/root/.sdkman/candidates/java/21.0.5-tem/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata ./data -tc ../benchexec/../../../trunk/examples/toolchains/AutomizerCInline_IcfgBuilder.xml -s ../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.automaton.type.used.in.concurrency.analysis PETRI_NET --preprocessor.replace.while.statements.and.if-then-else.statements false -i ../../../trunk/examples/svcomp/pthread-theta/exponential-nondet.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 01:46:20,610 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 01:46:20,666 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-14 01:46:20,671 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 01:46:20,671 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 01:46:20,691 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 01:46:20,691 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 01:46:20,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 01:46:20,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 01:46:20,691 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 01:46:20,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 01:46:20,692 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 01:46:20,692 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 01:46:20,692 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 01:46:20,693 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:46:20,693 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:46:20,693 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 01:46:20,693 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 01:46:20,694 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 01:46:20,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 01:46:20,694 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 01:46:20,694 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 01:46:20,694 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 01:46:20,694 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 01:46:20,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 01:46:20,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 01:46:20,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 01:46:20,936 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 01:46:20,938 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 01:46:20,939 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-theta/exponential-nondet.i [2025-04-14 01:46:22,190 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eaffca45/5c53b27c417045b6913f0957dcab0702/FLAG274aeea6b [2025-04-14 01:46:22,473 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 01:46:22,473 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/exponential-nondet.i [2025-04-14 01:46:22,486 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eaffca45/5c53b27c417045b6913f0957dcab0702/FLAG274aeea6b [2025-04-14 01:46:23,191 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3eaffca45/5c53b27c417045b6913f0957dcab0702 [2025-04-14 01:46:23,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 01:46:23,196 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 01:46:23,197 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 01:46:23,197 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 01:46:23,200 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 01:46:23,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@498a6ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23, skipping insertion in model container [2025-04-14 01:46:23,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,228 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 01:46:23,448 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/exponential-nondet.i[33030,33043] [2025-04-14 01:46:23,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:46:23,468 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 01:46:23,537 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-theta/exponential-nondet.i[33030,33043] [2025-04-14 01:46:23,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 01:46:23,573 INFO L204 MainTranslator]: Completed translation [2025-04-14 01:46:23,573 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23 WrapperNode [2025-04-14 01:46:23,573 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 01:46:23,576 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 01:46:23,576 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 01:46:23,576 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 01:46:23,580 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,595 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,610 INFO L138 Inliner]: procedures = 169, calls = 10, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 58 [2025-04-14 01:46:23,611 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 01:46:23,611 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 01:46:23,611 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 01:46:23,611 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 01:46:23,617 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,619 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,636 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-14 01:46:23,636 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,636 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,642 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,643 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,644 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,652 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 01:46:23,652 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 01:46:23,652 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 01:46:23,652 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 01:46:23,653 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (1/1) ... [2025-04-14 01:46:23,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 01:46:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:23,680 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-14 01:46:23,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-14 01:46:23,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 01:46:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure f1 [2025-04-14 01:46:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure f1 [2025-04-14 01:46:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2025-04-14 01:46:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2025-04-14 01:46:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 01:46:23,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 01:46:23,705 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 01:46:23,706 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 01:46:23,817 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 01:46:23,818 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 01:46:23,936 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 01:46:23,937 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 01:46:23,937 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 01:46:24,049 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 01:46:24,060 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 01:46:24,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:46:24 BoogieIcfgContainer [2025-04-14 01:46:24,061 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 01:46:24,063 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 01:46:24,063 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 01:46:24,066 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 01:46:24,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 01:46:23" (1/3) ... [2025-04-14 01:46:24,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385cd845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:46:24, skipping insertion in model container [2025-04-14 01:46:24,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 01:46:23" (2/3) ... [2025-04-14 01:46:24,067 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@385cd845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 01:46:24, skipping insertion in model container [2025-04-14 01:46:24,067 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 01:46:24" (3/3) ... [2025-04-14 01:46:24,068 INFO L128 eAbstractionObserver]: Analyzing ICFG exponential-nondet.i [2025-04-14 01:46:24,080 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 01:46:24,081 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG exponential-nondet.i that has 3 procedures, 16 locations, 16 edges, 1 initial locations, 2 loop locations, and 1 error locations. [2025-04-14 01:46:24,081 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 01:46:24,118 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-14 01:46:24,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 18 transitions, 44 flow [2025-04-14 01:46:24,161 INFO L116 PetriNetUnfolderBase]: 2/20 cut-off events. [2025-04-14 01:46:24,163 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 01:46:24,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 20 events. 2/20 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 34 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 15. Up to 4 conditions per place. [2025-04-14 01:46:24,165 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 18 transitions, 44 flow [2025-04-14 01:46:24,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 16 transitions, 39 flow [2025-04-14 01:46:24,175 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:46:24,185 INFO L340 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, 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;@63674e12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:46:24,185 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 01:46:24,192 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:46:24,192 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-14 01:46:24,192 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 01:46:24,192 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:24,197 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-14 01:46:24,197 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:24,201 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:24,201 INFO L85 PathProgramCache]: Analyzing trace with hash 5802, now seen corresponding path program 1 times [2025-04-14 01:46:24,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:24,207 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490004703] [2025-04-14 01:46:24,207 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:24,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:24,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:24,293 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:24,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:24,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:46:24,299 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2037336927] [2025-04-14 01:46:24,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:24,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:24,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:24,303 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) [2025-04-14 01:46:24,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-14 01:46:24,359 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:24,369 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:24,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:24,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:24,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-14 01:46:24,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:46:24,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:24,394 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 01:46:24,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:24,395 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490004703] [2025-04-14 01:46:24,395 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:46:24,395 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037336927] [2025-04-14 01:46:24,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037336927] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:46:24,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:46:24,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 01:46:24,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530745933] [2025-04-14 01:46:24,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:24,404 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:46:24,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:24,422 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:46:24,422 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:46:24,423 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 18 [2025-04-14 01:46:24,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 39 flow. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2025-04-14 01:46:24,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:24,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 18 [2025-04-14 01:46:24,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:24,488 INFO L116 PetriNetUnfolderBase]: 49/94 cut-off events. [2025-04-14 01:46:24,488 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 01:46:24,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 94 events. 49/94 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 270 event pairs, 7 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 180. Up to 70 conditions per place. [2025-04-14 01:46:24,490 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 17 selfloop transitions, 2 changer transitions 1/23 dead transitions. [2025-04-14 01:46:24,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 23 transitions, 96 flow [2025-04-14 01:46:24,491 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:46:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:46:24,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 33 transitions. [2025-04-14 01:46:24,498 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2025-04-14 01:46:24,499 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 39 flow. Second operand 3 states and 33 transitions. [2025-04-14 01:46:24,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 23 transitions, 96 flow [2025-04-14 01:46:24,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:46:24,520 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 44 flow [2025-04-14 01:46:24,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2025-04-14 01:46:24,524 INFO L279 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2025-04-14 01:46:24,524 INFO L485 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 44 flow [2025-04-14 01:46:24,524 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2025-04-14 01:46:24,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:24,524 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-04-14 01:46:24,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-14 01:46:24,726 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2025-04-14 01:46:24,727 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:24,727 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1110870321, now seen corresponding path program 1 times [2025-04-14 01:46:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:24,728 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49054855] [2025-04-14 01:46:24,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:24,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:24,745 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 01:46:24,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 01:46:24,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:24,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:46:24,758 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-14 01:46:24,765 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-04-14 01:46:24,779 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-04-14 01:46:24,779 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:24,779 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:46:24,795 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-14 01:46:24,795 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-14 01:46:24,796 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-14 01:46:24,798 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-14 01:46:24,798 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 01:46:24,798 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 01:46:24,798 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1] [2025-04-14 01:46:24,801 WARN L247 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-14 01:46:24,801 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2025-04-14 01:46:24,831 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-14 01:46:24,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 34 places, 26 transitions, 72 flow [2025-04-14 01:46:24,844 INFO L116 PetriNetUnfolderBase]: 3/34 cut-off events. [2025-04-14 01:46:24,844 INFO L117 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-04-14 01:46:24,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 34 events. 3/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 65 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 33. Up to 6 conditions per place. [2025-04-14 01:46:24,844 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 26 transitions, 72 flow [2025-04-14 01:46:24,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 24 transitions, 66 flow [2025-04-14 01:46:24,846 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:46:24,846 INFO L340 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, 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;@63674e12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:46:24,846 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 01:46:24,847 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:46:24,848 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-14 01:46:24,848 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 01:46:24,848 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:24,848 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-14 01:46:24,848 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:24,848 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash 6634, now seen corresponding path program 1 times [2025-04-14 01:46:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:24,848 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912654837] [2025-04-14 01:46:24,848 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:24,856 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:24,865 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:24,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:24,866 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:46:24,866 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519386250] [2025-04-14 01:46:24,866 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:24,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:24,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:24,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:46:24,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-14 01:46:24,913 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:24,920 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:24,920 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:24,920 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:24,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-14 01:46:24,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:46:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:24,929 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 01:46:24,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:24,929 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912654837] [2025-04-14 01:46:24,929 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:46:24,929 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519386250] [2025-04-14 01:46:24,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519386250] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:46:24,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:46:24,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 01:46:24,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67919755] [2025-04-14 01:46:24,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:24,930 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:46:24,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:24,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:46:24,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:46:24,931 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2025-04-14 01:46:24,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2025-04-14 01:46:24,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:24,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2025-04-14 01:46:24,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:25,144 INFO L116 PetriNetUnfolderBase]: 1000/1423 cut-off events. [2025-04-14 01:46:25,145 INFO L117 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2025-04-14 01:46:25,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2955 conditions, 1423 events. 1000/1423 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 6068 event pairs, 179 based on Foata normal form. 0/1243 useless extension candidates. Maximal degree in co-relation 1724. Up to 1314 conditions per place. [2025-04-14 01:46:25,156 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 28 selfloop transitions, 3 changer transitions 1/37 dead transitions. [2025-04-14 01:46:25,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 37 transitions, 169 flow [2025-04-14 01:46:25,157 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:46:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:46:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2025-04-14 01:46:25,157 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6538461538461539 [2025-04-14 01:46:25,157 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 66 flow. Second operand 3 states and 51 transitions. [2025-04-14 01:46:25,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 37 transitions, 169 flow [2025-04-14 01:46:25,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 167 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:46:25,159 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 82 flow [2025-04-14 01:46:25,159 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2025-04-14 01:46:25,159 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2025-04-14 01:46:25,160 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 82 flow [2025-04-14 01:46:25,160 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2025-04-14 01:46:25,160 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:25,160 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:25,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-14 01:46:25,360 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2025-04-14 01:46:25,360 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:25,361 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:25,361 INFO L85 PathProgramCache]: Analyzing trace with hash 460446768, now seen corresponding path program 1 times [2025-04-14 01:46:25,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:25,361 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550317043] [2025-04-14 01:46:25,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:25,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:25,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-14 01:46:25,375 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-14 01:46:25,375 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:25,375 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:25,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:25,485 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550317043] [2025-04-14 01:46:25,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550317043] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:46:25,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:46:25,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-14 01:46:25,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021719481] [2025-04-14 01:46:25,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:25,485 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:46:25,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:25,486 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:46:25,486 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:46:25,486 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2025-04-14 01:46:25,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2025-04-14 01:46:25,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:25,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2025-04-14 01:46:25,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:25,658 INFO L116 PetriNetUnfolderBase]: 1227/1789 cut-off events. [2025-04-14 01:46:25,658 INFO L117 PetriNetUnfolderBase]: For 477/477 co-relation queries the response was YES. [2025-04-14 01:46:25,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 1789 events. 1227/1789 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8562 event pairs, 706 based on Foata normal form. 78/1750 useless extension candidates. Maximal degree in co-relation 2527. Up to 1408 conditions per place. [2025-04-14 01:46:25,672 INFO L140 encePairwiseOnDemand]: 22/26 looper letters, 28 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2025-04-14 01:46:25,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 36 transitions, 176 flow [2025-04-14 01:46:25,673 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:46:25,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:46:25,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 52 transitions. [2025-04-14 01:46:25,674 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-14 01:46:25,674 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 82 flow. Second operand 4 states and 52 transitions. [2025-04-14 01:46:25,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 36 transitions, 176 flow [2025-04-14 01:46:25,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 171 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:46:25,675 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 93 flow [2025-04-14 01:46:25,675 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2025-04-14 01:46:25,676 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2025-04-14 01:46:25,676 INFO L485 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 93 flow [2025-04-14 01:46:25,676 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 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) [2025-04-14 01:46:25,676 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:25,676 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:25,676 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 01:46:25,676 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:25,678 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:25,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1941590345, now seen corresponding path program 1 times [2025-04-14 01:46:25,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:25,679 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053871940] [2025-04-14 01:46:25,679 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:25,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:25,688 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:46:25,715 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:46:25,715 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:25,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:46:25,720 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998317943] [2025-04-14 01:46:25,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:25,724 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:46:25,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-14 01:46:25,766 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:46:25,780 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:46:25,780 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:25,780 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:25,781 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:46:25,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:46:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:25,810 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:46:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:25,905 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053871940] [2025-04-14 01:46:25,905 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:46:25,905 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998317943] [2025-04-14 01:46:25,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998317943] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:46:25,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:46:25,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2025-04-14 01:46:25,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921859351] [2025-04-14 01:46:25,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-14 01:46:25,905 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 01:46:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:25,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 01:46:25,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:46:25,906 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 26 [2025-04-14 01:46:25,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2025-04-14 01:46:25,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:25,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 26 [2025-04-14 01:46:25,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:26,185 INFO L116 PetriNetUnfolderBase]: 1648/2328 cut-off events. [2025-04-14 01:46:26,185 INFO L117 PetriNetUnfolderBase]: For 1227/1227 co-relation queries the response was YES. [2025-04-14 01:46:26,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5848 conditions, 2328 events. 1648/2328 cut-off events. For 1227/1227 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 10453 event pairs, 163 based on Foata normal form. 156/2477 useless extension candidates. Maximal degree in co-relation 4246. Up to 673 conditions per place. [2025-04-14 01:46:26,198 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 51 selfloop transitions, 16 changer transitions 4/76 dead transitions. [2025-04-14 01:46:26,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 76 transitions, 382 flow [2025-04-14 01:46:26,199 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:46:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:46:26,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2025-04-14 01:46:26,201 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5989010989010989 [2025-04-14 01:46:26,201 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 93 flow. Second operand 7 states and 109 transitions. [2025-04-14 01:46:26,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 76 transitions, 382 flow [2025-04-14 01:46:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 76 transitions, 375 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-14 01:46:26,204 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 205 flow [2025-04-14 01:46:26,204 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=205, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2025-04-14 01:46:26,204 INFO L279 CegarLoopForPetriNet]: 32 programPoint places, 11 predicate places. [2025-04-14 01:46:26,204 INFO L485 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 205 flow [2025-04-14 01:46:26,205 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 6 states have internal predecessors, (47), 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) [2025-04-14 01:46:26,205 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:26,205 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:26,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-14 01:46:26,410 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:26,410 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:26,411 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 152007086, now seen corresponding path program 1 times [2025-04-14 01:46:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:26,412 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010389947] [2025-04-14 01:46:26,412 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:26,420 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-14 01:46:26,431 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-14 01:46:26,431 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:26,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:46:26,431 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-14 01:46:26,433 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-14 01:46:26,440 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-14 01:46:26,440 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:26,440 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:46:26,446 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-14 01:46:26,446 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-14 01:46:26,446 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-14 01:46:26,447 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-14 01:46:26,447 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 01:46:26,447 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-14 01:46:26,447 INFO L422 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2025-04-14 01:46:26,447 WARN L247 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-14 01:46:26,447 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2025-04-14 01:46:26,465 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-14 01:46:26,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 46 places, 34 transitions, 104 flow [2025-04-14 01:46:26,471 INFO L116 PetriNetUnfolderBase]: 4/48 cut-off events. [2025-04-14 01:46:26,471 INFO L117 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-04-14 01:46:26,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 48 events. 4/48 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 106 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 55. Up to 8 conditions per place. [2025-04-14 01:46:26,471 INFO L82 GeneralOperation]: Start removeDead. Operand has 46 places, 34 transitions, 104 flow [2025-04-14 01:46:26,472 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 32 transitions, 97 flow [2025-04-14 01:46:26,473 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:46:26,473 INFO L340 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, 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;@63674e12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:46:26,473 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 01:46:26,474 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:46:26,474 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-14 01:46:26,474 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 01:46:26,474 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:26,474 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-14 01:46:26,474 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:26,475 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash 7722, now seen corresponding path program 1 times [2025-04-14 01:46:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:26,475 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454345703] [2025-04-14 01:46:26,475 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:26,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:26,480 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:26,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:26,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:26,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:46:26,485 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [797320948] [2025-04-14 01:46:26,485 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:26,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:26,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:26,493 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:46:26,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-14 01:46:26,540 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:26,545 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:26,545 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:26,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:26,546 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-14 01:46:26,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:46:26,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:26,550 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 01:46:26,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:26,550 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454345703] [2025-04-14 01:46:26,551 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:46:26,551 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797320948] [2025-04-14 01:46:26,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797320948] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:46:26,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:46:26,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 01:46:26,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5952537] [2025-04-14 01:46:26,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:26,551 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:46:26,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:26,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:46:26,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:46:26,552 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-04-14 01:46:26,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 97 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2025-04-14 01:46:26,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:26,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-04-14 01:46:26,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:27,714 INFO L116 PetriNetUnfolderBase]: 14230/18055 cut-off events. [2025-04-14 01:46:27,715 INFO L117 PetriNetUnfolderBase]: For 2064/2064 co-relation queries the response was YES. [2025-04-14 01:46:27,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37490 conditions, 18055 events. 14230/18055 cut-off events. For 2064/2064 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 85233 event pairs, 3236 based on Foata normal form. 0/16422 useless extension candidates. Maximal degree in co-relation 10804. Up to 17625 conditions per place. [2025-04-14 01:46:27,811 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 38 selfloop transitions, 4 changer transitions 1/50 dead transitions. [2025-04-14 01:46:27,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 50 transitions, 246 flow [2025-04-14 01:46:27,812 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:46:27,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:46:27,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2025-04-14 01:46:27,813 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2025-04-14 01:46:27,813 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 97 flow. Second operand 3 states and 68 transitions. [2025-04-14 01:46:27,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 50 transitions, 246 flow [2025-04-14 01:46:27,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 236 flow, removed 4 selfloop flow, removed 1 redundant places. [2025-04-14 01:46:27,815 INFO L231 Difference]: Finished difference. Result has 46 places, 34 transitions, 116 flow [2025-04-14 01:46:27,817 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=34} [2025-04-14 01:46:27,819 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 2 predicate places. [2025-04-14 01:46:27,819 INFO L485 AbstractCegarLoop]: Abstraction has has 46 places, 34 transitions, 116 flow [2025-04-14 01:46:27,819 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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) [2025-04-14 01:46:27,819 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:27,819 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:27,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-14 01:46:28,020 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:28,020 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:28,020 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1669214147, now seen corresponding path program 1 times [2025-04-14 01:46:28,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:28,021 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042312696] [2025-04-14 01:46:28,021 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:28,025 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-14 01:46:28,028 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-14 01:46:28,028 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:28,028 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:28,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:28,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:28,075 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042312696] [2025-04-14 01:46:28,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042312696] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:46:28,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:46:28,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-14 01:46:28,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737222587] [2025-04-14 01:46:28,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:28,075 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:46:28,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:28,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:46:28,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:46:28,076 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-04-14 01:46:28,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 34 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2025-04-14 01:46:28,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:28,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-04-14 01:46:28,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:29,315 INFO L116 PetriNetUnfolderBase]: 17373/22543 cut-off events. [2025-04-14 01:46:29,315 INFO L117 PetriNetUnfolderBase]: For 6645/6645 co-relation queries the response was YES. [2025-04-14 01:46:29,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51225 conditions, 22543 events. 17373/22543 cut-off events. For 6645/6645 co-relation queries the response was YES. Maximal size of possible extension queue 982. Compared 119511 event pairs, 10953 based on Foata normal form. 780/22260 useless extension candidates. Maximal degree in co-relation 32131. Up to 18013 conditions per place. [2025-04-14 01:46:29,476 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 40 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2025-04-14 01:46:29,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 249 flow [2025-04-14 01:46:29,477 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:46:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:46:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2025-04-14 01:46:29,479 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5147058823529411 [2025-04-14 01:46:29,479 INFO L175 Difference]: Start difference. First operand has 46 places, 34 transitions, 116 flow. Second operand 4 states and 70 transitions. [2025-04-14 01:46:29,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 249 flow [2025-04-14 01:46:29,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:46:29,486 INFO L231 Difference]: Finished difference. Result has 49 places, 35 transitions, 126 flow [2025-04-14 01:46:29,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=126, PETRI_PLACES=49, PETRI_TRANSITIONS=35} [2025-04-14 01:46:29,486 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2025-04-14 01:46:29,486 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 35 transitions, 126 flow [2025-04-14 01:46:29,487 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2025-04-14 01:46:29,487 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:29,487 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:29,487 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-14 01:46:29,487 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:29,487 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:29,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1376660478, now seen corresponding path program 1 times [2025-04-14 01:46:29,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:29,489 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141246170] [2025-04-14 01:46:29,489 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:29,499 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:46:29,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:46:29,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:29,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:46:29,522 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075810736] [2025-04-14 01:46:29,522 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:29,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:29,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:29,528 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:46:29,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-14 01:46:29,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:46:29,595 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:46:29,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:29,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:29,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 01:46:29,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:46:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:29,643 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:46:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:46:29,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:29,693 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141246170] [2025-04-14 01:46:29,693 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:46:29,693 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075810736] [2025-04-14 01:46:29,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075810736] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:46:29,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-14 01:46:29,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2025-04-14 01:46:29,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497560089] [2025-04-14 01:46:29,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:29,693 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:46:29,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:29,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:46:29,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2025-04-14 01:46:29,694 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-04-14 01:46:29,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 35 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-14 01:46:29,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:29,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-04-14 01:46:29,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:31,130 INFO L116 PetriNetUnfolderBase]: 23321/29524 cut-off events. [2025-04-14 01:46:31,130 INFO L117 PetriNetUnfolderBase]: For 11220/11220 co-relation queries the response was YES. [2025-04-14 01:46:31,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73004 conditions, 29524 events. 23321/29524 cut-off events. For 11220/11220 co-relation queries the response was YES. Maximal size of possible extension queue 1232. Compared 147550 event pairs, 6816 based on Foata normal form. 780/30270 useless extension candidates. Maximal degree in co-relation 47024. Up to 22069 conditions per place. [2025-04-14 01:46:31,276 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 42 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2025-04-14 01:46:31,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 306 flow [2025-04-14 01:46:31,277 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:46:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:46:31,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2025-04-14 01:46:31,277 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2025-04-14 01:46:31,277 INFO L175 Difference]: Start difference. First operand has 49 places, 35 transitions, 126 flow. Second operand 3 states and 70 transitions. [2025-04-14 01:46:31,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 306 flow [2025-04-14 01:46:31,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2025-04-14 01:46:31,286 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 178 flow [2025-04-14 01:46:31,286 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2025-04-14 01:46:31,287 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2025-04-14 01:46:31,287 INFO L485 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 178 flow [2025-04-14 01:46:31,287 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-14 01:46:31,287 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:31,287 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:31,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-04-14 01:46:31,491 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:31,491 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:31,491 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:31,491 INFO L85 PathProgramCache]: Analyzing trace with hash -206418626, now seen corresponding path program 2 times [2025-04-14 01:46:31,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:31,491 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65130193] [2025-04-14 01:46:31,491 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:46:31,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:31,496 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-14 01:46:31,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:46:31,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:46:31,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:46:31,512 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713973301] [2025-04-14 01:46:31,512 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:46:31,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:31,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:31,514 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:46:31,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-14 01:46:31,558 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 9 statements into 2 equivalence classes. [2025-04-14 01:46:31,569 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:46:31,569 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:46:31,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:31,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 01:46:31,571 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:46:31,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:31,598 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:46:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 01:46:31,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:31,634 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65130193] [2025-04-14 01:46:31,634 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:46:31,634 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713973301] [2025-04-14 01:46:31,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713973301] provided 1 perfect and 1 imperfect interpolant sequences [2025-04-14 01:46:31,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-14 01:46:31,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2025-04-14 01:46:31,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407867588] [2025-04-14 01:46:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:31,634 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:46:31,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:31,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:46:31,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:46:31,635 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2025-04-14 01:46:31,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-14 01:46:31,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:31,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2025-04-14 01:46:31,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:33,008 INFO L116 PetriNetUnfolderBase]: 20347/26297 cut-off events. [2025-04-14 01:46:33,008 INFO L117 PetriNetUnfolderBase]: For 23873/23873 co-relation queries the response was YES. [2025-04-14 01:46:33,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69062 conditions, 26297 events. 20347/26297 cut-off events. For 23873/23873 co-relation queries the response was YES. Maximal size of possible extension queue 1161. Compared 140263 event pairs, 7412 based on Foata normal form. 780/26833 useless extension candidates. Maximal degree in co-relation 25076. Up to 16253 conditions per place. [2025-04-14 01:46:33,151 INFO L140 encePairwiseOnDemand]: 32/34 looper letters, 24 selfloop transitions, 0 changer transitions 22/53 dead transitions. [2025-04-14 01:46:33,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 53 transitions, 322 flow [2025-04-14 01:46:33,156 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:46:33,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:46:33,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2025-04-14 01:46:33,156 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5882352941176471 [2025-04-14 01:46:33,156 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 178 flow. Second operand 3 states and 60 transitions. [2025-04-14 01:46:33,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 53 transitions, 322 flow [2025-04-14 01:46:33,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 288 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-04-14 01:46:33,250 INFO L231 Difference]: Finished difference. Result has 50 places, 31 transitions, 112 flow [2025-04-14 01:46:33,250 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=31} [2025-04-14 01:46:33,251 INFO L279 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2025-04-14 01:46:33,251 INFO L485 AbstractCegarLoop]: Abstraction has has 50 places, 31 transitions, 112 flow [2025-04-14 01:46:33,251 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-14 01:46:33,253 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:33,253 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:33,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-14 01:46:33,453 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:33,454 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:33,454 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:33,454 INFO L85 PathProgramCache]: Analyzing trace with hash 616200071, now seen corresponding path program 1 times [2025-04-14 01:46:33,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:33,454 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161526052] [2025-04-14 01:46:33,454 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:33,464 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-14 01:46:33,470 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-14 01:46:33,470 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:33,470 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:46:33,470 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-14 01:46:33,472 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-04-14 01:46:33,479 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-04-14 01:46:33,479 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:33,479 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-14 01:46:33,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-14 01:46:33,487 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-14 01:46:33,487 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2025-04-14 01:46:33,487 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2025-04-14 01:46:33,488 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 01:46:33,488 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-04-14 01:46:33,488 INFO L422 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2025-04-14 01:46:33,488 WARN L247 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2025-04-14 01:46:33,488 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2025-04-14 01:46:33,511 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-14 01:46:33,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 58 places, 42 transitions, 140 flow [2025-04-14 01:46:33,516 INFO L116 PetriNetUnfolderBase]: 5/62 cut-off events. [2025-04-14 01:46:33,516 INFO L117 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-04-14 01:46:33,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 62 events. 5/62 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 130 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 79. Up to 10 conditions per place. [2025-04-14 01:46:33,517 INFO L82 GeneralOperation]: Start removeDead. Operand has 58 places, 42 transitions, 140 flow [2025-04-14 01:46:33,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 40 transitions, 132 flow [2025-04-14 01:46:33,518 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 01:46:33,518 INFO L340 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, 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;@63674e12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 01:46:33,518 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 01:46:33,519 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 01:46:33,519 INFO L116 PetriNetUnfolderBase]: 1/3 cut-off events. [2025-04-14 01:46:33,519 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-14 01:46:33,519 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:33,519 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1] [2025-04-14 01:46:33,519 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:33,519 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 9066, now seen corresponding path program 1 times [2025-04-14 01:46:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:33,519 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062230413] [2025-04-14 01:46:33,519 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:33,523 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:33,528 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:33,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:33,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:46:33,529 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538027627] [2025-04-14 01:46:33,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:33,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:33,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:46:33,530 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:46:33,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-14 01:46:33,578 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 2 statements into 1 equivalence classes. [2025-04-14 01:46:33,582 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 2 of 2 statements. [2025-04-14 01:46:33,582 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:33,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:33,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-14 01:46:33,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:46:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:33,588 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 01:46:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:33,588 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062230413] [2025-04-14 01:46:33,588 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:46:33,588 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538027627] [2025-04-14 01:46:33,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538027627] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:46:33,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:46:33,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 01:46:33,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439111414] [2025-04-14 01:46:33,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:33,589 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 01:46:33,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:33,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 01:46:33,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 01:46:33,589 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2025-04-14 01:46:33,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-14 01:46:33,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:33,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2025-04-14 01:46:33,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:42,950 INFO L116 PetriNetUnfolderBase]: 174799/209242 cut-off events. [2025-04-14 01:46:42,950 INFO L117 PetriNetUnfolderBase]: For 31350/31350 co-relation queries the response was YES. [2025-04-14 01:46:43,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434365 conditions, 209242 events. 174799/209242 cut-off events. For 31350/31350 co-relation queries the response was YES. Maximal size of possible extension queue 6449. Compared 1036944 event pairs, 47894 based on Foata normal form. 0/194494 useless extension candidates. Maximal degree in co-relation 129523. Up to 207651 conditions per place. [2025-04-14 01:46:44,135 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 48 selfloop transitions, 5 changer transitions 1/63 dead transitions. [2025-04-14 01:46:44,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 331 flow [2025-04-14 01:46:44,135 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 01:46:44,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 01:46:44,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2025-04-14 01:46:44,136 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2025-04-14 01:46:44,136 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 132 flow. Second operand 3 states and 85 transitions. [2025-04-14 01:46:44,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 331 flow [2025-04-14 01:46:44,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 63 transitions, 305 flow, removed 12 selfloop flow, removed 1 redundant places. [2025-04-14 01:46:44,151 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 150 flow [2025-04-14 01:46:44,151 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2025-04-14 01:46:44,152 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2025-04-14 01:46:44,152 INFO L485 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 150 flow [2025-04-14 01:46:44,152 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 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) [2025-04-14 01:46:44,152 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:46:44,152 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:46:44,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-14 01:46:44,352 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:46:44,353 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:46:44,353 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:46:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash 300423626, now seen corresponding path program 1 times [2025-04-14 01:46:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:46:44,353 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288775354] [2025-04-14 01:46:44,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:46:44,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:46:44,360 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-04-14 01:46:44,363 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-04-14 01:46:44,363 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:46:44,363 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:46:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:46:44,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:46:44,408 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288775354] [2025-04-14 01:46:44,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288775354] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:46:44,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 01:46:44,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-14 01:46:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185818484] [2025-04-14 01:46:44,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:46:44,409 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 01:46:44,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:46:44,409 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 01:46:44,409 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-14 01:46:44,409 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2025-04-14 01:46:44,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2025-04-14 01:46:44,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:46:44,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2025-04-14 01:46:44,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:46:58,060 INFO L116 PetriNetUnfolderBase]: 212934/259738 cut-off events. [2025-04-14 01:46:58,061 INFO L117 PetriNetUnfolderBase]: For 73647/73647 co-relation queries the response was YES. [2025-04-14 01:46:58,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587069 conditions, 259738 events. 212934/259738 cut-off events. For 73647/73647 co-relation queries the response was YES. Maximal size of possible extension queue 8197. Compared 1459996 event pairs, 152466 based on Foata normal form. 7260/257431 useless extension candidates. Maximal degree in co-relation 372925. Up to 209119 conditions per place. [2025-04-14 01:46:59,936 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 52 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2025-04-14 01:46:59,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 322 flow [2025-04-14 01:46:59,938 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 01:46:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 01:46:59,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2025-04-14 01:46:59,939 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2025-04-14 01:46:59,939 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 150 flow. Second operand 4 states and 88 transitions. [2025-04-14 01:46:59,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 322 flow [2025-04-14 01:47:00,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 64 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 01:47:00,027 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 159 flow [2025-04-14 01:47:00,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2025-04-14 01:47:00,028 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2025-04-14 01:47:00,028 INFO L485 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 159 flow [2025-04-14 01:47:00,028 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 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) [2025-04-14 01:47:00,028 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:47:00,028 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:47:00,029 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-04-14 01:47:00,029 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:47:00,029 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:47:00,029 INFO L85 PathProgramCache]: Analyzing trace with hash 932647995, now seen corresponding path program 1 times [2025-04-14 01:47:00,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:47:00,029 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567591782] [2025-04-14 01:47:00,029 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:47:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:47:00,042 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:47:00,054 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:47:00,054 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:00,055 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unknown [2025-04-14 01:47:00,055 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814498705] [2025-04-14 01:47:00,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 01:47:00,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:47:00,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:47:00,064 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:47:00,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-14 01:47:00,154 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-04-14 01:47:00,168 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-04-14 01:47:00,168 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 01:47:00,168 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:00,169 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-04-14 01:47:00,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:47:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:00,194 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:47:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:47:00,274 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567591782] [2025-04-14 01:47:00,274 WARN L301 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2025-04-14 01:47:00,274 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814498705] [2025-04-14 01:47:00,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814498705] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:47:00,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-14 01:47:00,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 5 [2025-04-14 01:47:00,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12647934] [2025-04-14 01:47:00,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-14 01:47:00,274 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 01:47:00,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:47:00,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 01:47:00,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-04-14 01:47:00,275 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2025-04-14 01:47:00,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 159 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2025-04-14 01:47:00,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:47:00,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2025-04-14 01:47:00,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 01:47:16,601 INFO L116 PetriNetUnfolderBase]: 288496/344958 cut-off events. [2025-04-14 01:47:16,601 INFO L117 PetriNetUnfolderBase]: For 124950/124950 co-relation queries the response was YES. [2025-04-14 01:47:17,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 830567 conditions, 344958 events. 288496/344958 cut-off events. For 124950/124950 co-relation queries the response was YES. Maximal size of possible extension queue 9817. Compared 1779650 event pairs, 28710 based on Foata normal form. 14520/359411 useless extension candidates. Maximal degree in co-relation 537946. Up to 110593 conditions per place. [2025-04-14 01:47:18,854 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 30 changer transitions 0/140 dead transitions. [2025-04-14 01:47:18,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 140 transitions, 708 flow [2025-04-14 01:47:18,858 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 01:47:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 01:47:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2025-04-14 01:47:18,859 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2025-04-14 01:47:18,859 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 159 flow. Second operand 7 states and 191 transitions. [2025-04-14 01:47:18,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 140 transitions, 708 flow [2025-04-14 01:47:18,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 140 transitions, 701 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-04-14 01:47:18,991 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 387 flow [2025-04-14 01:47:18,991 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=387, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2025-04-14 01:47:18,992 INFO L279 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2025-04-14 01:47:18,992 INFO L485 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 387 flow [2025-04-14 01:47:18,992 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2025-04-14 01:47:18,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 01:47:18,992 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 01:47:18,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-04-14 01:47:19,196 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-14 01:47:19,196 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 01:47:19,196 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 01:47:19,196 INFO L85 PathProgramCache]: Analyzing trace with hash 937607146, now seen corresponding path program 2 times [2025-04-14 01:47:19,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 01:47:19,196 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562077843] [2025-04-14 01:47:19,196 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:47:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 01:47:19,200 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-04-14 01:47:19,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-04-14 01:47:19,204 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:47:19,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:19,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 01:47:19,261 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562077843] [2025-04-14 01:47:19,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562077843] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 01:47:19,261 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889413326] [2025-04-14 01:47:19,261 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 01:47:19,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 01:47:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 01:47:19,263 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 01:47:19,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-14 01:47:19,310 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-04-14 01:47:19,318 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-04-14 01:47:19,318 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 01:47:19,318 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 01:47:19,319 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-14 01:47:19,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:47:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:47:19,350 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-14 01:47:19,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889413326] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 01:47:19,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-04-14 01:47:19,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2025-04-14 01:47:19,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117181664] [2025-04-14 01:47:19,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 01:47:19,351 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-14 01:47:19,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:47:19,351 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-14 01:47:19,351 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2025-04-14 01:47:19,351 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2025-04-14 01:47:19,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 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) [2025-04-14 01:47:19,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:47:19,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2025-04-14 01:47:19,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand