/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/fib_safe-6.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:44:14,437 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:44:14,486 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 [2025-04-13 23:44:14,489 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:44:14,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:44:14,507 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:44:14,507 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:44:14,507 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:44:14,508 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:44:14,508 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:44:14,509 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:44:14,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:44:14,509 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:44:14,509 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:44:14,509 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:44:14,509 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:44:14,509 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:44:14,509 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:44:14,509 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:44:14,509 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:44:14,510 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,510 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,510 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:44:14,511 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:44:14,511 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 [2025-04-13 23:44:14,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:44:14,762 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:44:14,764 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:44:14,765 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:44:14,765 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:44:14,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-6.i [2025-04-13 23:44:16,091 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07c075d4/d1c154fe6ddb4e6c898b252c40a95383/FLAGfc719f311 [2025-04-13 23:44:16,338 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:44:16,339 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-6.i [2025-04-13 23:44:16,351 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07c075d4/d1c154fe6ddb4e6c898b252c40a95383/FLAGfc719f311 [2025-04-13 23:44:17,141 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07c075d4/d1c154fe6ddb4e6c898b252c40a95383 [2025-04-13 23:44:17,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:44:17,144 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:44:17,146 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,146 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:44:17,151 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:44:17,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44a3d5ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17, skipping insertion in model container [2025-04-13 23:44:17,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,180 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:44:17,516 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/fib_safe-6.i[30241,30254] [2025-04-13 23:44:17,548 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,565 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:44:17,626 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/fib_safe-6.i[30241,30254] [2025-04-13 23:44:17,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,659 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:44:17,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17 WrapperNode [2025-04-13 23:44:17,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:44:17,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:44:17,666 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,686 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,701 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 23:44:17,701 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,702 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,702 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:44:17,702 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:44:17,707 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,708 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,712 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,724 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]. [2025-04-13 23:44:17,725 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,726 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,729 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,730 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,734 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,735 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,737 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,738 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:44:17,738 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:44:17,738 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:44:17,739 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:17,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:17,772 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) [2025-04-13 23:44:17,776 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 [2025-04-13 23:44:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:44:17,792 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:44:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:44:17,792 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:44:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 23:44:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:44:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:44:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 23:44:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:44:17,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:44:17,793 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-13 23:44:17,891 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:44:17,893 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:44:18,034 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:44:18,035 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:44:18,035 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:44:18,139 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:18,144 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:18,151 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:44:18,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:44:18 BoogieIcfgContainer [2025-04-13 23:44:18,152 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:44:18,153 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:44:18,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:44:18,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:44:18,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:44:17" (1/3) ... [2025-04-13 23:44:18,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513cf726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:44:18, skipping insertion in model container [2025-04-13 23:44:18,157 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17" (2/3) ... [2025-04-13 23:44:18,157 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@513cf726 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.04 11:44:18, skipping insertion in model container [2025-04-13 23:44:18,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:44:18" (3/3) ... [2025-04-13 23:44:18,158 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2025-04-13 23:44:18,169 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:44:18,170 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_safe-6.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 23:44:18,171 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:44:18,209 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:44:18,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:18,261 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 23:44:18,263 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:18,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 23 events. 5/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 20. Up to 2 conditions per place. [2025-04-13 23:44:18,265 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:18,270 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 23:44:18,278 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:44:18,286 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;@1d1e76d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:44:18,286 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 23:44:18,297 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:44:18,297 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 23:44:18,297 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:18,297 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,298 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,298 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:18,304 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1578653316, now seen corresponding path program 1 times [2025-04-13 23:44:18,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,310 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560449130] [2025-04-13 23:44:18,311 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,397 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 23:44:18,418 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 23:44:18,418 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,418 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,512 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560449130] [2025-04-13 23:44:18,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560449130] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:44:18,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:44:18,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:44:18,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254365666] [2025-04-13 23:44:18,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,521 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:44:18,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,540 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:44:18,540 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:44:18,541 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2025-04-13 23:44:18,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,682 INFO L116 PetriNetUnfolderBase]: 233/357 cut-off events. [2025-04-13 23:44:18,683 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:44:18,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 357 events. 233/357 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 986 event pairs, 39 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 712. Up to 257 conditions per place. [2025-04-13 23:44:18,700 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 27 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2025-04-13 23:44:18,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,701 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:44:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:44:18,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-04-13 23:44:18,709 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-04-13 23:44:18,710 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 41 transitions. [2025-04-13 23:44:18,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 30 transitions, 124 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-13 23:44:18,717 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=26, PETRI_TRANSITIONS=21} [2025-04-13 23:44:18,722 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 23:44:18,722 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,722 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2025-04-13 23:44:18,722 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,723 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,723 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:44:18,723 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:18,723 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576751, now seen corresponding path program 1 times [2025-04-13 23:44:18,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,724 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390143802] [2025-04-13 23:44:18,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,733 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,745 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,746 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,815 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390143802] [2025-04-13 23:44:18,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390143802] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:18,815 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696855852] [2025-04-13 23:44:18,815 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:18,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:18,818 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) [2025-04-13 23:44:18,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-13 23:44:18,862 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,878 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,878 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,878 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 23:44:18,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,915 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:18,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696855852] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:18,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:18,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 23:44:18,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071956303] [2025-04-13 23:44:18,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,940 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:44:18,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,940 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:44:18,940 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:44:18,940 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 21 transitions, 56 flow. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2025-04-13 23:44:18,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:19,093 INFO L116 PetriNetUnfolderBase]: 297/453 cut-off events. [2025-04-13 23:44:19,093 INFO L117 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-04-13 23:44:19,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 453 events. 297/453 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1244 event pairs, 39 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 1016. Up to 209 conditions per place. [2025-04-13 23:44:19,098 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 51 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2025-04-13 23:44:19,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:19,099 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:44:19,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:44:19,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2025-04-13 23:44:19,100 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2025-04-13 23:44:19,100 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 71 transitions. [2025-04-13 23:44:19,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:19,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 56 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-13 23:44:19,103 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:19,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=90, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2025-04-13 23:44:19,104 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 23:44:19,104 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:19,104 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 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) [2025-04-13 23:44:19,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:19,104 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:19,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-04-13 23:44:19,309 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,309 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:19,309 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,310 INFO L85 PathProgramCache]: Analyzing trace with hash 328624452, now seen corresponding path program 2 times [2025-04-13 23:44:19,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,310 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289301166] [2025-04-13 23:44:19,310 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:19,324 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:19,343 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:19,344 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:19,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:19,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:19,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289301166] [2025-04-13 23:44:19,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289301166] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:19,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189417824] [2025-04-13 23:44:19,436 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:19,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:19,438 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) [2025-04-13 23:44:19,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-13 23:44:19,483 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:19,502 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:19,502 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:19,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,503 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 23:44:19,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:19,523 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:19,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189417824] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:19,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:19,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:44:19,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338840329] [2025-04-13 23:44:19,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:19,578 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:44:19,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:19,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:44:19,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:44:19,579 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:19,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 90 flow. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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) [2025-04-13 23:44:19,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:19,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:19,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:19,783 INFO L116 PetriNetUnfolderBase]: 489/741 cut-off events. [2025-04-13 23:44:19,783 INFO L117 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2025-04-13 23:44:19,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1965 conditions, 741 events. 489/741 cut-off events. For 388/388 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2115 event pairs, 39 based on Foata normal form. 96/715 useless extension candidates. Maximal degree in co-relation 1944. Up to 209 conditions per place. [2025-04-13 23:44:19,787 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 99 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2025-04-13 23:44:19,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,787 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:44:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:44:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-04-13 23:44:19,789 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-04-13 23:44:19,789 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 140 transitions. [2025-04-13 23:44:19,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 110 transitions, 492 flow, removed 6 selfloop flow, removed 1 redundant places. [2025-04-13 23:44:19,792 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,792 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=160, PETRI_PLACES=48, PETRI_TRANSITIONS=30} [2025-04-13 23:44:19,793 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 23:44:19,793 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,793 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 13 states have internal predecessors, (49), 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) [2025-04-13 23:44:19,793 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:19,793 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:19,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-13 23:44:19,997 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 [2025-04-13 23:44:19,997 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:19,998 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,998 INFO L85 PathProgramCache]: Analyzing trace with hash -2090552988, now seen corresponding path program 3 times [2025-04-13 23:44:19,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,998 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352493544] [2025-04-13 23:44:19,998 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:20,007 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:20,042 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:20,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:20,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:20,236 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:20,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:20,236 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352493544] [2025-04-13 23:44:20,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352493544] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:20,236 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488192360] [2025-04-13 23:44:20,236 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:20,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:20,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:20,239 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) [2025-04-13 23:44:20,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-13 23:44:20,282 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:20,307 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:20,308 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:20,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:20,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 23:44:20,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:20,363 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:20,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488192360] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:20,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:20,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2025-04-13 23:44:20,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033995302] [2025-04-13 23:44:20,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:20,505 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-13 23:44:20,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:20,506 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-13 23:44:20,506 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2025-04-13 23:44:20,506 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:20,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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) [2025-04-13 23:44:20,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:20,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:20,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:20,782 INFO L116 PetriNetUnfolderBase]: 617/933 cut-off events. [2025-04-13 23:44:20,782 INFO L117 PetriNetUnfolderBase]: For 2884/2884 co-relation queries the response was YES. [2025-04-13 23:44:20,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2820 conditions, 933 events. 617/933 cut-off events. For 2884/2884 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2684 event pairs, 39 based on Foata normal form. 64/843 useless extension candidates. Maximal degree in co-relation 2792. Up to 209 conditions per place. [2025-04-13 23:44:20,789 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 131 selfloop transitions, 15 changer transitions 0/146 dead transitions. [2025-04-13 23:44:20,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 146 transitions, 708 flow [2025-04-13 23:44:20,790 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-13 23:44:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-13 23:44:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 182 transitions. [2025-04-13 23:44:20,791 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.455 [2025-04-13 23:44:20,791 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 16 states and 182 transitions. [2025-04-13 23:44:20,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 146 transitions, 708 flow [2025-04-13 23:44:20,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 146 transitions, 652 flow, removed 23 selfloop flow, removed 5 redundant places. [2025-04-13 23:44:20,802 INFO L231 Difference]: Finished difference. Result has 62 places, 34 transitions, 184 flow [2025-04-13 23:44:20,802 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=184, PETRI_PLACES=62, PETRI_TRANSITIONS=34} [2025-04-13 23:44:20,803 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 37 predicate places. [2025-04-13 23:44:20,803 INFO L485 AbstractCegarLoop]: Abstraction has has 62 places, 34 transitions, 184 flow [2025-04-13 23:44:20,804 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 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) [2025-04-13 23:44:20,804 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:20,804 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:20,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-13 23:44:21,004 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:21,004 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:44:21,005 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:21,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1283828700, now seen corresponding path program 4 times [2025-04-13 23:44:21,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:21,006 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847257845] [2025-04-13 23:44:21,006 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:21,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:21,015 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-04-13 23:44:21,031 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 23:44:21,031 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:21,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:21,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:21,925 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847257845] [2025-04-13 23:44:21,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847257845] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:21,925 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352196139] [2025-04-13 23:44:21,925 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:21,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:21,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:21,927 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) [2025-04-13 23:44:21,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-13 23:44:21,961 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 25 statements into 2 equivalence classes. [2025-04-13 23:44:21,981 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 25 of 25 statements. [2025-04-13 23:44:21,981 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:21,981 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:21,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 53 conjuncts are in the unsatisfiable core [2025-04-13 23:44:21,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:22,702 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:23,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352196139] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:23,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:23,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 57 [2025-04-13 23:44:23,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612705351] [2025-04-13 23:44:23,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:23,494 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2025-04-13 23:44:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:23,495 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2025-04-13 23:44:23,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=2860, Unknown=0, NotChecked=0, Total=3422 [2025-04-13 23:44:23,498 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:23,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 34 transitions, 184 flow. Second operand has 59 states, 59 states have (on average 3.2711864406779663) internal successors, (193), 59 states have internal predecessors, (193), 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) [2025-04-13 23:44:23,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:23,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:23,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:45:06,433 INFO L116 PetriNetUnfolderBase]: 34397/52222 cut-off events. [2025-04-13 23:45:06,433 INFO L117 PetriNetUnfolderBase]: For 211583/211583 co-relation queries the response was YES. [2025-04-13 23:45:06,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163594 conditions, 52222 events. 34397/52222 cut-off events. For 211583/211583 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 345762 event pairs, 1752 based on Foata normal form. 1393/44433 useless extension candidates. Maximal degree in co-relation 163562. Up to 8981 conditions per place. [2025-04-13 23:45:06,729 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 1660 selfloop transitions, 1807 changer transitions 994/4461 dead transitions. [2025-04-13 23:45:06,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 4461 transitions, 31288 flow [2025-04-13 23:45:06,730 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 438 states. [2025-04-13 23:45:06,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2025-04-13 23:45:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 4422 transitions. [2025-04-13 23:45:06,743 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40383561643835614 [2025-04-13 23:45:06,743 INFO L175 Difference]: Start difference. First operand has 62 places, 34 transitions, 184 flow. Second operand 438 states and 4422 transitions. [2025-04-13 23:45:06,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 4461 transitions, 31288 flow [2025-04-13 23:45:07,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 4461 transitions, 26152 flow, removed 2052 selfloop flow, removed 11 redundant places. [2025-04-13 23:45:07,179 INFO L231 Difference]: Finished difference. Result has 703 places, 1899 transitions, 12050 flow [2025-04-13 23:45:07,180 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=438, PETRI_FLOW=12050, PETRI_PLACES=703, PETRI_TRANSITIONS=1899} [2025-04-13 23:45:07,180 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 678 predicate places. [2025-04-13 23:45:07,180 INFO L485 AbstractCegarLoop]: Abstraction has has 703 places, 1899 transitions, 12050 flow [2025-04-13 23:45:07,181 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.2711864406779663) internal successors, (193), 59 states have internal predecessors, (193), 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) [2025-04-13 23:45:07,181 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:45:07,181 INFO L206 CegarLoopForPetriNet]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:45:07,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-13 23:45:07,381 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:45:07,381 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-13 23:45:07,382 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:45:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1685309693, now seen corresponding path program 1 times [2025-04-13 23:45:07,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:45:07,382 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168145816] [2025-04-13 23:45:07,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:45:07,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:45:07,387 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 23:45:07,395 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 23:45:07,398 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:45:07,398 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:45:08,109 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:45:08,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:45:08,110 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168145816] [2025-04-13 23:45:08,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168145816] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:45:08,110 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512784920] [2025-04-13 23:45:08,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:45:08,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:45:08,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:45:08,112 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) [2025-04-13 23:45:08,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-13 23:45:08,149 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-04-13 23:45:08,170 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-04-13 23:45:08,170 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:45:08,170 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:45:08,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 55 conjuncts are in the unsatisfiable core [2025-04-13 23:45:08,173 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:45:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 78 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:45:08,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:45:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:45:09,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512784920] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:45:09,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:45:09,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 63 [2025-04-13 23:45:09,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830289581] [2025-04-13 23:45:09,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:45:09,622 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2025-04-13 23:45:09,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:45:09,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2025-04-13 23:45:09,624 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=3608, Unknown=0, NotChecked=0, Total=4160 [2025-04-13 23:45:09,624 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:45:09,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 703 places, 1899 transitions, 12050 flow. Second operand has 65 states, 65 states have (on average 3.3384615384615386) internal successors, (217), 65 states have internal predecessors, (217), 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) [2025-04-13 23:45:09,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:45:09,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:45:09,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand