/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:38:46,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:38:46,240 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-SemanticLbe.epf [2023-11-17 15:38:46,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:38:46,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:38:46,264 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:38:46,265 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:38:46,265 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:38:46,265 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:38:46,266 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:38:46,266 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:38:46,266 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:38:46,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:38:46,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:38:46,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:38:46,268 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:38:46,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:38:46,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:38:46,269 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:38:46,269 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:38:46,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:38:46,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:38:46,270 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:38:46,270 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:38:46,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:38:46,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:38:46,271 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:38:46,271 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:38:46,271 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:38:46,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:38:46,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:38:46,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:38:46,272 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:38:46,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:38:46,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:38:46,484 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:38:46,485 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:38:46,486 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:38:46,487 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-11-17 15:38:47,664 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:38:47,950 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:38:47,957 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-11-17 15:38:47,973 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f77eed0/6017416bef474cf589cf242868c6409d/FLAG91181fd5d [2023-11-17 15:38:47,990 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c2f77eed0/6017416bef474cf589cf242868c6409d [2023-11-17 15:38:47,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:38:47,993 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:38:47,994 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:38:47,994 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:38:47,998 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:38:47,999 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:47" (1/1) ... [2023-11-17 15:38:48,000 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@567f5d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:47, skipping insertion in model container [2023-11-17 15:38:48,000 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:38:47" (1/1) ... [2023-11-17 15:38:48,037 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:38:48,385 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2023-11-17 15:38:48,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:38:48,425 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:38:48,467 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2023-11-17 15:38:48,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:38:48,526 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:38:48,528 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48 WrapperNode [2023-11-17 15:38:48,528 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:38:48,529 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:38:48,529 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:38:48,529 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:38:48,536 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,550 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,573 INFO L138 Inliner]: procedures = 171, calls = 43, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 168 [2023-11-17 15:38:48,573 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:38:48,574 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:38:48,574 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:38:48,574 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:38:48,583 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,590 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,590 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,598 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,602 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,610 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,611 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,614 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:38:48,614 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:38:48,615 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:38:48,615 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:38:48,615 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (1/1) ... [2023-11-17 15:38:48,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:38:48,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:38:48,656 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) [2023-11-17 15:38:48,686 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 [2023-11-17 15:38:48,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:38:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:38:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:38:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:38:48,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:38:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:38:48,695 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:38:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:38:48,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:38:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:38:48,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:38:48,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:38:48,697 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:38:48,820 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:38:48,822 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:38:49,109 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:38:49,147 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:38:49,148 INFO L307 CfgBuilder]: Removed 18 assume(true) statements. [2023-11-17 15:38:49,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:38:49 BoogieIcfgContainer [2023-11-17 15:38:49,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:38:49,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:38:49,152 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:38:49,155 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:38:49,155 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:38:47" (1/3) ... [2023-11-17 15:38:49,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66536af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:49, skipping insertion in model container [2023-11-17 15:38:49,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:38:48" (2/3) ... [2023-11-17 15:38:49,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66536af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:38:49, skipping insertion in model container [2023-11-17 15:38:49,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:38:49" (3/3) ... [2023-11-17 15:38:49,157 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-11-17 15:38:49,174 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:38:49,175 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-17 15:38:49,175 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:38:49,222 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:38:49,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 153 transitions, 313 flow [2023-11-17 15:38:49,313 INFO L124 PetriNetUnfolderBase]: 33/217 cut-off events. [2023-11-17 15:38:49,314 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:38:49,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222 conditions, 217 events. 33/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 770 event pairs, 0 based on Foata normal form. 0/178 useless extension candidates. Maximal degree in co-relation 121. Up to 6 conditions per place. [2023-11-17 15:38:49,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 153 transitions, 313 flow [2023-11-17 15:38:49,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 148 transitions, 300 flow [2023-11-17 15:38:49,328 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:49,339 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 148 transitions, 300 flow [2023-11-17 15:38:49,342 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 148 transitions, 300 flow [2023-11-17 15:38:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 148 transitions, 300 flow [2023-11-17 15:38:49,375 INFO L124 PetriNetUnfolderBase]: 32/212 cut-off events. [2023-11-17 15:38:49,375 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:49,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 212 events. 32/212 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 755 event pairs, 0 based on Foata normal form. 0/173 useless extension candidates. Maximal degree in co-relation 121. Up to 6 conditions per place. [2023-11-17 15:38:49,381 INFO L119 LiptonReduction]: Number of co-enabled transitions 7280 [2023-11-17 15:38:52,108 INFO L134 LiptonReduction]: Checked pairs total: 16163 [2023-11-17 15:38:52,108 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-11-17 15:38:52,123 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:52,128 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=LoopHeads, 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;@2eb8bcb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:52,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 15:38:52,132 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:52,132 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 15:38:52,132 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:52,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:52,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:38:52,134 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:38:52,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:52,138 INFO L85 PathProgramCache]: Analyzing trace with hash 646560515, now seen corresponding path program 1 times [2023-11-17 15:38:52,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:52,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764818328] [2023-11-17 15:38:52,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:52,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:52,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:52,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764818328] [2023-11-17 15:38:52,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764818328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:52,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:52,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:52,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169573381] [2023-11-17 15:38:52,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:52,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:52,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:52,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:52,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:52,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 287 [2023-11-17 15:38:52,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 58 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2023-11-17 15:38:52,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:52,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 287 [2023-11-17 15:38:52,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:52,572 INFO L124 PetriNetUnfolderBase]: 307/685 cut-off events. [2023-11-17 15:38:52,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:52,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1322 conditions, 685 events. 307/685 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 3252 event pairs, 0 based on Foata normal form. 53/649 useless extension candidates. Maximal degree in co-relation 1294. Up to 613 conditions per place. [2023-11-17 15:38:52,578 INFO L140 encePairwiseOnDemand]: 268/287 looper letters, 53 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-11-17 15:38:52,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 60 transitions, 234 flow [2023-11-17 15:38:52,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:38:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:38:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 389 transitions. [2023-11-17 15:38:52,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518002322880372 [2023-11-17 15:38:52,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 389 transitions. [2023-11-17 15:38:52,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 389 transitions. [2023-11-17 15:38:52,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:52,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 389 transitions. [2023-11-17 15:38:52,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 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) [2023-11-17 15:38:52,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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) [2023-11-17 15:38:52,609 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 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) [2023-11-17 15:38:52,611 INFO L175 Difference]: Start difference. First operand has 44 places, 58 transitions, 120 flow. Second operand 3 states and 389 transitions. [2023-11-17 15:38:52,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 60 transitions, 234 flow [2023-11-17 15:38:52,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 60 transitions, 234 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:38:52,617 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 96 flow [2023-11-17 15:38:52,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-11-17 15:38:52,623 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:38:52,623 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 96 flow [2023-11-17 15:38:52,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 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) [2023-11-17 15:38:52,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:52,624 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:38:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:38:52,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-17 15:38:52,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:52,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1432324219, now seen corresponding path program 1 times [2023-11-17 15:38:52,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:52,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870544260] [2023-11-17 15:38:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:52,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:52,658 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:38:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:52,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:38:52,704 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:38:52,706 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-17 15:38:52,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-17 15:38:52,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-17 15:38:52,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-17 15:38:52,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:38:52,712 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:38:52,715 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:38:52,715 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:38:52,750 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:38:52,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 207 transitions, 430 flow [2023-11-17 15:38:52,800 INFO L124 PetriNetUnfolderBase]: 57/361 cut-off events. [2023-11-17 15:38:52,800 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:38:52,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 57/361 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1479 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-11-17 15:38:52,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 207 transitions, 430 flow [2023-11-17 15:38:52,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 207 transitions, 430 flow [2023-11-17 15:38:52,809 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:52,810 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 179 places, 207 transitions, 430 flow [2023-11-17 15:38:52,810 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 179 places, 207 transitions, 430 flow [2023-11-17 15:38:52,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 207 transitions, 430 flow [2023-11-17 15:38:52,850 INFO L124 PetriNetUnfolderBase]: 57/361 cut-off events. [2023-11-17 15:38:52,850 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:38:52,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 361 events. 57/361 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1479 event pairs, 0 based on Foata normal form. 0/295 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-11-17 15:38:52,867 INFO L119 LiptonReduction]: Number of co-enabled transitions 21112 [2023-11-17 15:38:56,043 INFO L134 LiptonReduction]: Checked pairs total: 51281 [2023-11-17 15:38:56,044 INFO L136 LiptonReduction]: Total number of compositions: 180 [2023-11-17 15:38:56,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:38:56,047 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=LoopHeads, 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;@2eb8bcb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:38:56,047 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 15:38:56,050 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:38:56,050 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-11-17 15:38:56,050 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:38:56,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:56,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:38:56,051 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:56,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:56,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1067013955, now seen corresponding path program 1 times [2023-11-17 15:38:56,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:56,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015454462] [2023-11-17 15:38:56,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:56,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:56,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:56,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015454462] [2023-11-17 15:38:56,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015454462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:56,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:56,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:38:56,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088893651] [2023-11-17 15:38:56,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:56,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:56,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:56,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:56,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 387 [2023-11-17 15:38:56,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 93 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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) [2023-11-17 15:38:56,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:56,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 387 [2023-11-17 15:38:56,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:57,422 INFO L124 PetriNetUnfolderBase]: 9820/15542 cut-off events. [2023-11-17 15:38:57,422 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-11-17 15:38:57,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30666 conditions, 15542 events. 9820/15542 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 100402 event pairs, 4384 based on Foata normal form. 1172/14918 useless extension candidates. Maximal degree in co-relation 2590. Up to 15022 conditions per place. [2023-11-17 15:38:57,522 INFO L140 encePairwiseOnDemand]: 358/387 looper letters, 71 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-11-17 15:38:57,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 84 transitions, 330 flow [2023-11-17 15:38:57,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:38:57,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:38:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-11-17 15:38:57,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4453057708871662 [2023-11-17 15:38:57,527 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-11-17 15:38:57,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-11-17 15:38:57,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:57,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-11-17 15:38:57,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 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) [2023-11-17 15:38:57,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 387.0) internal successors, (1548), 4 states have internal predecessors, (1548), 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) [2023-11-17 15:38:57,534 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 387.0) internal successors, (1548), 4 states have internal predecessors, (1548), 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) [2023-11-17 15:38:57,534 INFO L175 Difference]: Start difference. First operand has 68 places, 93 transitions, 202 flow. Second operand 3 states and 517 transitions. [2023-11-17 15:38:57,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 84 transitions, 330 flow [2023-11-17 15:38:57,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 84 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:38:57,538 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 162 flow [2023-11-17 15:38:57,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=387, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2023-11-17 15:38:57,539 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-11-17 15:38:57,539 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 162 flow [2023-11-17 15:38:57,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 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) [2023-11-17 15:38:57,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:57,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:38:57,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:38:57,541 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:57,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:57,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1534729987, now seen corresponding path program 1 times [2023-11-17 15:38:57,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:57,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282719583] [2023-11-17 15:38:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:57,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:38:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:38:57,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:38:57,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282719583] [2023-11-17 15:38:57,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282719583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:38:57,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:38:57,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:38:57,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044268423] [2023-11-17 15:38:57,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:38:57,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:38:57,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:38:57,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:38:57,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:38:57,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 387 [2023-11-17 15:38:57,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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) [2023-11-17 15:38:57,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:38:57,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 387 [2023-11-17 15:38:57,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:38:59,154 INFO L124 PetriNetUnfolderBase]: 12451/20060 cut-off events. [2023-11-17 15:38:59,154 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2023-11-17 15:38:59,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40071 conditions, 20060 events. 12451/20060 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 134640 event pairs, 5452 based on Foata normal form. 0/18331 useless extension candidates. Maximal degree in co-relation 40015. Up to 11156 conditions per place. [2023-11-17 15:38:59,268 INFO L140 encePairwiseOnDemand]: 372/387 looper letters, 97 selfloop transitions, 10 changer transitions 0/114 dead transitions. [2023-11-17 15:38:59,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 474 flow [2023-11-17 15:38:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:38:59,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:38:59,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2023-11-17 15:38:59,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2023-11-17 15:38:59,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 486 transitions. [2023-11-17 15:38:59,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 486 transitions. [2023-11-17 15:38:59,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:38:59,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 486 transitions. [2023-11-17 15:38:59,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 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) [2023-11-17 15:38:59,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 387.0) internal successors, (1548), 4 states have internal predecessors, (1548), 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) [2023-11-17 15:38:59,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 387.0) internal successors, (1548), 4 states have internal predecessors, (1548), 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) [2023-11-17 15:38:59,276 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 162 flow. Second operand 3 states and 486 transitions. [2023-11-17 15:38:59,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 474 flow [2023-11-17 15:38:59,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 114 transitions, 472 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:38:59,283 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 242 flow [2023-11-17 15:38:59,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=387, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-11-17 15:38:59,284 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-11-17 15:38:59,284 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 242 flow [2023-11-17 15:38:59,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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) [2023-11-17 15:38:59,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:38:59,285 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:38:59,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:38:59,286 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-17 15:38:59,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:38:59,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1031066531, now seen corresponding path program 1 times [2023-11-17 15:38:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:38:59,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065530876] [2023-11-17 15:38:59,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:38:59,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:38:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:59,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:38:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:38:59,341 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:38:59,341 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:38:59,341 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-17 15:38:59,341 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-17 15:38:59,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-17 15:38:59,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-17 15:38:59,342 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-17 15:38:59,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:38:59,342 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:38:59,343 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:38:59,343 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:38:59,369 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:38:59,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 261 transitions, 549 flow [2023-11-17 15:38:59,449 INFO L124 PetriNetUnfolderBase]: 86/540 cut-off events. [2023-11-17 15:38:59,450 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:38:59,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 540 events. 86/540 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2308 event pairs, 1 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 369. Up to 16 conditions per place. [2023-11-17 15:38:59,457 INFO L82 GeneralOperation]: Start removeDead. Operand has 224 places, 261 transitions, 549 flow [2023-11-17 15:38:59,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 224 places, 261 transitions, 549 flow [2023-11-17 15:38:59,463 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:38:59,463 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 261 transitions, 549 flow [2023-11-17 15:38:59,463 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 261 transitions, 549 flow [2023-11-17 15:38:59,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 261 transitions, 549 flow [2023-11-17 15:38:59,528 INFO L124 PetriNetUnfolderBase]: 86/540 cut-off events. [2023-11-17 15:38:59,529 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:38:59,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 540 events. 86/540 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2308 event pairs, 1 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 369. Up to 16 conditions per place. [2023-11-17 15:38:59,559 INFO L119 LiptonReduction]: Number of co-enabled transitions 40248 [2023-11-17 15:39:03,555 INFO L134 LiptonReduction]: Checked pairs total: 96215 [2023-11-17 15:39:03,556 INFO L136 LiptonReduction]: Total number of compositions: 235 [2023-11-17 15:39:03,563 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:39:03,567 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=LoopHeads, 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;@2eb8bcb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:39:03,567 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-17 15:39:03,569 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:39:03,570 INFO L124 PetriNetUnfolderBase]: 5/21 cut-off events. [2023-11-17 15:39:03,570 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:39:03,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:03,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:39:03,570 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:39:03,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1591300449, now seen corresponding path program 1 times [2023-11-17 15:39:03,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:03,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144163894] [2023-11-17 15:39:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:03,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:03,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144163894] [2023-11-17 15:39:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144163894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:03,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:03,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:39:03,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975279013] [2023-11-17 15:39:03,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:03,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:03,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 496 [2023-11-17 15:39:03,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 123 transitions, 273 flow. Second operand has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:03,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:03,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 496 [2023-11-17 15:39:03,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:39:24,525 INFO L124 PetriNetUnfolderBase]: 245496/343192 cut-off events. [2023-11-17 15:39:24,525 INFO L125 PetriNetUnfolderBase]: For 2869/2869 co-relation queries the response was YES. [2023-11-17 15:39:25,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676486 conditions, 343192 events. 245496/343192 cut-off events. For 2869/2869 co-relation queries the response was YES. Maximal size of possible extension queue 6196. Compared 2591589 event pairs, 150601 based on Foata normal form. 24547/320787 useless extension candidates. Maximal degree in co-relation 31220. Up to 331296 conditions per place. [2023-11-17 15:39:26,371 INFO L140 encePairwiseOnDemand]: 458/496 looper letters, 90 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-11-17 15:39:26,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 106 transitions, 423 flow [2023-11-17 15:39:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:39:26,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:39:26,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 644 transitions. [2023-11-17 15:39:26,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4327956989247312 [2023-11-17 15:39:26,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 644 transitions. [2023-11-17 15:39:26,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 644 transitions. [2023-11-17 15:39:26,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:39:26,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 644 transitions. [2023-11-17 15:39:26,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 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) [2023-11-17 15:39:26,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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) [2023-11-17 15:39:26,380 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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) [2023-11-17 15:39:26,380 INFO L175 Difference]: Start difference. First operand has 89 places, 123 transitions, 273 flow. Second operand 3 states and 644 transitions. [2023-11-17 15:39:26,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 106 transitions, 423 flow [2023-11-17 15:39:26,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 106 transitions, 423 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:39:26,388 INFO L231 Difference]: Finished difference. Result has 92 places, 89 transitions, 215 flow [2023-11-17 15:39:26,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=92, PETRI_TRANSITIONS=89} [2023-11-17 15:39:26,389 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 3 predicate places. [2023-11-17 15:39:26,389 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 89 transitions, 215 flow [2023-11-17 15:39:26,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:39:26,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:39:26,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:39:26,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 15:39:26,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:39:26,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:39:26,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1355673351, now seen corresponding path program 1 times [2023-11-17 15:39:26,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:39:26,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543793800] [2023-11-17 15:39:26,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:39:26,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:39:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:39:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:39:26,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:39:26,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543793800] [2023-11-17 15:39:26,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543793800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:39:26,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:39:26,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:39:26,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085422403] [2023-11-17 15:39:26,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:39:26,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:39:26,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:39:26,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:39:26,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:39:26,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 496 [2023-11-17 15:39:26,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 89 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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) [2023-11-17 15:39:26,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:39:26,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 496 [2023-11-17 15:39:26,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:40:01,132 INFO L124 PetriNetUnfolderBase]: 375577/523769 cut-off events. [2023-11-17 15:40:01,133 INFO L125 PetriNetUnfolderBase]: For 4566/4566 co-relation queries the response was YES. [2023-11-17 15:40:02,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1045677 conditions, 523769 events. 375577/523769 cut-off events. For 4566/4566 co-relation queries the response was YES. Maximal size of possible extension queue 8671. Compared 4054227 event pairs, 161322 based on Foata normal form. 0/481478 useless extension candidates. Maximal degree in co-relation 1045620. Up to 284947 conditions per place. [2023-11-17 15:40:03,938 INFO L140 encePairwiseOnDemand]: 473/496 looper letters, 128 selfloop transitions, 16 changer transitions 0/152 dead transitions. [2023-11-17 15:40:03,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 152 transitions, 638 flow [2023-11-17 15:40:03,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:40:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:40:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2023-11-17 15:40:03,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40524193548387094 [2023-11-17 15:40:03,940 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2023-11-17 15:40:03,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2023-11-17 15:40:03,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:40:03,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2023-11-17 15:40:03,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 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) [2023-11-17 15:40:03,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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) [2023-11-17 15:40:03,948 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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) [2023-11-17 15:40:03,948 INFO L175 Difference]: Start difference. First operand has 92 places, 89 transitions, 215 flow. Second operand 3 states and 603 transitions. [2023-11-17 15:40:03,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 152 transitions, 638 flow [2023-11-17 15:40:03,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 152 transitions, 636 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:40:03,961 INFO L231 Difference]: Finished difference. Result has 95 places, 103 transitions, 347 flow [2023-11-17 15:40:03,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=347, PETRI_PLACES=95, PETRI_TRANSITIONS=103} [2023-11-17 15:40:03,962 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, 6 predicate places. [2023-11-17 15:40:03,962 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 103 transitions, 347 flow [2023-11-17 15:40:03,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 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) [2023-11-17 15:40:03,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:03,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:40:03,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:40:03,963 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:40:03,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:03,963 INFO L85 PathProgramCache]: Analyzing trace with hash 190218988, now seen corresponding path program 1 times [2023-11-17 15:40:03,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:03,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195494185] [2023-11-17 15:40:03,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:03,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:03,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:40:04,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:40:04,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195494185] [2023-11-17 15:40:04,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195494185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:40:04,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660398864] [2023-11-17 15:40:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:04,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:40:04,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:40:04,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 15:40:04,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:40:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:04,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:40:04,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:40:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:40:04,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:40:04,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:40:04,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660398864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:40:04,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:40:04,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-17 15:40:04,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452655085] [2023-11-17 15:40:04,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:40:04,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:40:04,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:40:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:40:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:40:04,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 496 [2023-11-17 15:40:04,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 103 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 172.14285714285714) internal successors, (1205), 7 states have internal predecessors, (1205), 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) [2023-11-17 15:40:04,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:40:04,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 496 [2023-11-17 15:40:04,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:40:04,540 INFO L124 PetriNetUnfolderBase]: 2574/4173 cut-off events. [2023-11-17 15:40:04,541 INFO L125 PetriNetUnfolderBase]: For 2380/2380 co-relation queries the response was YES. [2023-11-17 15:40:04,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9547 conditions, 4173 events. 2574/4173 cut-off events. For 2380/2380 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 22576 event pairs, 0 based on Foata normal form. 399/4572 useless extension candidates. Maximal degree in co-relation 9534. Up to 2450 conditions per place. [2023-11-17 15:40:04,561 INFO L140 encePairwiseOnDemand]: 493/496 looper letters, 61 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-11-17 15:40:04,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 67 transitions, 330 flow [2023-11-17 15:40:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:40:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:40:04,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1082 transitions. [2023-11-17 15:40:04,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3635752688172043 [2023-11-17 15:40:04,565 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1082 transitions. [2023-11-17 15:40:04,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1082 transitions. [2023-11-17 15:40:04,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:40:04,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1082 transitions. [2023-11-17 15:40:04,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 180.33333333333334) internal successors, (1082), 6 states have internal predecessors, (1082), 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) [2023-11-17 15:40:04,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 496.0) internal successors, (3472), 7 states have internal predecessors, (3472), 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) [2023-11-17 15:40:04,577 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 496.0) internal successors, (3472), 7 states have internal predecessors, (3472), 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) [2023-11-17 15:40:04,577 INFO L175 Difference]: Start difference. First operand has 95 places, 103 transitions, 347 flow. Second operand 6 states and 1082 transitions. [2023-11-17 15:40:04,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 67 transitions, 330 flow [2023-11-17 15:40:04,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 326 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-11-17 15:40:04,581 INFO L231 Difference]: Finished difference. Result has 42 places, 28 transitions, 102 flow [2023-11-17 15:40:04,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=42, PETRI_TRANSITIONS=28} [2023-11-17 15:40:04,583 INFO L281 CegarLoopForPetriNet]: 89 programPoint places, -47 predicate places. [2023-11-17 15:40:04,583 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 28 transitions, 102 flow [2023-11-17 15:40:04,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 172.14285714285714) internal successors, (1205), 7 states have internal predecessors, (1205), 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) [2023-11-17 15:40:04,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:04,584 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:40:04,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 15:40:04,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:40:04,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-17 15:40:04,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1133478292, now seen corresponding path program 1 times [2023-11-17 15:40:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:04,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109668159] [2023-11-17 15:40:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:40:04,807 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:40:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:40:04,829 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:40:04,829 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:40:04,830 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-11-17 15:40:04,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-11-17 15:40:04,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-11-17 15:40:04,830 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-11-17 15:40:04,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-11-17 15:40:04,831 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-11-17 15:40:04,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 15:40:04,831 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-17 15:40:04,832 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:40:04,832 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:40:04,872 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:40:04,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 315 transitions, 670 flow [2023-11-17 15:40:04,967 INFO L124 PetriNetUnfolderBase]: 127/791 cut-off events. [2023-11-17 15:40:04,967 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:40:04,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 791 events. 127/791 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3619 event pairs, 6 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-11-17 15:40:04,977 INFO L82 GeneralOperation]: Start removeDead. Operand has 269 places, 315 transitions, 670 flow [2023-11-17 15:40:04,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 269 places, 315 transitions, 670 flow [2023-11-17 15:40:04,982 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:40:04,982 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 269 places, 315 transitions, 670 flow [2023-11-17 15:40:04,982 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 269 places, 315 transitions, 670 flow [2023-11-17 15:40:04,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 269 places, 315 transitions, 670 flow [2023-11-17 15:40:05,056 INFO L124 PetriNetUnfolderBase]: 127/791 cut-off events. [2023-11-17 15:40:05,056 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:40:05,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 842 conditions, 791 events. 127/791 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3619 event pairs, 6 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-11-17 15:40:05,162 INFO L119 LiptonReduction]: Number of co-enabled transitions 65104 [2023-11-17 15:40:09,445 INFO L134 LiptonReduction]: Checked pairs total: 160826 [2023-11-17 15:40:09,445 INFO L136 LiptonReduction]: Total number of compositions: 279 [2023-11-17 15:40:09,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:40:09,447 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=LoopHeads, 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;@2eb8bcb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:40:09,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-17 15:40:09,449 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:40:09,449 INFO L124 PetriNetUnfolderBase]: 5/22 cut-off events. [2023-11-17 15:40:09,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:40:09,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:40:09,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-17 15:40:09,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-11-17 15:40:09,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:40:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash -2084776707, now seen corresponding path program 1 times [2023-11-17 15:40:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:40:09,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984885358] [2023-11-17 15:40:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:40:09,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:40:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:40:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:40:09,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:40:09,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984885358] [2023-11-17 15:40:09,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984885358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:40:09,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:40:09,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 15:40:09,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345451066] [2023-11-17 15:40:09,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:40:09,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:40:09,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:40:09,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:40:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:40:09,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 594 [2023-11-17 15:40:09,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 153 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 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) [2023-11-17 15:40:09,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:40:09,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 594 [2023-11-17 15:40:09,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand