04 07:50:25,738 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-04 07:50:25,738 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 111 flow [2023-08-04 07:50:25,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 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) [2023-08-04 07:50:25,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:25,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:25,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:50:25,740 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:50:25,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:25,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1769206531, now seen corresponding path program 1 times [2023-08-04 07:50:25,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:25,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114764029] [2023-08-04 07:50:25,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:25,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:50:25,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:25,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114764029] [2023-08-04 07:50:25,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114764029] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:50:25,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220822186] [2023-08-04 07:50:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:25,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:50:25,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:50:25,836 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) [2023-08-04 07:50:25,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:50:25,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:25,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:50:25,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:50:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:50:25,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:50:25,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220822186] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:25,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:50:25,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-04 07:50:25,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301462394] [2023-08-04 07:50:25,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:25,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:50:25,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:25,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:50:25,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:50:25,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 230 [2023-08-04 07:50:25,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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) [2023-08-04 07:50:25,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:25,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 230 [2023-08-04 07:50:25,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:26,282 INFO L124 PetriNetUnfolderBase]: 2202/3642 cut-off events. [2023-08-04 07:50:26,282 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-04 07:50:26,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7380 conditions, 3642 events. 2202/3642 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 19707 event pairs, 730 based on Foata normal form. 90/3242 useless extension candidates. Maximal degree in co-relation 6025. Up to 2855 conditions per place. [2023-08-04 07:50:26,297 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 56 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-08-04 07:50:26,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 287 flow [2023-08-04 07:50:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:50:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:50:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-08-04 07:50:26,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710144927536231 [2023-08-04 07:50:26,300 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-08-04 07:50:26,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-08-04 07:50:26,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:26,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-08-04 07:50:26,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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) [2023-08-04 07:50:26,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-04 07:50:26,303 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-04 07:50:26,303 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 111 flow. Second operand 3 states and 394 transitions. [2023-08-04 07:50:26,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 287 flow [2023-08-04 07:50:26,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 281 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:50:26,306 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 126 flow [2023-08-04 07:50:26,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=41, 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=126, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-04 07:50:26,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -1 predicate places. [2023-08-04 07:50:26,307 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 126 flow [2023-08-04 07:50:26,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 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) [2023-08-04 07:50:26,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:26,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:26,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 07:50:26,513 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 [2023-08-04 07:50:26,513 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:50:26,514 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash -703660578, now seen corresponding path program 1 times [2023-08-04 07:50:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:26,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664844477] [2023-08-04 07:50:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:26,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:50:26,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:26,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664844477] [2023-08-04 07:50:26,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664844477] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:50:26,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243757387] [2023-08-04 07:50:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:26,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:50:26,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:50:26,581 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) [2023-08-04 07:50:26,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:50:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:26,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:50:26,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:50:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:50:26,663 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:50:26,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243757387] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:26,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:50:26,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:50:26,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793836307] [2023-08-04 07:50:26,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:26,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:50:26,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:26,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:50:26,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:50:26,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 230 [2023-08-04 07:50:26,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 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) [2023-08-04 07:50:26,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:26,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 230 [2023-08-04 07:50:26,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:26,923 INFO L124 PetriNetUnfolderBase]: 2061/3403 cut-off events. [2023-08-04 07:50:26,923 INFO L125 PetriNetUnfolderBase]: For 534/534 co-relation queries the response was YES. [2023-08-04 07:50:26,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7706 conditions, 3403 events. 2061/3403 cut-off events. For 534/534 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 17677 event pairs, 1152 based on Foata normal form. 0/2962 useless extension candidates. Maximal degree in co-relation 3152. Up to 3215 conditions per place. [2023-08-04 07:50:26,941 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 46 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2023-08-04 07:50:26,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 254 flow [2023-08-04 07:50:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:50:26,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:50:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 07:50:26,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492753623188406 [2023-08-04 07:50:26,945 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 07:50:26,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 07:50:26,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:26,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 07:50:26,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 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) [2023-08-04 07:50:26,948 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-04 07:50:26,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 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) [2023-08-04 07:50:26,948 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 126 flow. Second operand 3 states and 379 transitions. [2023-08-04 07:50:26,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 254 flow [2023-08-04 07:50:26,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 249 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:50:26,952 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 131 flow [2023-08-04 07:50:26,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2023-08-04 07:50:26,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 1 predicate places. [2023-08-04 07:50:26,953 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 131 flow [2023-08-04 07:50:26,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 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) [2023-08-04 07:50:26,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:26,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:26,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 07:50:27,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:50:27,160 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:50:27,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:27,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1101743012, now seen corresponding path program 1 times [2023-08-04 07:50:27,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:27,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554676208] [2023-08-04 07:50:27,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:27,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:27,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:27,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:50:27,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554676208] [2023-08-04 07:50:27,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554676208] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:50:27,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041945566] [2023-08-04 07:50:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:27,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:50:27,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:50:27,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:50:27,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:50:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:27,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:50:27,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:50:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:50:27,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:50:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:50:27,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041945566] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:50:27,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:50:27,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:50:27,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973859534] [2023-08-04 07:50:27,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:50:27,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:50:27,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:50:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:50:27,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 230 [2023-08-04 07:50:27,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 131 flow. Second operand has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:50:27,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:27,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 230 [2023-08-04 07:50:27,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:50:27,356 INFO L124 PetriNetUnfolderBase]: 8/25 cut-off events. [2023-08-04 07:50:27,356 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 07:50:27,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 25 events. 8/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 40 event pairs, 0 based on Foata normal form. 5/30 useless extension candidates. Maximal degree in co-relation 60. Up to 18 conditions per place. [2023-08-04 07:50:27,357 INFO L140 encePairwiseOnDemand]: 227/230 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 07:50:27,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 13 transitions, 62 flow [2023-08-04 07:50:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:50:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:50:27,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 454 transitions. [2023-08-04 07:50:27,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4934782608695652 [2023-08-04 07:50:27,358 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 454 transitions. [2023-08-04 07:50:27,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 454 transitions. [2023-08-04 07:50:27,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:50:27,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 454 transitions. [2023-08-04 07:50:27,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.5) internal successors, (454), 4 states have internal predecessors, (454), 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) [2023-08-04 07:50:27,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 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) [2023-08-04 07:50:27,361 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 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) [2023-08-04 07:50:27,361 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 131 flow. Second operand 4 states and 454 transitions. [2023-08-04 07:50:27,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 13 transitions, 62 flow [2023-08-04 07:50:27,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 13 transitions, 54 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 07:50:27,361 INFO L231 Difference]: Finished difference. Result has 17 places, 0 transitions, 0 flow [2023-08-04 07:50:27,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=17, PETRI_TRANSITIONS=0} [2023-08-04 07:50:27,362 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, -28 predicate places. [2023-08-04 07:50:27,362 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 0 transitions, 0 flow [2023-08-04 07:50:27,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:50:27,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-04 07:50:27,364 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-04 07:50:27,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 07:50:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:50:27,569 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:50:27,571 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-04 07:50:27,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 135 transitions, 312 flow [2023-08-04 07:50:27,620 INFO L124 PetriNetUnfolderBase]: 78/540 cut-off events. [2023-08-04 07:50:27,620 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 07:50:27,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 540 events. 78/540 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2816 event pairs, 0 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 07:50:27,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 135 transitions, 312 flow [2023-08-04 07:50:27,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 132 transitions, 297 flow [2023-08-04 07:50:27,623 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:50:27,623 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 132 transitions, 297 flow [2023-08-04 07:50:27,624 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 132 transitions, 297 flow [2023-08-04 07:50:27,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 132 transitions, 297 flow [2023-08-04 07:50:27,656 INFO L124 PetriNetUnfolderBase]: 66/516 cut-off events. [2023-08-04 07:50:27,656 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 07:50:27,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 516 events. 66/516 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2703 event pairs, 0 based on Foata normal form. 0/432 useless extension candidates. Maximal degree in co-relation 297. Up to 16 conditions per place. [2023-08-04 07:50:27,662 INFO L119 LiptonReduction]: Number of co-enabled transitions 3998 [2023-08-04 07:50:29,744 INFO L134 LiptonReduction]: Checked pairs total: 10259 [2023-08-04 07:50:29,745 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 07:50:29,747 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:50:29,747 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;@15d3c3c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:50:29,747 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:50:29,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:50:29,752 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 07:50:29,752 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:50:29,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:29,753 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:50:29,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:50:29,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:29,753 INFO L85 PathProgramCache]: Analyzing trace with hash -224418379, now seen corresponding path program 1 times [2023-08-04 07:50:29,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:29,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934003815] [2023-08-04 07:50:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:29,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:50:29,778 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:50:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:50:29,808 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:50:29,808 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:50:29,808 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:50:29,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:50:29,809 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:50:29,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:50:29,809 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:50:29,811 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:50:29,811 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:50:29,811 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:50:29,856 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 07:50:29,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 174 transitions, 438 flow [2023-08-04 07:50:30,082 INFO L124 PetriNetUnfolderBase]: 788/3526 cut-off events. [2023-08-04 07:50:30,083 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 07:50:30,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4200 conditions, 3526 events. 788/3526 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28298 event pairs, 11 based on Foata normal form. 0/3028 useless extension candidates. Maximal degree in co-relation 2129. Up to 192 conditions per place. [2023-08-04 07:50:30,097 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 174 transitions, 438 flow [2023-08-04 07:50:30,107 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 172 transitions, 426 flow [2023-08-04 07:50:30,107 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:50:30,107 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 159 places, 172 transitions, 426 flow [2023-08-04 07:50:30,107 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 159 places, 172 transitions, 426 flow [2023-08-04 07:50:30,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 172 transitions, 426 flow [2023-08-04 07:50:30,333 INFO L124 PetriNetUnfolderBase]: 788/3522 cut-off events. [2023-08-04 07:50:30,333 INFO L125 PetriNetUnfolderBase]: For 598/598 co-relation queries the response was YES. [2023-08-04 07:50:30,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4188 conditions, 3522 events. 788/3522 cut-off events. For 598/598 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 28160 event pairs, 11 based on Foata normal form. 0/3024 useless extension candidates. Maximal degree in co-relation 2123. Up to 192 conditions per place. [2023-08-04 07:50:30,372 INFO L119 LiptonReduction]: Number of co-enabled transitions 10672 [2023-08-04 07:50:32,522 INFO L134 LiptonReduction]: Checked pairs total: 34722 [2023-08-04 07:50:32,523 INFO L136 LiptonReduction]: Total number of compositions: 112 [2023-08-04 07:50:32,524 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:50:32,524 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;@15d3c3c7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:50:32,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:50:32,526 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:50:32,526 INFO L124 PetriNetUnfolderBase]: 1/32 cut-off events. [2023-08-04 07:50:32,526 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 07:50:32,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:50:32,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:50:32,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:50:32,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:50:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1731214369, now seen corresponding path program 1 times [2023-08-04 07:50:32,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:50:32,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158132] [2023-08-04 07:50:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:50:32,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:50:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:50:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:50:32,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:50:32,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158132] [2023-08-04 07:50:32,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158132] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:50:32,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:50:32,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:50:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543525566] [2023-08-04 07:50:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:50:32,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:50:32,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:50:32,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:50:32,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:50:32,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 286 [2023-08-04 07:50:32,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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) [2023-08-04 07:50:32,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:50:32,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 286 [2023-08-04 07:50:32,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:51:28,685 INFO L124 PetriNetUnfolderBase]: 753117/987319 cut-off events. [2023-08-04 07:51:28,685 INFO L125 PetriNetUnfolderBase]: For 131336/131336 co-relation queries the response was YES. [2023-08-04 07:51:30,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007136 conditions, 987319 events. 753117/987319 cut-off events. For 131336/131336 co-relation queries the response was YES. Maximal size of possible extension queue 21029. Compared 7237416 event pairs, 580008 based on Foata normal form. 0/889490 useless extension candidates. Maximal degree in co-relation 592346. Up to 948330 conditions per place. [2023-08-04 07:51:33,800 INFO L140 encePairwiseOnDemand]: 281/286 looper letters, 65 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 07:51:33,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 77 transitions, 370 flow [2023-08-04 07:51:33,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:51:33,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:51:33,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-04 07:51:33,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571095571095571 [2023-08-04 07:51:33,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-04 07:51:33,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-04 07:51:33,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:51:33,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-04 07:51:33,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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) [2023-08-04 07:51:33,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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) [2023-08-04 07:51:33,812 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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) [2023-08-04 07:51:33,812 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 232 flow. Second operand 3 states and 478 transitions. [2023-08-04 07:51:33,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 77 transitions, 370 flow [2023-08-04 07:51:34,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 77 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:51:34,555 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 230 flow [2023-08-04 07:51:34,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2023-08-04 07:51:34,556 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2023-08-04 07:51:34,556 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 230 flow [2023-08-04 07:51:34,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 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) [2023-08-04 07:51:34,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:51:34,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:51:34,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:51:34,557 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:51:34,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:51:34,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2047085729, now seen corresponding path program 1 times [2023-08-04 07:51:34,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:51:34,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436617396] [2023-08-04 07:51:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:34,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:51:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:51:34,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:51:34,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436617396] [2023-08-04 07:51:34,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436617396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:51:34,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045153205] [2023-08-04 07:51:34,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:51:34,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:51:34,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:51:34,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:51:34,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:51:34,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:51:34,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:51:34,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:51:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:51:34,675 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:51:34,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045153205] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:51:34,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:51:34,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-04 07:51:34,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315204420] [2023-08-04 07:51:34,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:51:34,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:51:34,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:51:34,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:51:34,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:51:34,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 286 [2023-08-04 07:51:34,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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) [2023-08-04 07:51:34,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:51:34,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 286 [2023-08-04 07:51:34,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:52:58,550 INFO L124 PetriNetUnfolderBase]: 1180171/1514894 cut-off events. [2023-08-04 07:52:58,550 INFO L125 PetriNetUnfolderBase]: For 160193/160193 co-relation queries the response was YES. [2023-08-04 07:53:02,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3092145 conditions, 1514894 events. 1180171/1514894 cut-off events. For 160193/160193 co-relation queries the response was YES. Maximal size of possible extension queue 26943. Compared 10673889 event pairs, 337697 based on Foata normal form. 4452/1373272 useless extension candidates. Maximal degree in co-relation 3092097. Up to 1405822 conditions per place. [2023-08-04 07:53:08,111 INFO L140 encePairwiseOnDemand]: 279/286 looper letters, 105 selfloop transitions, 5 changer transitions 0/118 dead transitions. [2023-08-04 07:53:08,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 118 transitions, 584 flow [2023-08-04 07:53:08,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:53:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:53:08,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-04 07:53:08,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5932400932400932 [2023-08-04 07:53:08,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-04 07:53:08,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-04 07:53:08,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:53:08,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-04 07:53:08,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 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) [2023-08-04 07:53:08,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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) [2023-08-04 07:53:08,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 286.0) internal successors, (1144), 4 states have internal predecessors, (1144), 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) [2023-08-04 07:53:08,119 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 230 flow. Second operand 3 states and 509 transitions. [2023-08-04 07:53:08,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 118 transitions, 584 flow [2023-08-04 07:53:08,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 118 transitions, 581 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:53:08,287 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 263 flow [2023-08-04 07:53:08,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=286, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2023-08-04 07:53:08,289 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2023-08-04 07:53:08,289 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 263 flow [2023-08-04 07:53:08,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 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) [2023-08-04 07:53:08,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:53:08,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:53:08,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 07:53:08,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:08,493 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread3Err0ASSERT_VIOLATIONERROR_FUNCTION === [thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION, thread3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:53:08,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:53:08,494 INFO L85 PathProgramCache]: Analyzing trace with hash 955944099, now seen corresponding path program 1 times [2023-08-04 07:53:08,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:53:08,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092214000] [2023-08-04 07:53:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:08,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:53:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:53:08,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:53:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092214000] [2023-08-04 07:53:08,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092214000] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:53:08,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113298129] [2023-08-04 07:53:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:53:08,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:53:08,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:53:08,581 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:53:08,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 07:53:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:53:08,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:53:08,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:53:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:53:08,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:53:08,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113298129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:53:08,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:53:08,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:53:08,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97186832] [2023-08-04 07:53:08,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:53:08,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:53:08,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:53:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:53:08,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:53:08,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 286 [2023-08-04 07:53:08,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 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) [2023-08-04 07:53:08,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:53:08,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 286 [2023-08-04 07:53:08,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand