/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:41:31,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:41:31,181 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 12:41:31,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:41:31,184 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:41:31,197 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:41:31,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:41:31,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:41:31,198 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:41:31,198 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:41:31,199 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:41:31,199 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:41:31,199 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:41:31,199 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:41:31,200 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:41:31,200 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:41:31,200 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:41:31,200 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:41:31,200 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:41:31,201 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:41:31,201 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:41:31,201 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:41:31,201 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:41:31,202 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:41:31,207 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:41:31,207 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:41:31,207 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:41:31,207 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:41:31,207 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:41:31,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:41:31,208 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:41:31,208 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:41:31,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:41:31,208 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:41:31,208 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:41:31,209 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:41:31,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:41:31,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:41:31,454 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:41:31,456 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:41:31,456 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:41:31,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-24 12:41:32,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:41:32,598 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:41:32,598 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i [2023-08-24 12:41:32,617 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d533178f9/5f56b55259f24d34be592f2b35f98447/FLAG35d5a6a75 [2023-08-24 12:41:32,625 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d533178f9/5f56b55259f24d34be592f2b35f98447 [2023-08-24 12:41:32,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:41:32,628 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:41:32,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:41:32,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:41:32,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:41:32,631 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:41:32" (1/1) ... [2023-08-24 12:41:32,632 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bced392 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:32, skipping insertion in model container [2023-08-24 12:41:32,632 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:41:32" (1/1) ... [2023-08-24 12:41:32,677 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:41:32,989 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2023-08-24 12:41:33,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:41:33,020 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:41:33,042 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:41:33,043 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:41:33,048 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-24 12:41:33,052 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2023-08-24 12:41:33,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:41:33,122 WARN L669 CHandler]: The function g is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 12:41:33,127 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:41:33,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33 WrapperNode [2023-08-24 12:41:33,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:41:33,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:41:33,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:41:33,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:41:33,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,158 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,180 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 150 [2023-08-24 12:41:33,180 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:41:33,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:41:33,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:41:33,181 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:41:33,187 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,187 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,202 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,205 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,209 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,216 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:41:33,217 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:41:33,217 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:41:33,217 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:41:33,218 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (1/1) ... [2023-08-24 12:41:33,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:41:33,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:41:33,243 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 12:41:33,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 12:41:33,269 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:41:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:41:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:41:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:41:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:41:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:41:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:41:33,270 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:41:33,270 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:41:33,271 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:41:33,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:41:33,273 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 12:41:33,400 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:41:33,401 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:41:33,590 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:41:33,595 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:41:33,595 INFO L302 CfgBuilder]: Removed 16 assume(true) statements. [2023-08-24 12:41:33,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:41:33 BoogieIcfgContainer [2023-08-24 12:41:33,597 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:41:33,598 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:41:33,598 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:41:33,600 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:41:33,600 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:41:32" (1/3) ... [2023-08-24 12:41:33,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea265aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:41:33, skipping insertion in model container [2023-08-24 12:41:33,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:41:33" (2/3) ... [2023-08-24 12:41:33,601 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ea265aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:41:33, skipping insertion in model container [2023-08-24 12:41:33,601 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:41:33" (3/3) ... [2023-08-24 12:41:33,602 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2023-08-24 12:41:33,618 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:41:33,618 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:41:33,618 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:41:33,668 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:41:33,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 147 transitions, 302 flow [2023-08-24 12:41:33,750 INFO L124 PetriNetUnfolderBase]: 24/186 cut-off events. [2023-08-24 12:41:33,751 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:41:33,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 24/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 508 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 106. Up to 4 conditions per place. [2023-08-24 12:41:33,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 147 transitions, 302 flow [2023-08-24 12:41:33,760 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:33,762 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:41:33,768 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:33,769 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:33,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:33,793 INFO L124 PetriNetUnfolderBase]: 23/181 cut-off events. [2023-08-24 12:41:33,793 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:41:33,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 181 events. 23/181 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 491 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 106. Up to 4 conditions per place. [2023-08-24 12:41:33,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 5580 [2023-08-24 12:41:36,364 INFO L134 LiptonReduction]: Checked pairs total: 10714 [2023-08-24 12:41:36,365 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-24 12:41:36,373 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:41:36,377 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c1c27f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:41:36,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:41:36,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:41:36,381 INFO L124 PetriNetUnfolderBase]: 2/27 cut-off events. [2023-08-24 12:41:36,381 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:41:36,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:36,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:41:36,382 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:41:36,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash 63946656, now seen corresponding path program 1 times [2023-08-24 12:41:36,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:36,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753955546] [2023-08-24 12:41:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:36,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:36,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:36,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:41:36,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753955546] [2023-08-24 12:41:36,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753955546] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:41:36,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:41:36,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:41:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640827067] [2023-08-24 12:41:36,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:41:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:41:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:41:36,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:41:36,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:41:36,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 257 [2023-08-24 12:41:36,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 51 transitions, 107 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:36,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:41:36,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 257 [2023-08-24 12:41:36,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:41:36,683 INFO L124 PetriNetUnfolderBase]: 171/415 cut-off events. [2023-08-24 12:41:36,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:41:36,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 415 events. 171/415 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2157 event pairs, 0 based on Foata normal form. 22/392 useless extension candidates. Maximal degree in co-relation 752. Up to 341 conditions per place. [2023-08-24 12:41:36,693 INFO L140 encePairwiseOnDemand]: 239/257 looper letters, 40 selfloop transitions, 2 changer transitions 6/54 dead transitions. [2023-08-24 12:41:36,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 54 transitions, 207 flow [2023-08-24 12:41:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:41:36,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:41:36,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 432 transitions. [2023-08-24 12:41:36,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603112840466926 [2023-08-24 12:41:36,708 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 432 transitions. [2023-08-24 12:41:36,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 432 transitions. [2023-08-24 12:41:36,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:41:36,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 432 transitions. [2023-08-24 12:41:36,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:36,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:36,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:36,720 INFO L175 Difference]: Start difference. First operand has 39 places, 51 transitions, 107 flow. Second operand 3 states and 432 transitions. [2023-08-24 12:41:36,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 54 transitions, 207 flow [2023-08-24 12:41:36,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 207 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:41:36,725 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 73 flow [2023-08-24 12:41:36,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2023-08-24 12:41:36,732 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 2 predicate places. [2023-08-24 12:41:36,732 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 73 flow [2023-08-24 12:41:36,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:36,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:36,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:41:36,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:41:36,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:41:36,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:36,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1979658114, now seen corresponding path program 1 times [2023-08-24 12:41:36,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:36,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953670366] [2023-08-24 12:41:36,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:36,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:36,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:41:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953670366] [2023-08-24 12:41:36,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953670366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:41:36,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279236106] [2023-08-24 12:41:36,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:36,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:41:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:41:36,845 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) [2023-08-24 12:41:36,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 12:41:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:36,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:41:36,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:41:36,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:36,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:41:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:36,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279236106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:41:36,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:41:36,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:41:36,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200548054] [2023-08-24 12:41:36,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:41:36,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:41:36,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:41:36,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:41:36,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:41:36,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 257 [2023-08-24 12:41:36,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 73 flow. Second operand has 7 states, 7 states have (on average 121.42857142857143) internal successors, (850), 7 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:36,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:41:36,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 257 [2023-08-24 12:41:36,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:41:37,047 INFO L124 PetriNetUnfolderBase]: 35/92 cut-off events. [2023-08-24 12:41:37,048 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-24 12:41:37,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 92 events. 35/92 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 305 event pairs, 0 based on Foata normal form. 17/106 useless extension candidates. Maximal degree in co-relation 208. Up to 68 conditions per place. [2023-08-24 12:41:37,050 INFO L140 encePairwiseOnDemand]: 254/257 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-24 12:41:37,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 43 transitions, 173 flow [2023-08-24 12:41:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:41:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:41:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 516 transitions. [2023-08-24 12:41:37,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019455252918288 [2023-08-24 12:41:37,052 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 516 transitions. [2023-08-24 12:41:37,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 516 transitions. [2023-08-24 12:41:37,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:41:37,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 516 transitions. [2023-08-24 12:41:37,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.0) internal successors, (516), 4 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:37,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:37,058 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:37,061 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 73 flow. Second operand 4 states and 516 transitions. [2023-08-24 12:41:37,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 43 transitions, 173 flow [2023-08-24 12:41:37,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 43 transitions, 167 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 12:41:37,062 INFO L231 Difference]: Finished difference. Result has 30 places, 0 transitions, 0 flow [2023-08-24 12:41:37,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=30, PETRI_TRANSITIONS=0} [2023-08-24 12:41:37,062 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -9 predicate places. [2023-08-24 12:41:37,062 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 0 transitions, 0 flow [2023-08-24 12:41:37,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 121.42857142857143) internal successors, (850), 7 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:37,065 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:41:37,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 12:41:37,269 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 [2023-08-24 12:41:37,270 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:41:37,271 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:41:37,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 147 transitions, 302 flow [2023-08-24 12:41:37,284 INFO L124 PetriNetUnfolderBase]: 24/186 cut-off events. [2023-08-24 12:41:37,284 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:41:37,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 24/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 508 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 106. Up to 4 conditions per place. [2023-08-24 12:41:37,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 147 transitions, 302 flow [2023-08-24 12:41:37,285 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:37,285 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:41:37,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:37,286 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:37,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 142 transitions, 289 flow [2023-08-24 12:41:37,294 INFO L124 PetriNetUnfolderBase]: 23/181 cut-off events. [2023-08-24 12:41:37,295 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:41:37,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 181 events. 23/181 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 491 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 106. Up to 4 conditions per place. [2023-08-24 12:41:37,296 INFO L119 LiptonReduction]: Number of co-enabled transitions 5580 [2023-08-24 12:41:39,642 INFO L134 LiptonReduction]: Checked pairs total: 10862 [2023-08-24 12:41:39,642 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-24 12:41:39,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:41:39,644 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c1c27f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:41:39,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:41:39,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:41:39,646 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-24 12:41:39,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:41:39,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:39,646 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:41:39,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:41:39,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1179769747, now seen corresponding path program 1 times [2023-08-24 12:41:39,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:39,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837595019] [2023-08-24 12:41:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:41:39,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:41:39,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:41:39,705 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:41:39,705 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:41:39,705 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:41:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:41:39,705 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:41:39,706 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:41:39,706 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:41:39,706 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:41:39,723 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:41:39,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:39,743 INFO L124 PetriNetUnfolderBase]: 45/314 cut-off events. [2023-08-24 12:41:39,743 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:41:39,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 314 events. 45/314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1075 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2023-08-24 12:41:39,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:39,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:39,745 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:41:39,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:39,746 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:39,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:39,764 INFO L124 PetriNetUnfolderBase]: 45/314 cut-off events. [2023-08-24 12:41:39,764 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:41:39,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 314 events. 45/314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1075 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2023-08-24 12:41:39,772 INFO L119 LiptonReduction]: Number of co-enabled transitions 20212 [2023-08-24 12:41:42,332 INFO L134 LiptonReduction]: Checked pairs total: 54828 [2023-08-24 12:41:42,332 INFO L136 LiptonReduction]: Total number of compositions: 143 [2023-08-24 12:41:42,337 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:41:42,338 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c1c27f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:41:42,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:41:42,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:41:42,340 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2023-08-24 12:41:42,340 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:41:42,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:42,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:41:42,341 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:41:42,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1223739545, now seen corresponding path program 1 times [2023-08-24 12:41:42,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:42,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55361090] [2023-08-24 12:41:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:42,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:42,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:41:42,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55361090] [2023-08-24 12:41:42,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55361090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:41:42,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:41:42,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:41:42,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191497394] [2023-08-24 12:41:42,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:41:42,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:41:42,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:41:42,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:41:42,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:41:42,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 354 [2023-08-24 12:41:42,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 98 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:42,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:41:42,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 354 [2023-08-24 12:41:42,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:41:43,091 INFO L124 PetriNetUnfolderBase]: 8206/13858 cut-off events. [2023-08-24 12:41:43,092 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-24 12:41:43,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26633 conditions, 13858 events. 8206/13858 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 101467 event pairs, 3621 based on Foata normal form. 1612/13736 useless extension candidates. Maximal degree in co-relation 1761. Up to 12614 conditions per place. [2023-08-24 12:41:43,129 INFO L140 encePairwiseOnDemand]: 325/354 looper letters, 65 selfloop transitions, 2 changer transitions 10/93 dead transitions. [2023-08-24 12:41:43,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 354 flow [2023-08-24 12:41:43,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:41:43,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:41:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 621 transitions. [2023-08-24 12:41:43,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5847457627118644 [2023-08-24 12:41:43,131 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 621 transitions. [2023-08-24 12:41:43,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 621 transitions. [2023-08-24 12:41:43,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:41:43,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 621 transitions. [2023-08-24 12:41:43,132 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 207.0) internal successors, (621), 3 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,134 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,134 INFO L175 Difference]: Start difference. First operand has 73 places, 98 transitions, 214 flow. Second operand 3 states and 621 transitions. [2023-08-24 12:41:43,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 354 flow [2023-08-24 12:41:43,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:41:43,140 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 144 flow [2023-08-24 12:41:43,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=144, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2023-08-24 12:41:43,143 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-24 12:41:43,144 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 144 flow [2023-08-24 12:41:43,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:43,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:41:43,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:41:43,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:41:43,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:43,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1819987062, now seen corresponding path program 1 times [2023-08-24 12:41:43,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:43,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778781602] [2023-08-24 12:41:43,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:43,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:43,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:41:43,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778781602] [2023-08-24 12:41:43,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778781602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:41:43,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384736903] [2023-08-24 12:41:43,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:43,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:41:43,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:41:43,181 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) [2023-08-24 12:41:43,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 12:41:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:43,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:41:43,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:41:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:43,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:41:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:43,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384736903] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:41:43,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:41:43,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 12:41:43,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447626687] [2023-08-24 12:41:43,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:41:43,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 12:41:43,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:41:43,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 12:41:43,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 12:41:43,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 354 [2023-08-24 12:41:43,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:41:43,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 354 [2023-08-24 12:41:43,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:41:43,531 INFO L124 PetriNetUnfolderBase]: 1768/3031 cut-off events. [2023-08-24 12:41:43,531 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2023-08-24 12:41:43,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6330 conditions, 3031 events. 1768/3031 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 18130 event pairs, 76 based on Foata normal form. 361/3259 useless extension candidates. Maximal degree in co-relation 438. Up to 2052 conditions per place. [2023-08-24 12:41:43,535 INFO L140 encePairwiseOnDemand]: 351/354 looper letters, 0 selfloop transitions, 0 changer transitions 115/115 dead transitions. [2023-08-24 12:41:43,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 115 transitions, 448 flow [2023-08-24 12:41:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:41:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:41:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 948 transitions. [2023-08-24 12:41:43,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.535593220338983 [2023-08-24 12:41:43,538 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 948 transitions. [2023-08-24 12:41:43,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 948 transitions. [2023-08-24 12:41:43,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:41:43,538 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 948 transitions. [2023-08-24 12:41:43,540 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 189.6) internal successors, (948), 5 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,542 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,543 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 144 flow. Second operand 5 states and 948 transitions. [2023-08-24 12:41:43,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 115 transitions, 448 flow [2023-08-24 12:41:43,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 115 transitions, 446 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:41:43,545 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-08-24 12:41:43,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-08-24 12:41:43,547 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2023-08-24 12:41:43,547 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-08-24 12:41:43,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 171.16666666666666) internal successors, (1027), 6 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:43,548 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:41:43,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 12:41:43,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:41:43,752 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:41:43,752 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:41:43,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:43,770 INFO L124 PetriNetUnfolderBase]: 45/314 cut-off events. [2023-08-24 12:41:43,770 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:41:43,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 314 events. 45/314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1075 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2023-08-24 12:41:43,771 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:43,772 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:43,772 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:41:43,772 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:43,772 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:43,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 211 transitions, 440 flow [2023-08-24 12:41:43,787 INFO L124 PetriNetUnfolderBase]: 45/314 cut-off events. [2023-08-24 12:41:43,788 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:41:43,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 314 events. 45/314 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1075 event pairs, 0 based on Foata normal form. 0/262 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2023-08-24 12:41:43,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 20212 [2023-08-24 12:41:46,353 INFO L134 LiptonReduction]: Checked pairs total: 54956 [2023-08-24 12:41:46,353 INFO L136 LiptonReduction]: Total number of compositions: 142 [2023-08-24 12:41:46,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:41:46,355 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c1c27f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:41:46,355 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:41:46,358 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:41:46,358 INFO L124 PetriNetUnfolderBase]: 12/69 cut-off events. [2023-08-24 12:41:46,358 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 12:41:46,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:46,358 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:41:46,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:41:46,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:46,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2138673819, now seen corresponding path program 1 times [2023-08-24 12:41:46,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:46,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683767617] [2023-08-24 12:41:46,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:46,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:41:46,370 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:41:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:41:46,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:41:46,379 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:41:46,379 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:41:46,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:41:46,379 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:41:46,380 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:41:46,380 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:41:46,380 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:41:46,396 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:41:46,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 580 flow [2023-08-24 12:41:46,433 INFO L124 PetriNetUnfolderBase]: 71/475 cut-off events. [2023-08-24 12:41:46,434 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:41:46,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 475 events. 71/475 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1849 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 322. Up to 16 conditions per place. [2023-08-24 12:41:46,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 580 flow [2023-08-24 12:41:46,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 580 flow [2023-08-24 12:41:46,439 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:41:46,440 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 275 transitions, 580 flow [2023-08-24 12:41:46,440 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 275 transitions, 580 flow [2023-08-24 12:41:46,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 580 flow [2023-08-24 12:41:46,472 INFO L124 PetriNetUnfolderBase]: 71/475 cut-off events. [2023-08-24 12:41:46,473 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:41:46,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 475 events. 71/475 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1849 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 322. Up to 16 conditions per place. [2023-08-24 12:41:46,482 INFO L119 LiptonReduction]: Number of co-enabled transitions 42408 [2023-08-24 12:41:49,229 INFO L134 LiptonReduction]: Checked pairs total: 123395 [2023-08-24 12:41:49,229 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-08-24 12:41:49,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:41:49,231 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c1c27f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:41:49,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:41:49,232 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:41:49,232 INFO L124 PetriNetUnfolderBase]: 2/25 cut-off events. [2023-08-24 12:41:49,232 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:41:49,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:49,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:41:49,233 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:41:49,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:49,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1746503666, now seen corresponding path program 1 times [2023-08-24 12:41:49,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:49,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667410799] [2023-08-24 12:41:49,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:49,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:49,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:41:49,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667410799] [2023-08-24 12:41:49,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667410799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:41:49,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:41:49,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:41:49,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941634198] [2023-08-24 12:41:49,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:41:49,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:41:49,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:41:49,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:41:49,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:41:49,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 454 [2023-08-24 12:41:49,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 137 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:41:49,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:41:49,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 454 [2023-08-24 12:41:49,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:03,210 INFO L124 PetriNetUnfolderBase]: 184540/274946 cut-off events. [2023-08-24 12:42:03,210 INFO L125 PetriNetUnfolderBase]: For 3619/3619 co-relation queries the response was YES. [2023-08-24 12:42:03,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527408 conditions, 274946 events. 184540/274946 cut-off events. For 3619/3619 co-relation queries the response was YES. Maximal size of possible extension queue 7217. Compared 2432761 event pairs, 112506 based on Foata normal form. 33466/277520 useless extension candidates. Maximal degree in co-relation 23987. Up to 249862 conditions per place. [2023-08-24 12:42:03,997 INFO L140 encePairwiseOnDemand]: 413/454 looper letters, 79 selfloop transitions, 2 changer transitions 11/119 dead transitions. [2023-08-24 12:42:03,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 119 transitions, 448 flow [2023-08-24 12:42:03,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:42:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:42:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 798 transitions. [2023-08-24 12:42:03,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5859030837004405 [2023-08-24 12:42:03,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 798 transitions. [2023-08-24 12:42:03,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 798 transitions. [2023-08-24 12:42:04,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:04,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 798 transitions. [2023-08-24 12:42:04,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 266.0) internal successors, (798), 3 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:04,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:04,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 454.0) internal successors, (1816), 4 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:04,004 INFO L175 Difference]: Start difference. First operand has 100 places, 137 transitions, 304 flow. Second operand 3 states and 798 transitions. [2023-08-24 12:42:04,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 119 transitions, 448 flow [2023-08-24 12:42:04,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 119 transitions, 448 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:42:04,008 INFO L231 Difference]: Finished difference. Result has 103 places, 89 transitions, 203 flow [2023-08-24 12:42:04,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=203, PETRI_PLACES=103, PETRI_TRANSITIONS=89} [2023-08-24 12:42:04,009 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, 3 predicate places. [2023-08-24 12:42:04,009 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 89 transitions, 203 flow [2023-08-24 12:42:04,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:04,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:04,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:42:04,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 12:42:04,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:04,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1003380062, now seen corresponding path program 1 times [2023-08-24 12:42:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:04,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193646502] [2023-08-24 12:42:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:04,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:04,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:42:04,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:04,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193646502] [2023-08-24 12:42:04,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193646502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:42:04,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356084491] [2023-08-24 12:42:04,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:04,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:42:04,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:42:04,055 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) [2023-08-24 12:42:04,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 12:42:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:04,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:42:04,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:42:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:42:04,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:42:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:42:04,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356084491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:42:04,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:42:04,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:42:04,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812368291] [2023-08-24 12:42:04,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:42:04,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:42:04,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:42:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:42:04,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 454 [2023-08-24 12:42:04,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 89 transitions, 203 flow. Second operand has 7 states, 7 states have (on average 221.42857142857142) internal successors, (1550), 7 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:04,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:04,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 454 [2023-08-24 12:42:04,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:42:07,218 INFO L124 PetriNetUnfolderBase]: 41059/59519 cut-off events. [2023-08-24 12:42:07,218 INFO L125 PetriNetUnfolderBase]: For 6462/6462 co-relation queries the response was YES. [2023-08-24 12:42:07,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122766 conditions, 59519 events. 41059/59519 cut-off events. For 6462/6462 co-relation queries the response was YES. Maximal size of possible extension queue 1762. Compared 436505 event pairs, 1530 based on Foata normal form. 5220/61942 useless extension candidates. Maximal degree in co-relation 8551. Up to 39168 conditions per place. [2023-08-24 12:42:07,315 INFO L140 encePairwiseOnDemand]: 451/454 looper letters, 0 selfloop transitions, 0 changer transitions 191/191 dead transitions. [2023-08-24 12:42:07,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 191 transitions, 739 flow [2023-08-24 12:42:07,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:42:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:42:07,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1483 transitions. [2023-08-24 12:42:07,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444199706314243 [2023-08-24 12:42:07,319 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1483 transitions. [2023-08-24 12:42:07,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1483 transitions. [2023-08-24 12:42:07,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:42:07,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1483 transitions. [2023-08-24 12:42:07,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 247.16666666666666) internal successors, (1483), 6 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:07,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:07,325 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 454.0) internal successors, (3178), 7 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:07,325 INFO L175 Difference]: Start difference. First operand has 103 places, 89 transitions, 203 flow. Second operand 6 states and 1483 transitions. [2023-08-24 12:42:07,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 191 transitions, 739 flow [2023-08-24 12:42:07,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 191 transitions, 735 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 12:42:07,328 INFO L231 Difference]: Finished difference. Result has 93 places, 0 transitions, 0 flow [2023-08-24 12:42:07,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=454, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=93, PETRI_TRANSITIONS=0} [2023-08-24 12:42:07,328 INFO L281 CegarLoopForPetriNet]: 100 programPoint places, -7 predicate places. [2023-08-24 12:42:07,328 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 0 transitions, 0 flow [2023-08-24 12:42:07,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 221.42857142857142) internal successors, (1550), 7 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:07,329 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:42:07,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 12:42:07,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:42:07,533 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:42:07,534 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:42:07,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 580 flow [2023-08-24 12:42:07,566 INFO L124 PetriNetUnfolderBase]: 71/475 cut-off events. [2023-08-24 12:42:07,566 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:42:07,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 475 events. 71/475 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1849 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 322. Up to 16 conditions per place. [2023-08-24 12:42:07,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 235 places, 275 transitions, 580 flow [2023-08-24 12:42:07,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 235 places, 275 transitions, 580 flow [2023-08-24 12:42:07,570 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:07,570 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 275 transitions, 580 flow [2023-08-24 12:42:07,570 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 275 transitions, 580 flow [2023-08-24 12:42:07,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 275 transitions, 580 flow [2023-08-24 12:42:07,599 INFO L124 PetriNetUnfolderBase]: 71/475 cut-off events. [2023-08-24 12:42:07,599 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:42:07,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 475 events. 71/475 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1849 event pairs, 1 based on Foata normal form. 0/396 useless extension candidates. Maximal degree in co-relation 322. Up to 16 conditions per place. [2023-08-24 12:42:07,609 INFO L119 LiptonReduction]: Number of co-enabled transitions 42408 [2023-08-24 12:42:10,261 INFO L134 LiptonReduction]: Checked pairs total: 123516 [2023-08-24 12:42:10,261 INFO L136 LiptonReduction]: Total number of compositions: 179 [2023-08-24 12:42:10,262 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:42:10,263 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c1c27f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:10,263 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:10,268 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:10,268 INFO L124 PetriNetUnfolderBase]: 24/115 cut-off events. [2023-08-24 12:42:10,268 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-24 12:42:10,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:10,268 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:42:10,268 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:42:10,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:10,268 INFO L85 PathProgramCache]: Analyzing trace with hash 151627241, now seen corresponding path program 1 times [2023-08-24 12:42:10,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:10,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513675289] [2023-08-24 12:42:10,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:10,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:10,291 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:42:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:42:10,301 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:42:10,301 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:42:10,301 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:42:10,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:42:10,302 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:42:10,302 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:42:10,302 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:42:10,302 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:42:10,320 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:42:10,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 722 flow [2023-08-24 12:42:10,381 INFO L124 PetriNetUnfolderBase]: 109/704 cut-off events. [2023-08-24 12:42:10,381 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:42:10,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 704 events. 109/704 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2967 event pairs, 6 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 495. Up to 32 conditions per place. [2023-08-24 12:42:10,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 287 places, 339 transitions, 722 flow [2023-08-24 12:42:10,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 287 places, 339 transitions, 722 flow [2023-08-24 12:42:10,391 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:42:10,391 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 287 places, 339 transitions, 722 flow [2023-08-24 12:42:10,392 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 287 places, 339 transitions, 722 flow [2023-08-24 12:42:10,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 287 places, 339 transitions, 722 flow [2023-08-24 12:42:10,450 INFO L124 PetriNetUnfolderBase]: 109/704 cut-off events. [2023-08-24 12:42:10,450 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:42:10,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 759 conditions, 704 events. 109/704 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2967 event pairs, 6 based on Foata normal form. 0/590 useless extension candidates. Maximal degree in co-relation 495. Up to 32 conditions per place. [2023-08-24 12:42:10,572 INFO L119 LiptonReduction]: Number of co-enabled transitions 72664 [2023-08-24 12:42:13,631 INFO L134 LiptonReduction]: Checked pairs total: 243221 [2023-08-24 12:42:13,632 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-24 12:42:13,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:42:13,637 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7c1c27f0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:42:13,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:42:13,639 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:42:13,639 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-24 12:42:13,639 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:42:13,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:42:13,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:42:13,640 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:42:13,640 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:42:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash 2139199905, now seen corresponding path program 1 times [2023-08-24 12:42:13,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:42:13,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092623333] [2023-08-24 12:42:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:42:13,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:42:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:42:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:42:13,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:42:13,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092623333] [2023-08-24 12:42:13,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092623333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:42:13,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:42:13,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:42:13,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941306353] [2023-08-24 12:42:13,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:42:13,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:42:13,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:42:13,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:42:13,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:42:13,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 553 [2023-08-24 12:42:13,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 176 transitions, 396 flow. Second operand has 3 states, 3 states have (on average 270.6666666666667) internal successors, (812), 3 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 12:42:13,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:42:13,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 553 [2023-08-24 12:42:13,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand