/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 20:57:26,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 20:57:26,223 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 [2023-08-26 20:57:26,231 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 20:57:26,232 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 20:57:26,260 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 20:57:26,262 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 20:57:26,262 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 20:57:26,263 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 20:57:26,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 20:57:26,266 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 20:57:26,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 20:57:26,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 20:57:26,266 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 20:57:26,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 20:57:26,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 20:57:26,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 20:57:26,267 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 20:57:26,267 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 20:57:26,267 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 20:57:26,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 20:57:26,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 20:57:26,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 20:57:26,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 20:57:26,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 20:57:26,270 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 20:57:26,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 20:57:26,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:57:26,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 20:57:26,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 20:57:26,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 20:57:26,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 20:57:26,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 20:57:26,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 20:57:26,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 20:57:26,272 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-26 20:57:26,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 20:57:26,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 20:57:26,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 20:57:26,555 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 20:57:26,555 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 20:57:26,557 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-26 20:57:27,545 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 20:57:27,767 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 20:57:27,768 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2023-08-26 20:57:27,779 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18722c2e0/59f3ec646b6e40c7b5c67e5ffdcb5e03/FLAGe73d5e064 [2023-08-26 20:57:27,791 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18722c2e0/59f3ec646b6e40c7b5c67e5ffdcb5e03 [2023-08-26 20:57:27,794 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 20:57:27,796 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 20:57:27,799 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 20:57:27,799 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 20:57:27,801 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 20:57:27,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:57:27" (1/1) ... [2023-08-26 20:57:27,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193ecf59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:27, skipping insertion in model container [2023-08-26 20:57:27,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:57:27" (1/1) ... [2023-08-26 20:57:27,837 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 20:57:28,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:57:28,072 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 20:57:28,096 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 20:57:28,097 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [253] [2023-08-26 20:57:28,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 20:57:28,147 INFO L206 MainTranslator]: Completed translation [2023-08-26 20:57:28,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28 WrapperNode [2023-08-26 20:57:28,149 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 20:57:28,150 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 20:57:28,150 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 20:57:28,150 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 20:57:28,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,178 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,189 INFO L138 Inliner]: procedures = 169, calls = 15, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 50 [2023-08-26 20:57:28,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 20:57:28,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 20:57:28,190 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 20:57:28,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 20:57:28,196 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,199 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,200 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,215 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,216 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,216 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 20:57:28,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 20:57:28,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 20:57:28,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 20:57:28,222 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (1/1) ... [2023-08-26 20:57:28,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 20:57:28,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 20:57:28,262 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) [2023-08-26 20:57:28,274 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 [2023-08-26 20:57:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-26 20:57:28,296 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-26 20:57:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 20:57:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 20:57:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 20:57:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 20:57:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 20:57:28,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 20:57:28,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 20:57:28,297 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 20:57:28,375 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 20:57:28,377 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 20:57:28,453 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 20:57:28,473 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 20:57:28,474 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 20:57:28,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:57:28 BoogieIcfgContainer [2023-08-26 20:57:28,475 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 20:57:28,477 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 20:57:28,477 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 20:57:28,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 20:57:28,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:57:27" (1/3) ... [2023-08-26 20:57:28,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d03827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:57:28, skipping insertion in model container [2023-08-26 20:57:28,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:57:28" (2/3) ... [2023-08-26 20:57:28,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35d03827 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:57:28, skipping insertion in model container [2023-08-26 20:57:28,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:57:28" (3/3) ... [2023-08-26 20:57:28,481 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2023-08-26 20:57:28,492 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 20:57:28,492 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-26 20:57:28,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 20:57:28,527 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:57:28,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 42 transitions, 89 flow [2023-08-26 20:57:28,588 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2023-08-26 20:57:28,588 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:57:28,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 52 events. 4/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2023-08-26 20:57:28,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 42 places, 42 transitions, 89 flow [2023-08-26 20:57:28,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 42 transitions, 89 flow [2023-08-26 20:57:28,599 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:57:28,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 42 transitions, 89 flow [2023-08-26 20:57:28,617 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 42 transitions, 89 flow [2023-08-26 20:57:28,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 42 places, 42 transitions, 89 flow [2023-08-26 20:57:28,638 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2023-08-26 20:57:28,638 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:57:28,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 52 events. 4/52 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 28. Up to 4 conditions per place. [2023-08-26 20:57:28,639 INFO L119 LiptonReduction]: Number of co-enabled transitions 416 [2023-08-26 20:57:29,549 INFO L134 LiptonReduction]: Checked pairs total: 389 [2023-08-26 20:57:29,550 INFO L136 LiptonReduction]: Total number of compositions: 47 [2023-08-26 20:57:29,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:57:29,563 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;@6dc7ba44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:57:29,563 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-26 20:57:29,566 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:57:29,566 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2023-08-26 20:57:29,566 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:57:29,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:29,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 20:57:29,567 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-26 20:57:29,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:29,570 INFO L85 PathProgramCache]: Analyzing trace with hash 7095322, now seen corresponding path program 1 times [2023-08-26 20:57:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:29,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533613705] [2023-08-26 20:57:29,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:29,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:29,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:57:29,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:29,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533613705] [2023-08-26 20:57:29,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533613705] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:29,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:29,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 20:57:29,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67022558] [2023-08-26 20:57:29,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:29,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 20:57:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:29,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 20:57:29,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 20:57:29,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2023-08-26 20:57:29,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2023-08-26 20:57:29,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:29,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2023-08-26 20:57:29,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:29,738 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-26 20:57:29,738 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 20:57:29,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2023-08-26 20:57:29,739 INFO L140 encePairwiseOnDemand]: 87/89 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2023-08-26 20:57:29,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2023-08-26 20:57:29,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 20:57:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 20:57:29,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 75 transitions. [2023-08-26 20:57:29,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42134831460674155 [2023-08-26 20:57:29,759 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 75 transitions. [2023-08-26 20:57:29,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 75 transitions. [2023-08-26 20:57:29,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:29,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 75 transitions. [2023-08-26 20:57:29,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 37.5) internal successors, (75), 2 states have internal predecessors, (75), 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) [2023-08-26 20:57:29,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2023-08-26 20:57:29,765 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2023-08-26 20:57:29,766 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 75 transitions. [2023-08-26 20:57:29,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2023-08-26 20:57:29,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 20:57:29,769 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2023-08-26 20:57:29,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2023-08-26 20:57:29,772 INFO L281 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2023-08-26 20:57:29,772 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2023-08-26 20:57:29,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 36.0) internal successors, (72), 2 states have internal predecessors, (72), 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) [2023-08-26 20:57:29,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:29,773 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 20:57:29,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 20:57:29,773 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT] === [2023-08-26 20:57:29,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1771352097, now seen corresponding path program 1 times [2023-08-26 20:57:29,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:29,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56848151] [2023-08-26 20:57:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:29,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:29,794 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:57:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:29,815 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:57:29,815 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:57:29,816 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-26 20:57:29,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2023-08-26 20:57:29,818 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2023-08-26 20:57:29,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 20:57:29,818 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 20:57:29,820 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:57:29,820 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 20:57:29,829 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:57:29,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 59 transitions, 130 flow [2023-08-26 20:57:29,840 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-08-26 20:57:29,841 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:57:29,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 7/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 149 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2023-08-26 20:57:29,841 INFO L82 GeneralOperation]: Start removeDead. Operand has 59 places, 59 transitions, 130 flow [2023-08-26 20:57:29,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 59 places, 59 transitions, 130 flow [2023-08-26 20:57:29,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:57:29,842 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 59 transitions, 130 flow [2023-08-26 20:57:29,843 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 59 transitions, 130 flow [2023-08-26 20:57:29,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 59 places, 59 transitions, 130 flow [2023-08-26 20:57:29,851 INFO L124 PetriNetUnfolderBase]: 7/81 cut-off events. [2023-08-26 20:57:29,852 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 20:57:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 81 events. 7/81 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 149 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 53. Up to 6 conditions per place. [2023-08-26 20:57:29,853 INFO L119 LiptonReduction]: Number of co-enabled transitions 1376 [2023-08-26 20:57:30,601 INFO L134 LiptonReduction]: Checked pairs total: 3912 [2023-08-26 20:57:30,601 INFO L136 LiptonReduction]: Total number of compositions: 51 [2023-08-26 20:57:30,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:57:30,603 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;@6dc7ba44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:57:30,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-26 20:57:30,606 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:57:30,606 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-26 20:57:30,606 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:57:30,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:30,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:30,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 20:57:30,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:30,607 INFO L85 PathProgramCache]: Analyzing trace with hash -65485473, now seen corresponding path program 1 times [2023-08-26 20:57:30,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:30,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092117331] [2023-08-26 20:57:30,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:30,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:57:30,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092117331] [2023-08-26 20:57:30,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092117331] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:30,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:30,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:57:30,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139404855] [2023-08-26 20:57:30,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:30,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:30,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:30,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 110 [2023-08-26 20:57:30,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-08-26 20:57:30,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:30,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 110 [2023-08-26 20:57:30,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:30,722 INFO L124 PetriNetUnfolderBase]: 121/254 cut-off events. [2023-08-26 20:57:30,723 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 20:57:30,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 527 conditions, 254 events. 121/254 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1218 event pairs, 79 based on Foata normal form. 8/251 useless extension candidates. Maximal degree in co-relation 214. Up to 183 conditions per place. [2023-08-26 20:57:30,725 INFO L140 encePairwiseOnDemand]: 97/110 looper letters, 24 selfloop transitions, 5 changer transitions 0/32 dead transitions. [2023-08-26 20:57:30,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 32 transitions, 139 flow [2023-08-26 20:57:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:57:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:57:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 150 transitions. [2023-08-26 20:57:30,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2023-08-26 20:57:30,726 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 150 transitions. [2023-08-26 20:57:30,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 150 transitions. [2023-08-26 20:57:30,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:30,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 150 transitions. [2023-08-26 20:57:30,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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) [2023-08-26 20:57:30,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-08-26 20:57:30,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 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) [2023-08-26 20:57:30,729 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 68 flow. Second operand 3 states and 150 transitions. [2023-08-26 20:57:30,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 32 transitions, 139 flow [2023-08-26 20:57:30,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 137 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 20:57:30,730 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 92 flow [2023-08-26 20:57:30,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=110, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-26 20:57:30,731 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2023-08-26 20:57:30,731 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 92 flow [2023-08-26 20:57:30,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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) [2023-08-26 20:57:30,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:30,731 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 20:57:30,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 20:57:30,732 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 20:57:30,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash -784230815, now seen corresponding path program 1 times [2023-08-26 20:57:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:30,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975152226] [2023-08-26 20:57:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:30,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:30,744 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:57:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:30,754 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:57:30,754 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:57:30,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-26 20:57:30,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2023-08-26 20:57:30,754 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2023-08-26 20:57:30,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2023-08-26 20:57:30,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 20:57:30,755 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-26 20:57:30,755 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:57:30,755 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 20:57:30,765 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:57:30,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 76 transitions, 173 flow [2023-08-26 20:57:30,773 INFO L124 PetriNetUnfolderBase]: 10/110 cut-off events. [2023-08-26 20:57:30,773 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:57:30,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 110 events. 10/110 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 222 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 85. Up to 8 conditions per place. [2023-08-26 20:57:30,774 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 76 transitions, 173 flow [2023-08-26 20:57:30,775 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 76 transitions, 173 flow [2023-08-26 20:57:30,775 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:57:30,775 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 76 transitions, 173 flow [2023-08-26 20:57:30,775 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 76 transitions, 173 flow [2023-08-26 20:57:30,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 76 transitions, 173 flow [2023-08-26 20:57:30,782 INFO L124 PetriNetUnfolderBase]: 10/110 cut-off events. [2023-08-26 20:57:30,782 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-26 20:57:30,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 110 events. 10/110 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 222 event pairs, 0 based on Foata normal form. 0/93 useless extension candidates. Maximal degree in co-relation 85. Up to 8 conditions per place. [2023-08-26 20:57:30,802 INFO L119 LiptonReduction]: Number of co-enabled transitions 2880 [2023-08-26 20:57:31,580 INFO L134 LiptonReduction]: Checked pairs total: 8969 [2023-08-26 20:57:31,580 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-26 20:57:31,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:57:31,582 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;@6dc7ba44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:57:31,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-26 20:57:31,587 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:57:31,587 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-08-26 20:57:31,587 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:57:31,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:31,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:31,587 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 20:57:31,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:31,588 INFO L85 PathProgramCache]: Analyzing trace with hash 2113265441, now seen corresponding path program 1 times [2023-08-26 20:57:31,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:31,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593530479] [2023-08-26 20:57:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:31,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:31,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:57:31,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:31,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593530479] [2023-08-26 20:57:31,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593530479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:31,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:31,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:57:31,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52930931] [2023-08-26 20:57:31,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:31,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:31,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:31,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:31,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:31,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 141 [2023-08-26 20:57:31,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 95 flow. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-08-26 20:57:31,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:31,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 141 [2023-08-26 20:57:31,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:31,812 INFO L124 PetriNetUnfolderBase]: 1929/3168 cut-off events. [2023-08-26 20:57:31,812 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-08-26 20:57:31,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6585 conditions, 3168 events. 1929/3168 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20392 event pairs, 1175 based on Foata normal form. 216/3193 useless extension candidates. Maximal degree in co-relation 974. Up to 2115 conditions per place. [2023-08-26 20:57:31,830 INFO L140 encePairwiseOnDemand]: 123/141 looper letters, 36 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2023-08-26 20:57:31,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 211 flow [2023-08-26 20:57:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:57:31,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:57:31,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 189 transitions. [2023-08-26 20:57:31,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44680851063829785 [2023-08-26 20:57:31,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 189 transitions. [2023-08-26 20:57:31,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 189 transitions. [2023-08-26 20:57:31,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:31,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 189 transitions. [2023-08-26 20:57:31,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 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) [2023-08-26 20:57:31,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-26 20:57:31,834 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-26 20:57:31,835 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 95 flow. Second operand 3 states and 189 transitions. [2023-08-26 20:57:31,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 211 flow [2023-08-26 20:57:31,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 46 transitions, 203 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-26 20:57:31,837 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 133 flow [2023-08-26 20:57:31,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-08-26 20:57:31,838 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, 0 predicate places. [2023-08-26 20:57:31,838 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 133 flow [2023-08-26 20:57:31,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 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) [2023-08-26 20:57:31,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:31,838 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:31,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 20:57:31,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 20:57:31,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:31,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1631512016, now seen corresponding path program 1 times [2023-08-26 20:57:31,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:31,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426803561] [2023-08-26 20:57:31,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:31,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:31,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:57:31,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:31,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426803561] [2023-08-26 20:57:31,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426803561] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:31,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:31,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:57:31,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841286861] [2023-08-26 20:57:31,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:31,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:31,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:31,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:31,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 141 [2023-08-26 20:57:31,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 133 flow. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2023-08-26 20:57:31,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:31,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 141 [2023-08-26 20:57:31,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:31,933 INFO L124 PetriNetUnfolderBase]: 49/233 cut-off events. [2023-08-26 20:57:31,934 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2023-08-26 20:57:31,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1156 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 311. Up to 58 conditions per place. [2023-08-26 20:57:31,935 INFO L140 encePairwiseOnDemand]: 135/141 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-26 20:57:31,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 133 flow [2023-08-26 20:57:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:57:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:57:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2023-08-26 20:57:31,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4302600472813239 [2023-08-26 20:57:31,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 182 transitions. [2023-08-26 20:57:31,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 182 transitions. [2023-08-26 20:57:31,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:31,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 182 transitions. [2023-08-26 20:57:31,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 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) [2023-08-26 20:57:31,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-26 20:57:31,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2023-08-26 20:57:31,938 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 133 flow. Second operand 3 states and 182 transitions. [2023-08-26 20:57:31,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 133 flow [2023-08-26 20:57:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 20:57:31,940 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 73 flow [2023-08-26 20:57:31,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-26 20:57:31,941 INFO L281 CegarLoopForPetriNet]: 39 programPoint places, -7 predicate places. [2023-08-26 20:57:31,941 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 73 flow [2023-08-26 20:57:31,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 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) [2023-08-26 20:57:31,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:31,941 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 20:57:31,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 20:57:31,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-26 20:57:31,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:31,942 INFO L85 PathProgramCache]: Analyzing trace with hash -381272929, now seen corresponding path program 1 times [2023-08-26 20:57:31,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091360950] [2023-08-26 20:57:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:31,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:31,951 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:57:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:31,960 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:57:31,961 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:57:31,961 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-26 20:57:31,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2023-08-26 20:57:31,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2023-08-26 20:57:31,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2023-08-26 20:57:31,961 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2023-08-26 20:57:31,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 20:57:31,961 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 20:57:31,962 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:57:31,962 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 20:57:31,976 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:57:31,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 218 flow [2023-08-26 20:57:31,986 INFO L124 PetriNetUnfolderBase]: 13/139 cut-off events. [2023-08-26 20:57:31,987 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 20:57:31,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 139 events. 13/139 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 288 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 118. Up to 10 conditions per place. [2023-08-26 20:57:31,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 93 places, 93 transitions, 218 flow [2023-08-26 20:57:32,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 93 places, 93 transitions, 218 flow [2023-08-26 20:57:32,004 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:57:32,004 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 93 places, 93 transitions, 218 flow [2023-08-26 20:57:32,005 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 93 places, 93 transitions, 218 flow [2023-08-26 20:57:32,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 93 places, 93 transitions, 218 flow [2023-08-26 20:57:32,012 INFO L124 PetriNetUnfolderBase]: 13/139 cut-off events. [2023-08-26 20:57:32,012 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-26 20:57:32,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 139 events. 13/139 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 288 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 118. Up to 10 conditions per place. [2023-08-26 20:57:32,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 4928 [2023-08-26 20:57:32,779 INFO L134 LiptonReduction]: Checked pairs total: 16580 [2023-08-26 20:57:32,779 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-26 20:57:32,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:57:32,781 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;@6dc7ba44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:57:32,781 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-08-26 20:57:32,783 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:57:32,783 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-08-26 20:57:32,783 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:57:32,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:32,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:32,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:57:32,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1839004747, now seen corresponding path program 1 times [2023-08-26 20:57:32,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:32,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89220786] [2023-08-26 20:57:32,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:32,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:32,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:57:32,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89220786] [2023-08-26 20:57:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89220786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:32,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:32,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:57:32,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659114452] [2023-08-26 20:57:32,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:32,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:32,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:32,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:32,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:32,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 170 [2023-08-26 20:57:32,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2023-08-26 20:57:32,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:32,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 170 [2023-08-26 20:57:32,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:34,911 INFO L124 PetriNetUnfolderBase]: 27259/39744 cut-off events. [2023-08-26 20:57:34,911 INFO L125 PetriNetUnfolderBase]: For 7489/7489 co-relation queries the response was YES. [2023-08-26 20:57:34,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82771 conditions, 39744 events. 27259/39744 cut-off events. For 7489/7489 co-relation queries the response was YES. Maximal size of possible extension queue 2470. Compared 295641 event pairs, 16292 based on Foata normal form. 4788/41256 useless extension candidates. Maximal degree in co-relation 7152. Up to 24700 conditions per place. [2023-08-26 20:57:35,134 INFO L140 encePairwiseOnDemand]: 144/170 looper letters, 49 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2023-08-26 20:57:35,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 291 flow [2023-08-26 20:57:35,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:57:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:57:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 234 transitions. [2023-08-26 20:57:35,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2023-08-26 20:57:35,136 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 234 transitions. [2023-08-26 20:57:35,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 234 transitions. [2023-08-26 20:57:35,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:35,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 234 transitions. [2023-08-26 20:57:35,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 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) [2023-08-26 20:57:35,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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) [2023-08-26 20:57:35,138 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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) [2023-08-26 20:57:35,138 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 132 flow. Second operand 3 states and 234 transitions. [2023-08-26 20:57:35,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 291 flow [2023-08-26 20:57:35,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 273 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-08-26 20:57:35,144 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 178 flow [2023-08-26 20:57:35,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-26 20:57:35,145 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -1 predicate places. [2023-08-26 20:57:35,145 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 178 flow [2023-08-26 20:57:35,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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) [2023-08-26 20:57:35,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:35,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 20:57:35,145 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:57:35,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:35,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1579689684, now seen corresponding path program 1 times [2023-08-26 20:57:35,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:35,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856532351] [2023-08-26 20:57:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:35,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:57:35,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:35,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856532351] [2023-08-26 20:57:35,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856532351] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:35,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:35,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:57:35,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078928966] [2023-08-26 20:57:35,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:35,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:35,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:35,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:35,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:35,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 170 [2023-08-26 20:57:35,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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) [2023-08-26 20:57:35,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:35,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 170 [2023-08-26 20:57:35,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:35,238 INFO L124 PetriNetUnfolderBase]: 149/641 cut-off events. [2023-08-26 20:57:35,238 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2023-08-26 20:57:35,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4225 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 879. Up to 164 conditions per place. [2023-08-26 20:57:35,240 INFO L140 encePairwiseOnDemand]: 162/170 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2023-08-26 20:57:35,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2023-08-26 20:57:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:57:35,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:57:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 220 transitions. [2023-08-26 20:57:35,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2023-08-26 20:57:35,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 220 transitions. [2023-08-26 20:57:35,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 220 transitions. [2023-08-26 20:57:35,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:35,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 220 transitions. [2023-08-26 20:57:35,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 73.33333333333333) internal successors, (220), 3 states have internal predecessors, (220), 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) [2023-08-26 20:57:35,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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) [2023-08-26 20:57:35,243 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 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) [2023-08-26 20:57:35,243 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 178 flow. Second operand 3 states and 220 transitions. [2023-08-26 20:57:35,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2023-08-26 20:57:35,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 20:57:35,245 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 94 flow [2023-08-26 20:57:35,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2023-08-26 20:57:35,246 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -11 predicate places. [2023-08-26 20:57:35,246 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 94 flow [2023-08-26 20:57:35,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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) [2023-08-26 20:57:35,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:35,247 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:35,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 20:57:35,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 3 more)] === [2023-08-26 20:57:35,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1838822728, now seen corresponding path program 1 times [2023-08-26 20:57:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:35,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915553031] [2023-08-26 20:57:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:35,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:35,258 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:57:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:35,265 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:57:35,265 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:57:35,265 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-08-26 20:57:35,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2023-08-26 20:57:35,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2023-08-26 20:57:35,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 6 remaining) [2023-08-26 20:57:35,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2023-08-26 20:57:35,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2023-08-26 20:57:35,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 20:57:35,266 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 20:57:35,267 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:57:35,267 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-26 20:57:35,283 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:57:35,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 110 transitions, 265 flow [2023-08-26 20:57:35,294 INFO L124 PetriNetUnfolderBase]: 16/168 cut-off events. [2023-08-26 20:57:35,294 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 20:57:35,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 168 events. 16/168 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 361 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 152. Up to 12 conditions per place. [2023-08-26 20:57:35,295 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 110 transitions, 265 flow [2023-08-26 20:57:35,295 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 110 transitions, 265 flow [2023-08-26 20:57:35,296 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:57:35,296 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 110 transitions, 265 flow [2023-08-26 20:57:35,296 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 110 transitions, 265 flow [2023-08-26 20:57:35,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 110 transitions, 265 flow [2023-08-26 20:57:35,305 INFO L124 PetriNetUnfolderBase]: 16/168 cut-off events. [2023-08-26 20:57:35,305 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-08-26 20:57:35,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 168 events. 16/168 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 361 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 152. Up to 12 conditions per place. [2023-08-26 20:57:35,309 INFO L119 LiptonReduction]: Number of co-enabled transitions 7520 [2023-08-26 20:57:36,304 INFO L134 LiptonReduction]: Checked pairs total: 25082 [2023-08-26 20:57:36,304 INFO L136 LiptonReduction]: Total number of compositions: 94 [2023-08-26 20:57:36,305 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:57:36,305 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;@6dc7ba44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:57:36,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 20:57:36,306 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:57:36,306 INFO L124 PetriNetUnfolderBase]: 1/15 cut-off events. [2023-08-26 20:57:36,306 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:57:36,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:36,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:36,307 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 4 more)] === [2023-08-26 20:57:36,307 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:36,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1304318530, now seen corresponding path program 1 times [2023-08-26 20:57:36,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:36,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596984192] [2023-08-26 20:57:36,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:36,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:57:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:36,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596984192] [2023-08-26 20:57:36,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596984192] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:36,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:36,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:57:36,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766983973] [2023-08-26 20:57:36,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:36,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:36,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 204 [2023-08-26 20:57:36,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-08-26 20:57:36,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:36,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 204 [2023-08-26 20:57:36,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:54,685 INFO L124 PetriNetUnfolderBase]: 256899/344303 cut-off events. [2023-08-26 20:57:54,685 INFO L125 PetriNetUnfolderBase]: For 85245/85245 co-relation queries the response was YES. [2023-08-26 20:57:55,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719315 conditions, 344303 events. 256899/344303 cut-off events. For 85245/85245 co-relation queries the response was YES. Maximal size of possible extension queue 15394. Compared 2609734 event pairs, 148299 based on Foata normal form. 26548/343642 useless extension candidates. Maximal degree in co-relation 75935. Up to 203429 conditions per place. [2023-08-26 20:57:56,644 INFO L140 encePairwiseOnDemand]: 176/204 looper letters, 59 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2023-08-26 20:57:56,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 363 flow [2023-08-26 20:57:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:57:56,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:57:56,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 20:57:56,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362745098039216 [2023-08-26 20:57:56,645 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 20:57:56,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 20:57:56,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:56,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 20:57:56,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 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) [2023-08-26 20:57:56,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-08-26 20:57:56,647 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-08-26 20:57:56,647 INFO L175 Difference]: Start difference. First operand has 60 places, 57 transitions, 159 flow. Second operand 3 states and 267 transitions. [2023-08-26 20:57:56,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 363 flow [2023-08-26 20:57:56,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 331 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-26 20:57:56,702 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 211 flow [2023-08-26 20:57:56,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2023-08-26 20:57:56,703 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2023-08-26 20:57:56,703 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 211 flow [2023-08-26 20:57:56,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 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) [2023-08-26 20:57:56,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:56,703 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:56,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 20:57:56,703 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 4 more)] === [2023-08-26 20:57:56,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash 937634288, now seen corresponding path program 1 times [2023-08-26 20:57:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:56,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854099575] [2023-08-26 20:57:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 20:57:56,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:56,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854099575] [2023-08-26 20:57:56,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854099575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:56,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:56,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 20:57:56,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486307572] [2023-08-26 20:57:56,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:56,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:56,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:56,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:56,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 204 [2023-08-26 20:57:56,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2023-08-26 20:57:56,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:56,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 204 [2023-08-26 20:57:56,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 20:57:56,822 INFO L124 PetriNetUnfolderBase]: 405/1641 cut-off events. [2023-08-26 20:57:56,822 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-08-26 20:57:56,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13496 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 2227. Up to 436 conditions per place. [2023-08-26 20:57:56,826 INFO L140 encePairwiseOnDemand]: 194/204 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2023-08-26 20:57:56,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 213 flow [2023-08-26 20:57:56,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 20:57:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 20:57:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-26 20:57:56,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4215686274509804 [2023-08-26 20:57:56,828 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-26 20:57:56,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-26 20:57:56,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 20:57:56,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-26 20:57:56,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 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) [2023-08-26 20:57:56,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-08-26 20:57:56,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 204.0) internal successors, (816), 4 states have internal predecessors, (816), 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) [2023-08-26 20:57:56,830 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 211 flow. Second operand 3 states and 258 transitions. [2023-08-26 20:57:56,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 213 flow [2023-08-26 20:57:56,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 20:57:56,834 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 115 flow [2023-08-26 20:57:56,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=204, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2023-08-26 20:57:56,835 INFO L281 CegarLoopForPetriNet]: 60 programPoint places, -12 predicate places. [2023-08-26 20:57:56,835 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 115 flow [2023-08-26 20:57:56,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 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) [2023-08-26 20:57:56,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:56,836 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:56,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 20:57:56,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 4 more)] === [2023-08-26 20:57:56,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:56,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1180759037, now seen corresponding path program 1 times [2023-08-26 20:57:56,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:56,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383234202] [2023-08-26 20:57:56,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:56,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:56,849 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 20:57:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 20:57:56,863 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 20:57:56,863 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 20:57:56,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-08-26 20:57:56,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2023-08-26 20:57:56,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (4 of 7 remaining) [2023-08-26 20:57:56,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (3 of 7 remaining) [2023-08-26 20:57:56,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2023-08-26 20:57:56,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2023-08-26 20:57:56,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2023-08-26 20:57:56,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 20:57:56,864 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-26 20:57:56,864 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 20:57:56,864 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-26 20:57:56,883 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 20:57:56,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 127 transitions, 314 flow [2023-08-26 20:57:56,897 INFO L124 PetriNetUnfolderBase]: 19/197 cut-off events. [2023-08-26 20:57:56,898 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 20:57:56,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 197 events. 19/197 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 436 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 189. Up to 14 conditions per place. [2023-08-26 20:57:56,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 127 transitions, 314 flow [2023-08-26 20:57:56,899 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 127 transitions, 314 flow [2023-08-26 20:57:56,899 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 20:57:56,900 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 127 transitions, 314 flow [2023-08-26 20:57:56,900 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 127 transitions, 314 flow [2023-08-26 20:57:56,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 127 transitions, 314 flow [2023-08-26 20:57:56,908 INFO L124 PetriNetUnfolderBase]: 19/197 cut-off events. [2023-08-26 20:57:56,908 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 20:57:56,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 197 events. 19/197 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 436 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 189. Up to 14 conditions per place. [2023-08-26 20:57:56,913 INFO L119 LiptonReduction]: Number of co-enabled transitions 10656 [2023-08-26 20:57:58,130 INFO L134 LiptonReduction]: Checked pairs total: 37082 [2023-08-26 20:57:58,130 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-26 20:57:58,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 20:57:58,132 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;@6dc7ba44, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 20:57:58,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-26 20:57:58,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 20:57:58,133 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-08-26 20:57:58,133 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 20:57:58,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 20:57:58,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 20:57:58,133 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONASSERT === [thr1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONASSERT (and 5 more)] === [2023-08-26 20:57:58,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 20:57:58,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2013448462, now seen corresponding path program 1 times [2023-08-26 20:57:58,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 20:57:58,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986234695] [2023-08-26 20:57:58,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 20:57:58,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 20:57:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 20:57:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 20:57:58,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 20:57:58,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986234695] [2023-08-26 20:57:58,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986234695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 20:57:58,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 20:57:58,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 20:57:58,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601293471] [2023-08-26 20:57:58,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 20:57:58,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 20:57:58,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 20:57:58,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 20:57:58,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 20:57:58,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 237 [2023-08-26 20:57:58,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 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) [2023-08-26 20:57:58,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 20:57:58,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 237 [2023-08-26 20:57:58,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand