/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_unsafe-10.i -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-13 23:44:14,436 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-13 23:44:14,488 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 23:44:14,492 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-13 23:44:14,492 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-13 23:44:14,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-13 23:44:14,514 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-13 23:44:14,514 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-13 23:44:14,514 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-13 23:44:14,514 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-13 23:44:14,514 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-13 23:44:14,514 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-13 23:44:14,515 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * Use SBE=true [2025-04-13 23:44:14,515 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-13 23:44:14,515 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-13 23:44:14,516 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,516 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-13 23:44:14,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:14,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-13 23:44:14,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-13 23:44:14,517 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 23:44:14,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-13 23:44:14,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-13 23:44:14,767 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-13 23:44:14,768 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-13 23:44:14,770 INFO L274 PluginConnector]: CDTParser initialized [2025-04-13 23:44:14,771 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_unsafe-10.i [2025-04-13 23:44:16,071 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451cdae5e/01396fc4fdad41e99bfbe0ddb4e33aab/FLAG03b1b04cd [2025-04-13 23:44:16,299 INFO L389 CDTParser]: Found 1 translation units. [2025-04-13 23:44:16,300 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_unsafe-10.i [2025-04-13 23:44:16,312 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451cdae5e/01396fc4fdad41e99bfbe0ddb4e33aab/FLAG03b1b04cd [2025-04-13 23:44:17,122 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/451cdae5e/01396fc4fdad41e99bfbe0ddb4e33aab [2025-04-13 23:44:17,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-13 23:44:17,125 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-13 23:44:17,126 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,126 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-13 23:44:17,129 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-13 23:44:17,129 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,130 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11becfa9 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 23:44:17,130 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.04 11:44:17" (1/1) ... [2025-04-13 23:44:17,155 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-13 23:44:17,433 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_unsafe-10.i[30243,30256] [2025-04-13 23:44:17,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,464 INFO L200 MainTranslator]: Completed pre-run [2025-04-13 23:44:17,508 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_unsafe-10.i[30243,30256] [2025-04-13 23:44:17,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-13 23:44:17,540 INFO L204 MainTranslator]: Completed translation [2025-04-13 23:44:17,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.04 11:44:17 WrapperNode [2025-04-13 23:44:17,542 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-13 23:44:17,543 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,543 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-13 23:44:17,543 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-13 23:44:17,548 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 23:44:17,564 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 23:44:17,581 INFO L138 Inliner]: procedures = 164, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2025-04-13 23:44:17,581 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-13 23:44:17,581 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,581 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-13 23:44:17,583 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-13 23:44:17,588 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 23:44:17,588 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 23:44:17,591 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 23:44:17,608 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 23:44:17,608 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 23:44:17,608 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 23:44:17,611 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 23:44:17,612 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 23:44:17,613 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 23:44:17,613 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 23:44:17,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-13 23:44:17,616 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-13 23:44:17,617 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-13 23:44:17,617 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-13 23:44:17,617 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 23:44:17,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-13 23:44:17,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:17,646 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 23:44:17,648 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 23:44:17,663 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2025-04-13 23:44:17,663 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2025-04-13 23:44:17,663 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2025-04-13 23:44:17,663 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2025-04-13 23:44:17,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-13 23:44:17,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-13 23:44:17,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-13 23:44:17,663 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-13 23:44:17,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-13 23:44:17,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-13 23:44:17,664 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 23:44:17,757 INFO L256 CfgBuilder]: Building ICFG [2025-04-13 23:44:17,758 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-13 23:44:17,888 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-13 23:44:17,889 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-13 23:44:17,889 INFO L318 CfgBuilder]: Performing block encoding [2025-04-13 23:44:18,006 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:18,009 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-13 23:44:18,016 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-13 23:44:18,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 13.04 11:44:18 BoogieIcfgContainer [2025-04-13 23:44:18,016 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-13 23:44:18,019 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-13 23:44:18,019 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-13 23:44:18,023 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-13 23:44:18,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.04 11:44:17" (1/3) ... [2025-04-13 23:44:18,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd2f9ad 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 23:44:18,024 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 23:44:18,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bd2f9ad 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 23:44:18,024 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 23:44:18,025 INFO L128 eAbstractionObserver]: Analyzing ICFG fib_unsafe-10.i [2025-04-13 23:44:18,035 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-13 23:44:18,036 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG fib_unsafe-10.i that has 3 procedures, 21 locations, 23 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-13 23:44:18,036 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-13 23:44:18,079 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-13 23:44:18,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:18,126 INFO L116 PetriNetUnfolderBase]: 5/23 cut-off events. [2025-04-13 23:44:18,128 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:18,129 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 23:44:18,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 25 transitions, 58 flow [2025-04-13 23:44:18,132 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 23 transitions, 52 flow [2025-04-13 23:44:18,139 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-13 23:44:18,148 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;@247c3379, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-13 23:44:18,148 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-13 23:44:18,154 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-13 23:44:18,154 INFO L116 PetriNetUnfolderBase]: 5/21 cut-off events. [2025-04-13 23:44:18,154 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-13 23:44:18,154 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,155 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,155 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 23:44:18,171 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1578653316, now seen corresponding path program 1 times [2025-04-13 23:44:18,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,176 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618960904] [2025-04-13 23:44:18,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-13 23:44:18,265 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-13 23:44:18,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,266 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,385 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 23:44:18,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,385 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618960904] [2025-04-13 23:44:18,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618960904] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-13 23:44:18,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-13 23:44:18,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-13 23:44:18,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781685460] [2025-04-13 23:44:18,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,393 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-13 23:44:18,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,412 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-13 23:44:18,412 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-13 23:44:18,413 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,414 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 23:44:18,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,533 INFO L116 PetriNetUnfolderBase]: 233/357 cut-off events. [2025-04-13 23:44:18,534 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-13 23:44:18,535 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 23:44:18,538 INFO L140 encePairwiseOnDemand]: 20/25 looper letters, 27 selfloop transitions, 2 changer transitions 1/30 dead transitions. [2025-04-13 23:44:18,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,540 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-13 23:44:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-13 23:44:18,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 41 transitions. [2025-04-13 23:44:18,548 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-04-13 23:44:18,549 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 52 flow. Second operand 3 states and 41 transitions. [2025-04-13 23:44:18,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 126 flow [2025-04-13 23:44:18,552 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 23:44:18,553 INFO L231 Difference]: Finished difference. Result has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,555 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 23:44:18,557 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2025-04-13 23:44:18,557 INFO L485 AbstractCegarLoop]: Abstraction has has 26 places, 21 transitions, 56 flow [2025-04-13 23:44:18,557 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 23:44:18,557 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,557 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,558 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-13 23:44:18,558 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 23:44:18,558 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1693576751, now seen corresponding path program 1 times [2025-04-13 23:44:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:18,558 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083411599] [2025-04-13 23:44:18,559 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:18,572 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,577 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,577 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,577 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,631 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 23:44:18,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:18,631 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083411599] [2025-04-13 23:44:18,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083411599] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:18,631 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755145548] [2025-04-13 23:44:18,631 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:44:18,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:18,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:18,634 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 23:44:18,635 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 23:44:18,682 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-13 23:44:18,697 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-13 23:44:18,697 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:44:18,697 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:18,699 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-13 23:44:18,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:18,722 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 23:44:18,722 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:18,736 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 23:44:18,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755145548] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:18,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:18,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-04-13 23:44:18,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963601892] [2025-04-13 23:44:18,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:18,738 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-13 23:44:18,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:18,738 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-13 23:44:18,738 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2025-04-13 23:44:18,738 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:18,738 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 23:44:18,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:18,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:18,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:18,880 INFO L116 PetriNetUnfolderBase]: 297/453 cut-off events. [2025-04-13 23:44:18,880 INFO L117 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-04-13 23:44:18,883 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 23:44:18,898 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 51 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2025-04-13 23:44:18,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,899 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-13 23:44:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-13 23:44:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 71 transitions. [2025-04-13 23:44:18,900 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47333333333333333 [2025-04-13 23:44:18,900 INFO L175 Difference]: Start difference. First operand has 26 places, 21 transitions, 56 flow. Second operand 6 states and 71 transitions. [2025-04-13 23:44:18,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 56 transitions, 244 flow [2025-04-13 23:44:18,901 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 23:44:18,901 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,902 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 23:44:18,902 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 7 predicate places. [2025-04-13 23:44:18,902 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 90 flow [2025-04-13 23:44:18,902 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 23:44:18,902 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:18,902 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:18,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-13 23:44:19,107 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 23:44:19,107 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 23:44:19,107 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 328624452, now seen corresponding path program 2 times [2025-04-13 23:44:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,108 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587158124] [2025-04-13 23:44:19,108 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:19,117 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:19,136 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:19,137 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:19,137 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,248 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 23:44:19,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:19,249 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587158124] [2025-04-13 23:44:19,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587158124] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:19,249 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681269817] [2025-04-13 23:44:19,249 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-13 23:44:19,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:19,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:19,251 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 23:44:19,253 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 23:44:19,292 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-13 23:44:19,311 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-13 23:44:19,311 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-13 23:44:19,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:19,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-04-13 23:44:19,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:19,331 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 23:44:19,331 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:19,395 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 23:44:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681269817] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:19,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-04-13 23:44:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480066851] [2025-04-13 23:44:19,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:19,395 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-13 23:44:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:19,396 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-13 23:44:19,396 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2025-04-13 23:44:19,396 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:19,396 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 23:44:19,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:19,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:19,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:19,599 INFO L116 PetriNetUnfolderBase]: 489/741 cut-off events. [2025-04-13 23:44:19,599 INFO L117 PetriNetUnfolderBase]: For 388/388 co-relation queries the response was YES. [2025-04-13 23:44:19,600 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 23:44:19,602 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 99 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2025-04-13 23:44:19,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,603 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2025-04-13 23:44:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2025-04-13 23:44:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2025-04-13 23:44:19,604 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2025-04-13 23:44:19,604 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 90 flow. Second operand 12 states and 140 transitions. [2025-04-13 23:44:19,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 110 transitions, 506 flow [2025-04-13 23:44:19,606 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 23:44:19,607 INFO L231 Difference]: Finished difference. Result has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,607 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 23:44:19,607 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2025-04-13 23:44:19,607 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 30 transitions, 160 flow [2025-04-13 23:44:19,608 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 23:44:19,608 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:19,608 INFO L206 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:19,614 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 23:44:19,812 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 23:44:19,812 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 23:44:19,813 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash -2090552988, now seen corresponding path program 3 times [2025-04-13 23:44:19,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:19,813 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428305874] [2025-04-13 23:44:19,813 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:19,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:19,822 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:19,858 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:19,858 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:19,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:20,042 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 23:44:20,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:20,043 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428305874] [2025-04-13 23:44:20,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428305874] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:20,043 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198010010] [2025-04-13 23:44:20,043 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-13 23:44:20,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:20,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:20,046 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 23:44:20,048 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 23:44:20,085 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 21 statements into 6 equivalence classes. [2025-04-13 23:44:20,105 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) and asserted 21 of 21 statements. [2025-04-13 23:44:20,106 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2025-04-13 23:44:20,106 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:20,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-13 23:44:20,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:20,139 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 23:44:20,139 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:20,307 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 23:44:20,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198010010] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:20,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:20,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2025-04-13 23:44:20,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277277951] [2025-04-13 23:44:20,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:20,308 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-13 23:44:20,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:20,309 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-13 23:44:20,309 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2025-04-13 23:44:20,309 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:20,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 30 transitions, 160 flow. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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 23:44:20,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:20,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:20,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:44:20,684 INFO L116 PetriNetUnfolderBase]: 873/1317 cut-off events. [2025-04-13 23:44:20,684 INFO L117 PetriNetUnfolderBase]: For 7492/7492 co-relation queries the response was YES. [2025-04-13 23:44:20,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3972 conditions, 1317 events. 873/1317 cut-off events. For 7492/7492 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3837 event pairs, 39 based on Foata normal form. 192/1291 useless extension candidates. Maximal degree in co-relation 3944. Up to 337 conditions per place. [2025-04-13 23:44:20,694 INFO L140 encePairwiseOnDemand]: 22/25 looper letters, 195 selfloop transitions, 23 changer transitions 0/218 dead transitions. [2025-04-13 23:44:20,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 218 transitions, 1044 flow [2025-04-13 23:44:20,694 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-13 23:44:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-13 23:44:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 278 transitions. [2025-04-13 23:44:20,698 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2025-04-13 23:44:20,698 INFO L175 Difference]: Start difference. First operand has 48 places, 30 transitions, 160 flow. Second operand 24 states and 278 transitions. [2025-04-13 23:44:20,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 218 transitions, 1044 flow [2025-04-13 23:44:20,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 218 transitions, 972 flow, removed 31 selfloop flow, removed 5 redundant places. [2025-04-13 23:44:20,709 INFO L231 Difference]: Finished difference. Result has 78 places, 42 transitions, 280 flow [2025-04-13 23:44:20,710 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=24, PETRI_FLOW=280, PETRI_PLACES=78, PETRI_TRANSITIONS=42} [2025-04-13 23:44:20,711 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 53 predicate places. [2025-04-13 23:44:20,711 INFO L485 AbstractCegarLoop]: Abstraction has has 78 places, 42 transitions, 280 flow [2025-04-13 23:44:20,712 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 25 states have internal predecessors, (85), 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 23:44:20,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:44:20,712 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:44:20,718 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 23:44:20,912 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 23:44:20,913 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 23:44:20,913 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:44:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1826129500, now seen corresponding path program 4 times [2025-04-13 23:44:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:44:20,913 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073004675] [2025-04-13 23:44:20,913 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:44:20,924 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-04-13 23:44:20,958 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-13 23:44:20,959 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:20,959 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:22,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:44:22,328 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073004675] [2025-04-13 23:44:22,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073004675] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:44:22,328 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171213242] [2025-04-13 23:44:22,328 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-13 23:44:22,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:44:22,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:44:22,330 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 23:44:22,331 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 23:44:22,370 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 33 statements into 2 equivalence classes. [2025-04-13 23:44:22,396 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-13 23:44:22,396 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-13 23:44:22,396 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:44:22,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 77 conjuncts are in the unsatisfiable core [2025-04-13 23:44:22,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:44:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 210 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:23,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:44:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:44:25,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171213242] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:44:25,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:44:25,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2025-04-13 23:44:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654684011] [2025-04-13 23:44:25,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:44:25,120 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2025-04-13 23:44:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:44:25,121 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2025-04-13 23:44:25,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1195, Invalid=5611, Unknown=0, NotChecked=0, Total=6806 [2025-04-13 23:44:25,123 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:44:25,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 42 transitions, 280 flow. Second operand has 83 states, 83 states have (on average 3.1927710843373496) internal successors, (265), 83 states have internal predecessors, (265), 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 23:44:25,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:44:25,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:44:25,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-13 23:47:32,164 INFO L116 PetriNetUnfolderBase]: 114051/172738 cut-off events. [2025-04-13 23:47:32,164 INFO L117 PetriNetUnfolderBase]: For 1292259/1292259 co-relation queries the response was YES. [2025-04-13 23:47:32,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 592093 conditions, 172738 events. 114051/172738 cut-off events. For 1292259/1292259 co-relation queries the response was YES. Maximal size of possible extension queue 1633. Compared 1268757 event pairs, 7037 based on Foata normal form. 3571/145825 useless extension candidates. Maximal degree in co-relation 592053. Up to 41668 conditions per place. [2025-04-13 23:47:33,475 INFO L140 encePairwiseOnDemand]: 17/25 looper letters, 3825 selfloop transitions, 5995 changer transitions 2552/12372 dead transitions. [2025-04-13 23:47:33,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1113 places, 12372 transitions, 105704 flow [2025-04-13 23:47:33,475 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1036 states. [2025-04-13 23:47:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1036 states. [2025-04-13 23:47:33,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 10553 transitions. [2025-04-13 23:47:33,501 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.40745173745173746 [2025-04-13 23:47:33,501 INFO L175 Difference]: Start difference. First operand has 78 places, 42 transitions, 280 flow. Second operand 1036 states and 10553 transitions. [2025-04-13 23:47:33,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1113 places, 12372 transitions, 105704 flow [2025-04-13 23:47:36,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1102 places, 12372 transitions, 80980 flow, removed 11694 selfloop flow, removed 11 redundant places. [2025-04-13 23:47:36,569 INFO L231 Difference]: Finished difference. Result has 1621 places, 6125 transitions, 38856 flow [2025-04-13 23:47:36,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1036, PETRI_FLOW=38856, PETRI_PLACES=1621, PETRI_TRANSITIONS=6125} [2025-04-13 23:47:36,575 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 1596 predicate places. [2025-04-13 23:47:36,575 INFO L485 AbstractCegarLoop]: Abstraction has has 1621 places, 6125 transitions, 38856 flow [2025-04-13 23:47:36,575 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.1927710843373496) internal successors, (265), 83 states have internal predecessors, (265), 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 23:47:36,575 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-13 23:47:36,575 INFO L206 CegarLoopForPetriNet]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-13 23:47:36,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-13 23:47:36,776 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 23:47:36,776 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 23:47:36,779 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-13 23:47:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 2014127741, now seen corresponding path program 1 times [2025-04-13 23:47:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-13 23:47:36,780 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566457600] [2025-04-13 23:47:36,780 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:36,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-13 23:47:36,796 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-04-13 23:47:36,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 23:47:36,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:36,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:38,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-13 23:47:38,707 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566457600] [2025-04-13 23:47:38,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566457600] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-13 23:47:38,707 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759041635] [2025-04-13 23:47:38,707 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-13 23:47:38,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-13 23:47:38,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-13 23:47:38,709 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 23:47:38,711 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 23:47:38,744 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-04-13 23:47:38,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-04-13 23:47:38,769 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-13 23:47:38,769 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-13 23:47:38,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 79 conjuncts are in the unsatisfiable core [2025-04-13 23:47:38,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-13 23:47:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 210 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:39,831 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-13 23:47:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-13 23:47:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759041635] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-13 23:47:41,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-13 23:47:41,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2025-04-13 23:47:41,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429696727] [2025-04-13 23:47:41,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-13 23:47:41,035 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2025-04-13 23:47:41,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-13 23:47:41,036 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2025-04-13 23:47:41,038 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=6749, Unknown=0, NotChecked=0, Total=7832 [2025-04-13 23:47:41,038 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 25 [2025-04-13 23:47:41,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1621 places, 6125 transitions, 38856 flow. Second operand has 89 states, 89 states have (on average 3.247191011235955) internal successors, (289), 89 states have internal predecessors, (289), 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 23:47:41,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-13 23:47:41,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 25 [2025-04-13 23:47:41,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand