/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_12-ptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 12:39:44,165 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 12:39:44,231 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 12:39:44,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 12:39:44,235 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 12:39:44,252 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 12:39:44,253 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 12:39:44,253 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 12:39:44,254 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 12:39:44,257 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 12:39:44,257 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 12:39:44,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 12:39:44,258 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 12:39:44,259 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 12:39:44,259 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 12:39:44,259 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 12:39:44,260 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 12:39:44,260 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 12:39:44,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 12:39:44,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 12:39:44,260 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 12:39:44,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 12:39:44,261 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 12:39:44,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 12:39:44,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 12:39:44,262 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 12:39:44,262 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 12:39:44,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:39:44,263 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 12:39:44,263 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 12:39:44,264 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 12:39:44,264 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 12:39:44,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 12:39:44,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 12:39:44,264 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 12:39:44,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 12:39:44,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 12:39:44,600 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 12:39:44,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 12:39:44,603 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 12:39:44,603 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 12:39:44,604 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-24 12:39:45,887 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 12:39:46,205 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 12:39:46,205 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_12-ptr_racefree.i [2023-08-24 12:39:46,217 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91689f839/f7b6e225bbf34699b40b076cbab33ef0/FLAG196835e75 [2023-08-24 12:39:46,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91689f839/f7b6e225bbf34699b40b076cbab33ef0 [2023-08-24 12:39:46,231 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 12:39:46,232 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 12:39:46,233 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 12:39:46,233 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 12:39:46,235 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 12:39:46,236 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,237 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bb032db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46, skipping insertion in model container [2023-08-24 12:39:46,237 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,283 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 12:39:46,591 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_12-ptr_racefree.i[30176,30189] [2023-08-24 12:39:46,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:39:46,622 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 12:39:46,648 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:39:46,650 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-24 12:39:46,667 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_12-ptr_racefree.i[30176,30189] [2023-08-24 12:39:46,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 12:39:46,721 INFO L206 MainTranslator]: Completed translation [2023-08-24 12:39:46,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46 WrapperNode [2023-08-24 12:39:46,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 12:39:46,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 12:39:46,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 12:39:46,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 12:39:46,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,757 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,782 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-24 12:39:46,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 12:39:46,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 12:39:46,784 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 12:39:46,784 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 12:39:46,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,821 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,824 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,826 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,827 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,829 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 12:39:46,829 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 12:39:46,829 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 12:39:46,830 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 12:39:46,830 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (1/1) ... [2023-08-24 12:39:46,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 12:39:46,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:39:46,865 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 12:39:46,872 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 12:39:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 12:39:46,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 12:39:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-24 12:39:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 12:39:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 12:39:46,906 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-24 12:39:46,906 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-24 12:39:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 12:39:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 12:39:46,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 12:39:46,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 12:39:46,908 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 12:39:47,031 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 12:39:47,033 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 12:39:47,209 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 12:39:47,216 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 12:39:47,216 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-24 12:39:47,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:39:47 BoogieIcfgContainer [2023-08-24 12:39:47,218 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 12:39:47,220 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 12:39:47,220 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 12:39:47,222 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 12:39:47,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 12:39:46" (1/3) ... [2023-08-24 12:39:47,223 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b6d32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:39:47, skipping insertion in model container [2023-08-24 12:39:47,223 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 12:39:46" (2/3) ... [2023-08-24 12:39:47,224 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b6d32c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 12:39:47, skipping insertion in model container [2023-08-24 12:39:47,224 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 12:39:47" (3/3) ... [2023-08-24 12:39:47,225 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_12-ptr_racefree.i [2023-08-24 12:39:47,238 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 12:39:47,239 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 12:39:47,239 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 12:39:47,320 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-24 12:39:47,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 246 flow [2023-08-24 12:39:47,440 INFO L124 PetriNetUnfolderBase]: 17/156 cut-off events. [2023-08-24 12:39:47,440 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:39:47,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 369 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-24 12:39:47,450 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 246 flow [2023-08-24 12:39:47,455 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:47,459 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:39:47,471 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:47,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:47,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:47,527 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-08-24 12:39:47,527 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:47,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 348 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-24 12:39:47,530 INFO L119 LiptonReduction]: Number of co-enabled transitions 2838 [2023-08-24 12:39:50,656 INFO L134 LiptonReduction]: Checked pairs total: 5319 [2023-08-24 12:39:50,657 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-24 12:39:50,667 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:39:50,673 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:39:50,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:39:50,676 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:39:50,676 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 12:39:50,677 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:50,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:50,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:39:50,678 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:39:50,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:50,682 INFO L85 PathProgramCache]: Analyzing trace with hash 13895078, now seen corresponding path program 1 times [2023-08-24 12:39:50,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:50,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193518413] [2023-08-24 12:39:50,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:50,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:50,897 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 12:39:50,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:39:50,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193518413] [2023-08-24 12:39:50,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193518413] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:39:50,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:39:50,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:39:50,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526239636] [2023-08-24 12:39:50,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:39:50,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:39:50,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:39:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:39:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:39:50,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 216 [2023-08-24 12:39:50,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 32 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 12:39:50,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:39:50,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 216 [2023-08-24 12:39:50,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:39:50,994 INFO L124 PetriNetUnfolderBase]: 80/188 cut-off events. [2023-08-24 12:39:50,994 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:50,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 188 events. 80/188 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 634 event pairs, 63 based on Foata normal form. 9/174 useless extension candidates. Maximal degree in co-relation 361. Up to 169 conditions per place. [2023-08-24 12:39:50,996 INFO L140 encePairwiseOnDemand]: 204/216 looper letters, 25 selfloop transitions, 2 changer transitions 6/34 dead transitions. [2023-08-24 12:39:50,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 135 flow [2023-08-24 12:39:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:39:51,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:39:51,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-24 12:39:51,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216049382716049 [2023-08-24 12:39:51,009 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-24 12:39:51,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-24 12:39:51,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:39:51,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-24 12:39:51,016 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 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 12:39:51,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 12:39:51,020 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 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 12:39:51,021 INFO L175 Difference]: Start difference. First operand has 27 places, 32 transitions, 69 flow. Second operand 3 states and 338 transitions. [2023-08-24 12:39:51,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 135 flow [2023-08-24 12:39:51,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 135 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:39:51,025 INFO L231 Difference]: Finished difference. Result has 29 places, 18 transitions, 47 flow [2023-08-24 12:39:51,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=29, PETRI_TRANSITIONS=18} [2023-08-24 12:39:51,030 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 2 predicate places. [2023-08-24 12:39:51,030 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 18 transitions, 47 flow [2023-08-24 12:39:51,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 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 12:39:51,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:51,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:39:51,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 12:39:51,031 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:39:51,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1371315533, now seen corresponding path program 1 times [2023-08-24 12:39:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:51,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848102965] [2023-08-24 12:39:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:51,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:51,104 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 12:39:51,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:39:51,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848102965] [2023-08-24 12:39:51,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848102965] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:39:51,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306753451] [2023-08-24 12:39:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:39:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:39:51,109 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 12:39:51,165 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 12:39:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:51,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:39:51,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:39:51,302 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 12:39:51,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:39:51,320 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 12:39:51,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306753451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:39:51,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:39:51,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:39:51,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800691088] [2023-08-24 12:39:51,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:39:51,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:39:51,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:39:51,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:39:51,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:39:51,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 216 [2023-08-24 12:39:51,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 18 transitions, 47 flow. Second operand has 7 states, 7 states have (on average 99.28571428571429) internal successors, (695), 7 states have internal predecessors, (695), 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 12:39:51,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:39:51,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 216 [2023-08-24 12:39:51,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:39:51,380 INFO L124 PetriNetUnfolderBase]: 20/56 cut-off events. [2023-08-24 12:39:51,381 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:39:51,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141 conditions, 56 events. 20/56 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 105 event pairs, 0 based on Foata normal form. 11/67 useless extension candidates. Maximal degree in co-relation 127. Up to 42 conditions per place. [2023-08-24 12:39:51,384 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 0 selfloop transitions, 0 changer transitions 26/26 dead transitions. [2023-08-24 12:39:51,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 26 transitions, 111 flow [2023-08-24 12:39:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 12:39:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 12:39:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 414 transitions. [2023-08-24 12:39:51,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-24 12:39:51,388 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 414 transitions. [2023-08-24 12:39:51,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 414 transitions. [2023-08-24 12:39:51,389 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:39:51,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 414 transitions. [2023-08-24 12:39:51,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 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 12:39:51,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 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 12:39:51,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 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 12:39:51,398 INFO L175 Difference]: Start difference. First operand has 29 places, 18 transitions, 47 flow. Second operand 4 states and 414 transitions. [2023-08-24 12:39:51,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 26 transitions, 111 flow [2023-08-24 12:39:51,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 12:39:51,402 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-24 12:39:51,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=33, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-24 12:39:51,403 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, -6 predicate places. [2023-08-24 12:39:51,403 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-24 12:39:51,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 99.28571428571429) internal successors, (695), 7 states have internal predecessors, (695), 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 12:39:51,406 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:39:51,415 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 12:39:51,613 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 12:39:51,613 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:39:51,615 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:39:51,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 246 flow [2023-08-24 12:39:51,632 INFO L124 PetriNetUnfolderBase]: 17/156 cut-off events. [2023-08-24 12:39:51,632 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-24 12:39:51,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 369 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-24 12:39:51,632 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 246 flow [2023-08-24 12:39:51,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:51,633 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:39:51,634 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:51,634 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:51,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 114 transitions, 233 flow [2023-08-24 12:39:51,645 INFO L124 PetriNetUnfolderBase]: 16/151 cut-off events. [2023-08-24 12:39:51,645 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:51,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 348 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-08-24 12:39:51,647 INFO L119 LiptonReduction]: Number of co-enabled transitions 2838 [2023-08-24 12:39:54,188 INFO L134 LiptonReduction]: Checked pairs total: 5007 [2023-08-24 12:39:54,189 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-24 12:39:54,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:39:54,192 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:39:54,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:39:54,195 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:39:54,195 INFO L124 PetriNetUnfolderBase]: 2/19 cut-off events. [2023-08-24 12:39:54,195 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:54,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:54,195 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-24 12:39:54,195 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:39:54,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash -967458729, now seen corresponding path program 1 times [2023-08-24 12:39:54,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:54,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772615415] [2023-08-24 12:39:54,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:39:54,226 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:39:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:39:54,251 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:39:54,251 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:39:54,251 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:39:54,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 12:39:54,252 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:39:54,252 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:39:54,253 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:39:54,253 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 12:39:54,270 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 12:39:54,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:54,296 INFO L124 PetriNetUnfolderBase]: 31/253 cut-off events. [2023-08-24 12:39:54,296 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:39:54,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-24 12:39:54,297 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:54,299 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:54,299 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:39:54,299 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:54,300 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:54,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:54,327 INFO L124 PetriNetUnfolderBase]: 31/253 cut-off events. [2023-08-24 12:39:54,327 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:39:54,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-24 12:39:54,333 INFO L119 LiptonReduction]: Number of co-enabled transitions 8580 [2023-08-24 12:39:57,008 INFO L134 LiptonReduction]: Checked pairs total: 16985 [2023-08-24 12:39:57,008 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-24 12:39:57,010 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:39:57,011 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:39:57,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:39:57,013 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:39:57,013 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 12:39:57,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:39:57,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:57,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:39:57,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:39:57,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash 26361201, now seen corresponding path program 1 times [2023-08-24 12:39:57,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:57,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564319057] [2023-08-24 12:39:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:57,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:57,078 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 12:39:57,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:39:57,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564319057] [2023-08-24 12:39:57,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564319057] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:39:57,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:39:57,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:39:57,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696371367] [2023-08-24 12:39:57,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:39:57,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:39:57,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:39:57,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:39:57,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:39:57,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 273 [2023-08-24 12:39:57,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 12:39:57,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:39:57,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 273 [2023-08-24 12:39:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:39:57,405 INFO L124 PetriNetUnfolderBase]: 1642/2913 cut-off events. [2023-08-24 12:39:57,405 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:39:57,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5667 conditions, 2913 events. 1642/2913 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 17151 event pairs, 752 based on Foata normal form. 428/3024 useless extension candidates. Maximal degree in co-relation 585. Up to 2673 conditions per place. [2023-08-24 12:39:57,415 INFO L140 encePairwiseOnDemand]: 256/273 looper letters, 32 selfloop transitions, 2 changer transitions 10/51 dead transitions. [2023-08-24 12:39:57,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2023-08-24 12:39:57,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:39:57,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:39:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-24 12:39:57,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311355311355311 [2023-08-24 12:39:57,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-24 12:39:57,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-24 12:39:57,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:39:57,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-24 12:39:57,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 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 12:39:57,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 12:39:57,421 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 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 12:39:57,421 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 435 transitions. [2023-08-24 12:39:57,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2023-08-24 12:39:57,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:39:57,423 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 82 flow [2023-08-24 12:39:57,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2023-08-24 12:39:57,426 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-24 12:39:57,431 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 82 flow [2023-08-24 12:39:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 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 12:39:57,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:39:57,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:39:57,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 12:39:57,432 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:39:57,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:39:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1084117276, now seen corresponding path program 1 times [2023-08-24 12:39:57,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:39:57,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841257213] [2023-08-24 12:39:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:57,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:39:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:57,471 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 12:39:57,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:39:57,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841257213] [2023-08-24 12:39:57,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841257213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:39:57,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408182252] [2023-08-24 12:39:57,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:39:57,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:39:57,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:39:57,473 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 12:39:57,487 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 12:39:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:39:57,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:39:57,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:39:57,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:39:57,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:39:57,582 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 12:39:57,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408182252] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:39:57,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:39:57,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-24 12:39:57,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186777283] [2023-08-24 12:39:57,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:39:57,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 12:39:57,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:39:57,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 12:39:57,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-24 12:39:57,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 273 [2023-08-24 12:39:57,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 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 12:39:57,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:39:57,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 273 [2023-08-24 12:39:57,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:39:57,683 INFO L124 PetriNetUnfolderBase]: 376/688 cut-off events. [2023-08-24 12:39:57,684 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-08-24 12:39:57,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1471 conditions, 688 events. 376/688 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 3203 event pairs, 0 based on Foata normal form. 90/777 useless extension candidates. Maximal degree in co-relation 163. Up to 450 conditions per place. [2023-08-24 12:39:57,685 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-24 12:39:57,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 222 flow [2023-08-24 12:39:57,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 12:39:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 12:39:57,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 670 transitions. [2023-08-24 12:39:57,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908424908424908 [2023-08-24 12:39:57,688 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 670 transitions. [2023-08-24 12:39:57,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 670 transitions. [2023-08-24 12:39:57,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:39:57,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 670 transitions. [2023-08-24 12:39:57,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.0) internal successors, (670), 5 states have internal predecessors, (670), 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 12:39:57,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 12:39:57,692 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 273.0) internal successors, (1638), 6 states have internal predecessors, (1638), 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 12:39:57,692 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 82 flow. Second operand 5 states and 670 transitions. [2023-08-24 12:39:57,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 222 flow [2023-08-24 12:39:57,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 55 transitions, 220 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 12:39:57,694 INFO L231 Difference]: Finished difference. Result has 39 places, 0 transitions, 0 flow [2023-08-24 12:39:57,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=39, PETRI_TRANSITIONS=0} [2023-08-24 12:39:57,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2023-08-24 12:39:57,695 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 0 transitions, 0 flow [2023-08-24 12:39:57,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 126.0) internal successors, (756), 6 states have internal predecessors, (756), 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 12:39:57,695 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:39:57,703 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 12:39:57,900 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 12:39:57,901 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:39:57,901 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:39:57,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:57,922 INFO L124 PetriNetUnfolderBase]: 31/253 cut-off events. [2023-08-24 12:39:57,922 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:39:57,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-24 12:39:57,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:57,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:57,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:39:57,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:57,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:57,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 326 flow [2023-08-24 12:39:57,942 INFO L124 PetriNetUnfolderBase]: 31/253 cut-off events. [2023-08-24 12:39:57,942 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-24 12:39:57,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 253 events. 31/253 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-08-24 12:39:57,947 INFO L119 LiptonReduction]: Number of co-enabled transitions 8580 [2023-08-24 12:40:00,509 INFO L134 LiptonReduction]: Checked pairs total: 16985 [2023-08-24 12:40:00,509 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-24 12:40:00,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:40:00,511 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:00,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:40:00,515 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:00,515 INFO L124 PetriNetUnfolderBase]: 10/53 cut-off events. [2023-08-24 12:40:00,515 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 12:40:00,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:00,515 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-24 12:40:00,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:40:00,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1521802842, now seen corresponding path program 1 times [2023-08-24 12:40:00,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:00,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82738795] [2023-08-24 12:40:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:00,541 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:40:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:00,566 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:40:00,566 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:40:00,567 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:40:00,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 12:40:00,567 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:40:00,568 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:40:00,568 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:40:00,568 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-24 12:40:00,598 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 12:40:00,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:00,633 INFO L124 PetriNetUnfolderBase]: 50/383 cut-off events. [2023-08-24 12:40:00,633 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:00,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 50/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1286 event pairs, 1 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-24 12:40:00,636 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:00,638 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:00,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:00,638 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:00,638 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:00,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:00,679 INFO L124 PetriNetUnfolderBase]: 50/383 cut-off events. [2023-08-24 12:40:00,679 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 50/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1286 event pairs, 1 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-24 12:40:00,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 16434 [2023-08-24 12:40:03,642 INFO L134 LiptonReduction]: Checked pairs total: 39583 [2023-08-24 12:40:03,642 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-24 12:40:03,644 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:40:03,644 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:03,644 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:40:03,646 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:03,646 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2023-08-24 12:40:03,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:40:03,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:03,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:40:03,646 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:40:03,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash 41196672, now seen corresponding path program 1 times [2023-08-24 12:40:03,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:03,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147898394] [2023-08-24 12:40:03,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:03,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:03,672 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 12:40:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147898394] [2023-08-24 12:40:03,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147898394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:40:03,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:40:03,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:40:03,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896008492] [2023-08-24 12:40:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:40:03,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:40:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:40:03,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:40:03,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 328 [2023-08-24 12:40:03,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 12:40:03,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:03,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 328 [2023-08-24 12:40:03,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:06,928 INFO L124 PetriNetUnfolderBase]: 32280/46590 cut-off events. [2023-08-24 12:40:06,928 INFO L125 PetriNetUnfolderBase]: For 1317/1317 co-relation queries the response was YES. [2023-08-24 12:40:07,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92819 conditions, 46590 events. 32280/46590 cut-off events. For 1317/1317 co-relation queries the response was YES. Maximal size of possible extension queue 1061. Compared 302464 event pairs, 21006 based on Foata normal form. 5103/47961 useless extension candidates. Maximal degree in co-relation 7949. Up to 45346 conditions per place. [2023-08-24 12:40:07,105 INFO L140 encePairwiseOnDemand]: 305/328 looper letters, 44 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-08-24 12:40:07,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 64 transitions, 268 flow [2023-08-24 12:40:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:40:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:40:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-24 12:40:07,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436991869918699 [2023-08-24 12:40:07,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-24 12:40:07,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-24 12:40:07,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:07,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-24 12:40:07,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 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 12:40:07,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 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 12:40:07,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 328.0) internal successors, (1312), 4 states have internal predecessors, (1312), 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 12:40:07,112 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 535 transitions. [2023-08-24 12:40:07,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 64 transitions, 268 flow [2023-08-24 12:40:07,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 268 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:40:07,119 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 113 flow [2023-08-24 12:40:07,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=113, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2023-08-24 12:40:07,121 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-24 12:40:07,121 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 113 flow [2023-08-24 12:40:07,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 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 12:40:07,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:07,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:40:07,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 12:40:07,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:40:07,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:07,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1369315572, now seen corresponding path program 1 times [2023-08-24 12:40:07,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:07,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826028805] [2023-08-24 12:40:07,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:07,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:07,194 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 12:40:07,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826028805] [2023-08-24 12:40:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826028805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:40:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921803793] [2023-08-24 12:40:07,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:07,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:40:07,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:40:07,197 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 12:40:07,220 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 12:40:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:07,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:40:07,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:40:07,291 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 12:40:07,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:40:07,306 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 12:40:07,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921803793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:40:07,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:40:07,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:40:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8219785] [2023-08-24 12:40:07,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:40:07,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:40:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:40:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:40:07,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 328 [2023-08-24 12:40:07,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 113 flow. Second operand has 7 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 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 12:40:07,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:07,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 328 [2023-08-24 12:40:07,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:08,199 INFO L124 PetriNetUnfolderBase]: 7582/11197 cut-off events. [2023-08-24 12:40:08,199 INFO L125 PetriNetUnfolderBase]: For 1404/1404 co-relation queries the response was YES. [2023-08-24 12:40:08,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23615 conditions, 11197 events. 7582/11197 cut-off events. For 1404/1404 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 65199 event pairs, 0 based on Foata normal form. 1098/12295 useless extension candidates. Maximal degree in co-relation 2698. Up to 7322 conditions per place. [2023-08-24 12:40:08,215 INFO L140 encePairwiseOnDemand]: 325/328 looper letters, 0 selfloop transitions, 0 changer transitions 98/98 dead transitions. [2023-08-24 12:40:08,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 98 transitions, 403 flow [2023-08-24 12:40:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:40:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:40:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1000 transitions. [2023-08-24 12:40:08,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508130081300813 [2023-08-24 12:40:08,218 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1000 transitions. [2023-08-24 12:40:08,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1000 transitions. [2023-08-24 12:40:08,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:08,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1000 transitions. [2023-08-24 12:40:08,220 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 166.66666666666666) internal successors, (1000), 6 states have internal predecessors, (1000), 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 12:40:08,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 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 12:40:08,223 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 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 12:40:08,223 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 113 flow. Second operand 6 states and 1000 transitions. [2023-08-24 12:40:08,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 98 transitions, 403 flow [2023-08-24 12:40:08,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 98 transitions, 399 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 12:40:08,225 INFO L231 Difference]: Finished difference. Result has 54 places, 0 transitions, 0 flow [2023-08-24 12:40:08,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=54, PETRI_TRANSITIONS=0} [2023-08-24 12:40:08,226 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -4 predicate places. [2023-08-24 12:40:08,226 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 0 transitions, 0 flow [2023-08-24 12:40:08,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 153.28571428571428) internal successors, (1073), 7 states have internal predecessors, (1073), 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 12:40:08,227 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:40:08,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 12:40:08,432 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 12:40:08,432 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-24 12:40:08,433 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:40:08,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:08,463 INFO L124 PetriNetUnfolderBase]: 50/383 cut-off events. [2023-08-24 12:40:08,463 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:08,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 50/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1286 event pairs, 1 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-24 12:40:08,465 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:08,467 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:08,467 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:08,467 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:08,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:08,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 408 flow [2023-08-24 12:40:08,495 INFO L124 PetriNetUnfolderBase]: 50/383 cut-off events. [2023-08-24 12:40:08,495 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-24 12:40:08,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 383 events. 50/383 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1286 event pairs, 1 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 261. Up to 16 conditions per place. [2023-08-24 12:40:08,502 INFO L119 LiptonReduction]: Number of co-enabled transitions 16434 [2023-08-24 12:40:11,313 INFO L134 LiptonReduction]: Checked pairs total: 35425 [2023-08-24 12:40:11,313 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-24 12:40:11,314 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:40:11,315 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:11,315 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:40:11,319 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:11,319 INFO L124 PetriNetUnfolderBase]: 19/87 cut-off events. [2023-08-24 12:40:11,319 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-24 12:40:11,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:11,320 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-24 12:40:11,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:40:11,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:11,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1272363978, now seen corresponding path program 1 times [2023-08-24 12:40:11,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:11,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154515898] [2023-08-24 12:40:11,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:11,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:11,332 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:40:11,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:40:11,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:40:11,344 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:40:11,344 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:40:11,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 12:40:11,345 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:40:11,345 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:40:11,345 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:40:11,345 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-24 12:40:11,365 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 12:40:11,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 492 flow [2023-08-24 12:40:11,422 INFO L124 PetriNetUnfolderBase]: 81/581 cut-off events. [2023-08-24 12:40:11,423 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:40:11,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 581 events. 81/581 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2229 event pairs, 6 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2023-08-24 12:40:11,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 224 transitions, 492 flow [2023-08-24 12:40:11,433 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 224 transitions, 492 flow [2023-08-24 12:40:11,433 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:40:11,433 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 224 transitions, 492 flow [2023-08-24 12:40:11,433 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 224 transitions, 492 flow [2023-08-24 12:40:11,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 492 flow [2023-08-24 12:40:11,483 INFO L124 PetriNetUnfolderBase]: 81/581 cut-off events. [2023-08-24 12:40:11,483 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:40:11,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 581 events. 81/581 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2229 event pairs, 6 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2023-08-24 12:40:11,499 INFO L119 LiptonReduction]: Number of co-enabled transitions 26664 [2023-08-24 12:40:14,378 INFO L134 LiptonReduction]: Checked pairs total: 60254 [2023-08-24 12:40:14,378 INFO L136 LiptonReduction]: Total number of compositions: 159 [2023-08-24 12:40:14,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:40:14,381 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:40:14,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:40:14,382 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:40:14,382 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 12:40:14,382 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:40:14,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:14,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:40:14,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:40:14,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash 58314157, now seen corresponding path program 1 times [2023-08-24 12:40:14,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:14,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613006437] [2023-08-24 12:40:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:14,419 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 12:40:14,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:14,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613006437] [2023-08-24 12:40:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613006437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:40:14,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:40:14,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:40:14,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126817160] [2023-08-24 12:40:14,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:40:14,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:40:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:14,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:40:14,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:40:14,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 383 [2023-08-24 12:40:14,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 12:40:14,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:14,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 383 [2023-08-24 12:40:14,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:40:50,689 INFO L124 PetriNetUnfolderBase]: 411276/561314 cut-off events. [2023-08-24 12:40:50,690 INFO L125 PetriNetUnfolderBase]: For 20950/20950 co-relation queries the response was YES. [2023-08-24 12:40:51,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1108130 conditions, 561314 events. 411276/561314 cut-off events. For 20950/20950 co-relation queries the response was YES. Maximal size of possible extension queue 10645. Compared 4264278 event pairs, 302497 based on Foata normal form. 85320/609593 useless extension candidates. Maximal degree in co-relation 94407. Up to 535317 conditions per place. [2023-08-24 12:40:52,748 INFO L140 encePairwiseOnDemand]: 354/383 looper letters, 54 selfloop transitions, 2 changer transitions 12/78 dead transitions. [2023-08-24 12:40:52,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 78 transitions, 332 flow [2023-08-24 12:40:52,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 12:40:52,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 12:40:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 633 transitions. [2023-08-24 12:40:52,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5509138381201044 [2023-08-24 12:40:52,750 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 633 transitions. [2023-08-24 12:40:52,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 633 transitions. [2023-08-24 12:40:52,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:40:52,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 633 transitions. [2023-08-24 12:40:52,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.0) internal successors, (633), 3 states have internal predecessors, (633), 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 12:40:52,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 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 12:40:52,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 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 12:40:52,754 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 633 transitions. [2023-08-24 12:40:52,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 78 transitions, 332 flow [2023-08-24 12:40:52,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-24 12:40:52,760 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 146 flow [2023-08-24 12:40:52,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2023-08-24 12:40:52,761 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-24 12:40:52,761 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 146 flow [2023-08-24 12:40:52,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 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 12:40:52,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:40:52,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:40:52,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 12:40:52,762 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:40:52,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:40:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1503237832, now seen corresponding path program 1 times [2023-08-24 12:40:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:40:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43098251] [2023-08-24 12:40:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:40:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:52,795 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 12:40:52,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:40:52,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43098251] [2023-08-24 12:40:52,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43098251] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:40:52,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483837958] [2023-08-24 12:40:52,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:40:52,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:40:52,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:40:52,797 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:40:52,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 12:40:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:40:52,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-24 12:40:52,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:40:52,891 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 12:40:52,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:40:52,907 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 12:40:52,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483837958] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:40:52,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:40:52,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-24 12:40:52,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512570159] [2023-08-24 12:40:52,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:40:52,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 12:40:52,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:40:52,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 12:40:52,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 12:40:52,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 383 [2023-08-24 12:40:52,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 146 flow. Second operand has 7 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 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 12:40:52,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:40:52,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 383 [2023-08-24 12:40:52,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:41:07,187 INFO L124 PetriNetUnfolderBase]: 191482/255653 cut-off events. [2023-08-24 12:41:07,187 INFO L125 PetriNetUnfolderBase]: For 16322/16322 co-relation queries the response was YES. [2023-08-24 12:41:07,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528298 conditions, 255653 events. 191482/255653 cut-off events. For 16322/16322 co-relation queries the response was YES. Maximal size of possible extension queue 5430. Compared 1770127 event pairs, 8016 based on Foata normal form. 1110/256762 useless extension candidates. Maximal degree in co-relation 474263. Up to 163477 conditions per place. [2023-08-24 12:41:08,273 INFO L140 encePairwiseOnDemand]: 379/383 looper letters, 136 selfloop transitions, 5 changer transitions 1/152 dead transitions. [2023-08-24 12:41:08,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 152 transitions, 626 flow [2023-08-24 12:41:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 12:41:08,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 12:41:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1213 transitions. [2023-08-24 12:41:08,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5278503046127067 [2023-08-24 12:41:08,280 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1213 transitions. [2023-08-24 12:41:08,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1213 transitions. [2023-08-24 12:41:08,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:41:08,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1213 transitions. [2023-08-24 12:41:08,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 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 12:41:08,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 383.0) internal successors, (2681), 7 states have internal predecessors, (2681), 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 12:41:08,288 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 383.0) internal successors, (2681), 7 states have internal predecessors, (2681), 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 12:41:08,288 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 146 flow. Second operand 6 states and 1213 transitions. [2023-08-24 12:41:08,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 152 transitions, 626 flow [2023-08-24 12:41:08,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 618 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-24 12:41:08,296 INFO L231 Difference]: Finished difference. Result has 75 places, 58 transitions, 172 flow [2023-08-24 12:41:08,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=75, PETRI_TRANSITIONS=58} [2023-08-24 12:41:08,297 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2023-08-24 12:41:08,297 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 58 transitions, 172 flow [2023-08-24 12:41:08,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 180.28571428571428) internal successors, (1262), 7 states have internal predecessors, (1262), 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 12:41:08,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:08,298 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 12:41:08,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 12:41:08,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:41:08,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:41:08,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1324482413, now seen corresponding path program 1 times [2023-08-24 12:41:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361314923] [2023-08-24 12:41:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:08,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:41:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361314923] [2023-08-24 12:41:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361314923] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 12:41:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960379062] [2023-08-24 12:41:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:08,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 12:41:08,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 12:41:08,613 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 12:41:08,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 12:41:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:08,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 12:41:08,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 12:41:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:08,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 12:41:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 12:41:08,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960379062] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 12:41:08,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 12:41:08,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-24 12:41:08,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600480994] [2023-08-24 12:41:08,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 12:41:08,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 12:41:08,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:41:08,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 12:41:08,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-24 12:41:08,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 383 [2023-08-24 12:41:08,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 58 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 180.6153846153846) internal successors, (2348), 13 states have internal predecessors, (2348), 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 12:41:08,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:41:08,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 383 [2023-08-24 12:41:08,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 12:41:13,911 INFO L124 PetriNetUnfolderBase]: 63646/89207 cut-off events. [2023-08-24 12:41:13,911 INFO L125 PetriNetUnfolderBase]: For 70162/70162 co-relation queries the response was YES. [2023-08-24 12:41:14,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208512 conditions, 89207 events. 63646/89207 cut-off events. For 70162/70162 co-relation queries the response was YES. Maximal size of possible extension queue 2076. Compared 601900 event pairs, 96 based on Foata normal form. 8910/98116 useless extension candidates. Maximal degree in co-relation 165802. Up to 40869 conditions per place. [2023-08-24 12:41:14,393 INFO L140 encePairwiseOnDemand]: 380/383 looper letters, 0 selfloop transitions, 0 changer transitions 148/148 dead transitions. [2023-08-24 12:41:14,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 148 transitions, 626 flow [2023-08-24 12:41:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 12:41:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 12:41:14,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1385 transitions. [2023-08-24 12:41:14,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5165982842223051 [2023-08-24 12:41:14,398 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1385 transitions. [2023-08-24 12:41:14,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1385 transitions. [2023-08-24 12:41:14,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 12:41:14,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1385 transitions. [2023-08-24 12:41:14,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 197.85714285714286) internal successors, (1385), 7 states have internal predecessors, (1385), 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 12:41:14,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 383.0) internal successors, (3064), 8 states have internal predecessors, (3064), 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 12:41:14,407 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 383.0) internal successors, (3064), 8 states have internal predecessors, (3064), 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 12:41:14,407 INFO L175 Difference]: Start difference. First operand has 75 places, 58 transitions, 172 flow. Second operand 7 states and 1385 transitions. [2023-08-24 12:41:14,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 148 transitions, 626 flow [2023-08-24 12:41:14,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 148 transitions, 607 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-24 12:41:14,605 INFO L231 Difference]: Finished difference. Result has 71 places, 0 transitions, 0 flow [2023-08-24 12:41:14,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=71, PETRI_TRANSITIONS=0} [2023-08-24 12:41:14,606 INFO L281 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2023-08-24 12:41:14,606 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 0 transitions, 0 flow [2023-08-24 12:41:14,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 180.6153846153846) internal successors, (2348), 13 states have internal predecessors, (2348), 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 12:41:14,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-24 12:41:14,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 12:41:14,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 12:41:14,812 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-24 12:41:14,813 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-24 12:41:14,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 492 flow [2023-08-24 12:41:14,850 INFO L124 PetriNetUnfolderBase]: 81/581 cut-off events. [2023-08-24 12:41:14,850 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:41:14,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 581 events. 81/581 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2229 event pairs, 6 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2023-08-24 12:41:14,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 224 transitions, 492 flow [2023-08-24 12:41:14,857 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 224 transitions, 492 flow [2023-08-24 12:41:14,857 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:41:14,857 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 224 transitions, 492 flow [2023-08-24 12:41:14,857 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 224 transitions, 492 flow [2023-08-24 12:41:14,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 492 flow [2023-08-24 12:41:14,907 INFO L124 PetriNetUnfolderBase]: 81/581 cut-off events. [2023-08-24 12:41:14,908 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-24 12:41:14,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 581 events. 81/581 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2229 event pairs, 6 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 403. Up to 32 conditions per place. [2023-08-24 12:41:14,923 INFO L119 LiptonReduction]: Number of co-enabled transitions 26664 [2023-08-24 12:41:17,886 INFO L134 LiptonReduction]: Checked pairs total: 60198 [2023-08-24 12:41:17,886 INFO L136 LiptonReduction]: Total number of compositions: 160 [2023-08-24 12:41:17,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 12:41:17,888 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:41:17,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:41:17,893 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:41:17,894 INFO L124 PetriNetUnfolderBase]: 29/127 cut-off events. [2023-08-24 12:41:17,894 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-24 12:41:17,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:17,894 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-24 12:41:17,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 12:41:17,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash -878296620, now seen corresponding path program 1 times [2023-08-24 12:41:17,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:17,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844235981] [2023-08-24 12:41:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:17,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:41:17,913 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 12:41:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 12:41:17,926 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 12:41:17,927 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 12:41:17,927 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-24 12:41:17,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 12:41:17,927 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 12:41:17,927 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-24 12:41:17,928 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 12:41:17,928 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-24 12:41:17,948 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-24 12:41:17,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 259 transitions, 578 flow [2023-08-24 12:41:18,042 INFO L124 PetriNetUnfolderBase]: 140/919 cut-off events. [2023-08-24 12:41:18,042 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:41:18,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 919 events. 140/919 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4185 event pairs, 23 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 626. Up to 80 conditions per place. [2023-08-24 12:41:18,050 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 259 transitions, 578 flow [2023-08-24 12:41:18,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 259 transitions, 578 flow [2023-08-24 12:41:18,053 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 12:41:18,053 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 259 transitions, 578 flow [2023-08-24 12:41:18,053 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 259 transitions, 578 flow [2023-08-24 12:41:18,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 259 transitions, 578 flow [2023-08-24 12:41:18,134 INFO L124 PetriNetUnfolderBase]: 140/919 cut-off events. [2023-08-24 12:41:18,135 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-24 12:41:18,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1030 conditions, 919 events. 140/919 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4185 event pairs, 23 based on Foata normal form. 0/789 useless extension candidates. Maximal degree in co-relation 626. Up to 80 conditions per place. [2023-08-24 12:41:18,169 INFO L119 LiptonReduction]: Number of co-enabled transitions 39270 [2023-08-24 12:41:21,237 INFO L134 LiptonReduction]: Checked pairs total: 92557 [2023-08-24 12:41:21,237 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-08-24 12:41:21,238 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 12:41:21,239 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;@32c39324, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 12:41:21,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-24 12:41:21,240 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 12:41:21,240 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 12:41:21,240 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 12:41:21,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 12:41:21,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-24 12:41:21,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 12:41:21,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 12:41:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash 77828669, now seen corresponding path program 1 times [2023-08-24 12:41:21,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 12:41:21,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871286730] [2023-08-24 12:41:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 12:41:21,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 12:41:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 12:41:21,278 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 12:41:21,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 12:41:21,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871286730] [2023-08-24 12:41:21,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871286730] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 12:41:21,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 12:41:21,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 12:41:21,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33090158] [2023-08-24 12:41:21,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 12:41:21,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 12:41:21,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 12:41:21,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 12:41:21,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 12:41:21,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 439 [2023-08-24 12:41:21,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 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 12:41:21,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 12:41:21,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 439 [2023-08-24 12:41:21,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand