/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/weaver/clever.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.3.0-wip.dk.cfg-lbe-improvements-94356ea-m [2025-04-14 00:46:49,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-14 00:46:49,847 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../benchexec/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2025-04-14 00:46:49,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-14 00:46:49,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-14 00:46:49,875 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-14 00:46:49,876 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-14 00:46:49,876 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-14 00:46:49,876 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-14 00:46:49,876 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-14 00:46:49,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-14 00:46:49,876 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-14 00:46:49,876 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-14 00:46:49,876 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Use SBE=true [2025-04-14 00:46:49,877 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-14 00:46:49,877 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-14 00:46:49,877 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:46:49,878 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:46:49,878 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-14 00:46:49,878 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-14 00:46:49,879 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Automaton type used in concurrency analysis -> PETRI_NET Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.preprocessor: Replace while statements and if-then-else statements -> false [2025-04-14 00:46:50,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-14 00:46:50,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-14 00:46:50,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-14 00:46:50,130 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-14 00:46:50,131 INFO L274 PluginConnector]: CDTParser initialized [2025-04-14 00:46:50,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2025-04-14 00:46:51,458 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0690cc5cb/76ee0fb3ebec46b3934651020b3e75cc/FLAGd8e959e52 [2025-04-14 00:46:51,653 INFO L389 CDTParser]: Found 1 translation units. [2025-04-14 00:46:51,654 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2025-04-14 00:46:51,659 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0690cc5cb/76ee0fb3ebec46b3934651020b3e75cc/FLAGd8e959e52 [2025-04-14 00:46:52,509 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0690cc5cb/76ee0fb3ebec46b3934651020b3e75cc [2025-04-14 00:46:52,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-14 00:46:52,512 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2025-04-14 00:46:52,513 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-14 00:46:52,513 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-14 00:46:52,518 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-14 00:46:52,519 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e96e01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52, skipping insertion in model container [2025-04-14 00:46:52,520 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,530 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-14 00:46:52,663 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2159,2172] [2025-04-14 00:46:52,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:46:52,673 INFO L200 MainTranslator]: Completed pre-run [2025-04-14 00:46:52,699 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c[2159,2172] [2025-04-14 00:46:52,700 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-04-14 00:46:52,710 INFO L204 MainTranslator]: Completed translation [2025-04-14 00:46:52,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52 WrapperNode [2025-04-14 00:46:52,711 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-14 00:46:52,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-14 00:46:52,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-14 00:46:52,712 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-14 00:46:52,716 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,722 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,734 INFO L138 Inliner]: procedures = 18, calls = 11, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 72 [2025-04-14 00:46:52,734 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-14 00:46:52,734 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-14 00:46:52,734 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-14 00:46:52,735 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-14 00:46:52,739 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,740 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,748 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2025-04-14 00:46:52,748 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,748 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,750 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,751 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,751 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,752 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-14 00:46:52,754 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-04-14 00:46:52,754 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-04-14 00:46:52,754 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-04-14 00:46:52,755 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (1/1) ... [2025-04-14 00:46:52,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-14 00:46:52,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:46:52,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-04-14 00:46:52,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-04-14 00:46:52,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-14 00:46:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-14 00:46:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-14 00:46:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-14 00:46:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-14 00:46:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-14 00:46:52,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-14 00:46:52,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-14 00:46:52,795 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-14 00:46:52,848 INFO L256 CfgBuilder]: Building ICFG [2025-04-14 00:46:52,849 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-14 00:46:52,973 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-14 00:46:52,974 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-14 00:46:52,974 INFO L318 CfgBuilder]: Performing block encoding [2025-04-14 00:46:53,141 WARN L179 LargeBlockEncoding]: Complex 2:2 sequential composition. Such compositions can cause exponential blowup and should not occur in structured programs. [2025-04-14 00:46:53,148 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-14 00:46:53,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:46:53 BoogieIcfgContainer [2025-04-14 00:46:53,149 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-04-14 00:46:53,150 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-14 00:46:53,150 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-14 00:46:53,154 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-14 00:46:53,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.04 12:46:52" (1/3) ... [2025-04-14 00:46:53,155 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7eed52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:46:53, skipping insertion in model container [2025-04-14 00:46:53,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.04 12:46:52" (2/3) ... [2025-04-14 00:46:53,156 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b7eed52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.04 12:46:53, skipping insertion in model container [2025-04-14 00:46:53,156 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.04 12:46:53" (3/3) ... [2025-04-14 00:46:53,157 INFO L128 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2025-04-14 00:46:53,166 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-14 00:46:53,167 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG clever.wvr.c that has 3 procedures, 16 locations, 16 edges, 1 initial locations, 3 loop locations, and 1 error locations. [2025-04-14 00:46:53,168 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-14 00:46:53,208 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-14 00:46:53,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 22 places, 18 transitions, 50 flow [2025-04-14 00:46:53,259 INFO L116 PetriNetUnfolderBase]: 3/16 cut-off events. [2025-04-14 00:46:53,262 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 00:46:53,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 3/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2025-04-14 00:46:53,264 INFO L82 GeneralOperation]: Start removeDead. Operand has 22 places, 18 transitions, 50 flow [2025-04-14 00:46:53,266 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 19 places, 15 transitions, 42 flow [2025-04-14 00:46:53,274 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-14 00:46:53,286 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;@c47bb52, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-14 00:46:53,286 INFO L341 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2025-04-14 00:46:53,294 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-14 00:46:53,294 INFO L116 PetriNetUnfolderBase]: 3/14 cut-off events. [2025-04-14 00:46:53,294 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-14 00:46:53,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:53,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:53,295 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:53,299 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash 757726774, now seen corresponding path program 1 times [2025-04-14 00:46:53,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:53,304 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057167434] [2025-04-14 00:46:53,304 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:46:53,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:53,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-14 00:46:53,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-14 00:46:53,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:46:53,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:53,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:53,623 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057167434] [2025-04-14 00:46:53,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057167434] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:46:53,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:46:53,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-04-14 00:46:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586157760] [2025-04-14 00:46:53,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:46:53,631 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-14 00:46:53,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:46:53,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-14 00:46:53,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-14 00:46:53,648 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:46:53,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:53,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:46:53,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:46:53,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:46:53,734 INFO L116 PetriNetUnfolderBase]: 73/123 cut-off events. [2025-04-14 00:46:53,734 INFO L117 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-04-14 00:46:53,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 123 events. 73/123 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 325 event pairs, 14 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 221. Up to 79 conditions per place. [2025-04-14 00:46:53,736 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 21 selfloop transitions, 3 changer transitions 1/26 dead transitions. [2025-04-14 00:46:53,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 26 transitions, 123 flow [2025-04-14 00:46:53,739 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-14 00:46:53,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-14 00:46:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 35 transitions. [2025-04-14 00:46:53,747 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6481481481481481 [2025-04-14 00:46:53,748 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 35 transitions. [2025-04-14 00:46:53,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 26 transitions, 123 flow [2025-04-14 00:46:53,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-14 00:46:53,751 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 53 flow [2025-04-14 00:46:53,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2025-04-14 00:46:53,755 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2025-04-14 00:46:53,755 INFO L485 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 53 flow [2025-04-14 00:46:53,755 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:53,755 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:53,755 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:53,756 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-14 00:46:53,756 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:53,756 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:53,756 INFO L85 PathProgramCache]: Analyzing trace with hash -671933553, now seen corresponding path program 1 times [2025-04-14 00:46:53,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:53,756 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398694160] [2025-04-14 00:46:53,756 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:46:53,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:53,762 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-14 00:46:53,768 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-14 00:46:53,768 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:46:53,768 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:53,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:53,820 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398694160] [2025-04-14 00:46:53,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398694160] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:46:53,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:46:53,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 00:46:53,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507759338] [2025-04-14 00:46:53,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:46:53,821 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:46:53,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:46:53,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:46:53,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 00:46:53,821 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:46:53,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:53,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:46:53,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:46:53,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:46:53,939 INFO L116 PetriNetUnfolderBase]: 85/155 cut-off events. [2025-04-14 00:46:53,939 INFO L117 PetriNetUnfolderBase]: For 35/39 co-relation queries the response was YES. [2025-04-14 00:46:53,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 155 events. 85/155 cut-off events. For 35/39 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 504 event pairs, 9 based on Foata normal form. 7/147 useless extension candidates. Maximal degree in co-relation 109. Up to 52 conditions per place. [2025-04-14 00:46:53,940 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 30 selfloop transitions, 8 changer transitions 2/41 dead transitions. [2025-04-14 00:46:53,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 41 transitions, 202 flow [2025-04-14 00:46:53,942 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:46:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:46:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2025-04-14 00:46:53,943 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2025-04-14 00:46:53,943 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 53 flow. Second operand 5 states and 52 transitions. [2025-04-14 00:46:53,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 41 transitions, 202 flow [2025-04-14 00:46:53,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 41 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-14 00:46:53,944 INFO L231 Difference]: Finished difference. Result has 23 places, 24 transitions, 109 flow [2025-04-14 00:46:53,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=109, PETRI_PLACES=23, PETRI_TRANSITIONS=24} [2025-04-14 00:46:53,945 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2025-04-14 00:46:53,945 INFO L485 AbstractCegarLoop]: Abstraction has has 23 places, 24 transitions, 109 flow [2025-04-14 00:46:53,945 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:53,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:53,945 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:53,945 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-14 00:46:53,945 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:53,946 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:53,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1801839779, now seen corresponding path program 2 times [2025-04-14 00:46:53,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:53,947 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039179648] [2025-04-14 00:46:53,947 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:46:53,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:53,954 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-04-14 00:46:53,968 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-04-14 00:46:53,968 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:46:53,968 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:54,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:54,042 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039179648] [2025-04-14 00:46:54,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039179648] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:46:54,042 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625146026] [2025-04-14 00:46:54,042 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:46:54,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:46:54,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:46:54,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:46:54,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-14 00:46:54,080 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-04-14 00:46:54,095 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-04-14 00:46:54,095 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:46:54,095 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:54,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-04-14 00:46:54,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:46:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:54,167 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:46:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:54,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625146026] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:46:54,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:46:54,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2025-04-14 00:46:54,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551903136] [2025-04-14 00:46:54,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:46:54,190 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-14 00:46:54,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:46:54,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-14 00:46:54,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-04-14 00:46:54,191 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:46:54,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 24 transitions, 109 flow. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:54,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:46:54,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:46:54,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:46:54,289 INFO L116 PetriNetUnfolderBase]: 84/150 cut-off events. [2025-04-14 00:46:54,289 INFO L117 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-04-14 00:46:54,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 150 events. 84/150 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 475 event pairs, 9 based on Foata normal form. 6/153 useless extension candidates. Maximal degree in co-relation 153. Up to 58 conditions per place. [2025-04-14 00:46:54,291 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 27 selfloop transitions, 16 changer transitions 6/50 dead transitions. [2025-04-14 00:46:54,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 50 transitions, 307 flow [2025-04-14 00:46:54,291 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-14 00:46:54,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-14 00:46:54,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 64 transitions. [2025-04-14 00:46:54,291 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5079365079365079 [2025-04-14 00:46:54,292 INFO L175 Difference]: Start difference. First operand has 23 places, 24 transitions, 109 flow. Second operand 7 states and 64 transitions. [2025-04-14 00:46:54,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 50 transitions, 307 flow [2025-04-14 00:46:54,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 50 transitions, 307 flow, removed 0 selfloop flow, removed 0 redundant places. [2025-04-14 00:46:54,293 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 199 flow [2025-04-14 00:46:54,293 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=199, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2025-04-14 00:46:54,294 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 13 predicate places. [2025-04-14 00:46:54,294 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 199 flow [2025-04-14 00:46:54,294 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:54,294 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:54,294 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:54,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-14 00:46:54,498 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:46:54,498 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:54,498 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:54,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1630405644, now seen corresponding path program 1 times [2025-04-14 00:46:54,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:54,499 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752636389] [2025-04-14 00:46:54,499 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:46:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:54,504 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-14 00:46:54,508 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:46:54,508 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:46:54,508 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:54,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:46:54,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:54,545 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752636389] [2025-04-14 00:46:54,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752636389] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:46:54,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:46:54,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 00:46:54,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658715318] [2025-04-14 00:46:54,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:46:54,545 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:46:54,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:46:54,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:46:54,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 00:46:54,549 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:46:54,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:54,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:46:54,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:46:54,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:46:54,598 INFO L116 PetriNetUnfolderBase]: 70/129 cut-off events. [2025-04-14 00:46:54,598 INFO L117 PetriNetUnfolderBase]: For 154/158 co-relation queries the response was YES. [2025-04-14 00:46:54,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 129 events. 70/129 cut-off events. For 154/158 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 354 event pairs, 1 based on Foata normal form. 11/138 useless extension candidates. Maximal degree in co-relation 225. Up to 73 conditions per place. [2025-04-14 00:46:54,599 INFO L140 encePairwiseOnDemand]: 14/18 looper letters, 35 selfloop transitions, 6 changer transitions 0/42 dead transitions. [2025-04-14 00:46:54,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 339 flow [2025-04-14 00:46:54,599 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-14 00:46:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-14 00:46:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 39 transitions. [2025-04-14 00:46:54,600 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-04-14 00:46:54,600 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 199 flow. Second operand 4 states and 39 transitions. [2025-04-14 00:46:54,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 339 flow [2025-04-14 00:46:54,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 42 transitions, 309 flow, removed 15 selfloop flow, removed 0 redundant places. [2025-04-14 00:46:54,602 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 205 flow [2025-04-14 00:46:54,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2025-04-14 00:46:54,603 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 17 predicate places. [2025-04-14 00:46:54,603 INFO L485 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 205 flow [2025-04-14 00:46:54,603 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:54,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:54,603 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:54,603 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-14 00:46:54,603 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:54,603 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:54,604 INFO L85 PathProgramCache]: Analyzing trace with hash -980734731, now seen corresponding path program 1 times [2025-04-14 00:46:54,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:54,604 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942943913] [2025-04-14 00:46:54,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:46:54,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:54,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-14 00:46:54,620 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:46:54,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:46:54,622 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:54,857 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942943913] [2025-04-14 00:46:54,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942943913] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:46:54,857 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902117150] [2025-04-14 00:46:54,857 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:46:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:46:54,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:46:54,859 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:46:54,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-14 00:46:54,887 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-14 00:46:54,898 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:46:54,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:46:54,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:54,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:46:54,901 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:46:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:55,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:46:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902117150] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:46:55,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:46:55,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-04-14 00:46:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366139546] [2025-04-14 00:46:55,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:46:55,140 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:46:55,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:46:55,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:46:55,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:46:55,141 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:46:55,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 205 flow. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:55,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:46:55,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:46:55,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:46:55,349 INFO L116 PetriNetUnfolderBase]: 111/216 cut-off events. [2025-04-14 00:46:55,349 INFO L117 PetriNetUnfolderBase]: For 335/339 co-relation queries the response was YES. [2025-04-14 00:46:55,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 216 events. 111/216 cut-off events. For 335/339 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 772 event pairs, 5 based on Foata normal form. 5/219 useless extension candidates. Maximal degree in co-relation 350. Up to 109 conditions per place. [2025-04-14 00:46:55,351 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 44 selfloop transitions, 20 changer transitions 11/76 dead transitions. [2025-04-14 00:46:55,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 76 transitions, 576 flow [2025-04-14 00:46:55,351 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-14 00:46:55,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-14 00:46:55,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 85 transitions. [2025-04-14 00:46:55,352 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2025-04-14 00:46:55,352 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 205 flow. Second operand 9 states and 85 transitions. [2025-04-14 00:46:55,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 76 transitions, 576 flow [2025-04-14 00:46:55,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 76 transitions, 566 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-14 00:46:55,354 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 366 flow [2025-04-14 00:46:55,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=366, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2025-04-14 00:46:55,355 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 27 predicate places. [2025-04-14 00:46:55,355 INFO L485 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 366 flow [2025-04-14 00:46:55,355 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:55,355 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:55,355 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:55,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-04-14 00:46:55,556 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:46:55,556 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:55,556 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:55,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1796040756, now seen corresponding path program 2 times [2025-04-14 00:46:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:55,557 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774665023] [2025-04-14 00:46:55,557 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:46:55,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:55,561 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-04-14 00:46:55,564 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 13 statements. [2025-04-14 00:46:55,564 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-14 00:46:55,564 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-04-14 00:46:55,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:55,596 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774665023] [2025-04-14 00:46:55,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774665023] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-14 00:46:55,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-14 00:46:55,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-14 00:46:55,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400332626] [2025-04-14 00:46:55,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-14 00:46:55,597 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-14 00:46:55,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:46:55,597 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-14 00:46:55,597 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-14 00:46:55,597 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:46:55,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 366 flow. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:55,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:46:55,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:46:55,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:46:55,662 INFO L116 PetriNetUnfolderBase]: 98/184 cut-off events. [2025-04-14 00:46:55,662 INFO L117 PetriNetUnfolderBase]: For 495/501 co-relation queries the response was YES. [2025-04-14 00:46:55,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 860 conditions, 184 events. 98/184 cut-off events. For 495/501 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 563 event pairs, 13 based on Foata normal form. 3/184 useless extension candidates. Maximal degree in co-relation 832. Up to 65 conditions per place. [2025-04-14 00:46:55,663 INFO L140 encePairwiseOnDemand]: 13/18 looper letters, 38 selfloop transitions, 16 changer transitions 1/56 dead transitions. [2025-04-14 00:46:55,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 56 transitions, 538 flow [2025-04-14 00:46:55,664 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-04-14 00:46:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-04-14 00:46:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2025-04-14 00:46:55,664 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2025-04-14 00:46:55,664 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 366 flow. Second operand 5 states and 46 transitions. [2025-04-14 00:46:55,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 56 transitions, 538 flow [2025-04-14 00:46:55,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 480 flow, removed 19 selfloop flow, removed 5 redundant places. [2025-04-14 00:46:55,671 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 377 flow [2025-04-14 00:46:55,671 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2025-04-14 00:46:55,672 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 28 predicate places. [2025-04-14 00:46:55,673 INFO L485 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 377 flow [2025-04-14 00:46:55,673 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:46:55,673 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:46:55,673 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:46:55,673 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-04-14 00:46:55,673 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:46:55,673 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:46:55,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1907404919, now seen corresponding path program 2 times [2025-04-14 00:46:55,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:46:55,674 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353544736] [2025-04-14 00:46:55,674 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:46:55,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:46:55,679 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-04-14 00:46:55,690 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:46:55,690 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:46:55,690 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:55,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:55,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:46:55,902 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353544736] [2025-04-14 00:46:55,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353544736] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:46:55,902 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110537492] [2025-04-14 00:46:55,903 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:46:55,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:46:55,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:46:55,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:46:55,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-14 00:46:55,935 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-04-14 00:46:55,947 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:46:55,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:46:55,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:46:55,947 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:46:55,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:46:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:46:56,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:00,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110537492] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:00,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:00,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-04-14 00:47:00,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689225441] [2025-04-14 00:47:00,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:00,196 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:47:00,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:00,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:47:00,197 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=102, Unknown=1, NotChecked=0, Total=156 [2025-04-14 00:47:00,199 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:00,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 377 flow. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:00,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:00,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:00,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:00,717 INFO L116 PetriNetUnfolderBase]: 196/371 cut-off events. [2025-04-14 00:47:00,718 INFO L117 PetriNetUnfolderBase]: For 1253/1256 co-relation queries the response was YES. [2025-04-14 00:47:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1742 conditions, 371 events. 196/371 cut-off events. For 1253/1256 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1521 event pairs, 12 based on Foata normal form. 7/377 useless extension candidates. Maximal degree in co-relation 1532. Up to 140 conditions per place. [2025-04-14 00:47:00,721 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 75 selfloop transitions, 40 changer transitions 23/139 dead transitions. [2025-04-14 00:47:00,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 139 transitions, 1295 flow [2025-04-14 00:47:00,721 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-04-14 00:47:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-04-14 00:47:00,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 142 transitions. [2025-04-14 00:47:00,722 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5259259259259259 [2025-04-14 00:47:00,722 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 377 flow. Second operand 15 states and 142 transitions. [2025-04-14 00:47:00,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 139 transitions, 1295 flow [2025-04-14 00:47:00,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 139 transitions, 1242 flow, removed 21 selfloop flow, removed 2 redundant places. [2025-04-14 00:47:00,730 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 769 flow [2025-04-14 00:47:00,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=769, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2025-04-14 00:47:00,732 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 49 predicate places. [2025-04-14 00:47:00,733 INFO L485 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 769 flow [2025-04-14 00:47:00,733 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:00,733 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:00,733 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:00,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-14 00:47:00,937 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:00,937 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:00,937 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:00,938 INFO L85 PathProgramCache]: Analyzing trace with hash 124012823, now seen corresponding path program 3 times [2025-04-14 00:47:00,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:00,938 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364975778] [2025-04-14 00:47:00,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:47:00,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:00,942 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13 statements into 2 equivalence classes. [2025-04-14 00:47:00,947 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:47:00,947 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:47:00,948 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:01,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:01,135 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364975778] [2025-04-14 00:47:01,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364975778] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:01,135 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980245015] [2025-04-14 00:47:01,135 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:47:01,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:01,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:01,137 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:01,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-14 00:47:01,166 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 13 statements into 2 equivalence classes. [2025-04-14 00:47:01,175 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-04-14 00:47:01,176 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:47:01,176 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:01,176 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-14 00:47:01,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:01,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:01,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:01,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:01,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980245015] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:01,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:01,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-04-14 00:47:01,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434297745] [2025-04-14 00:47:01,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:01,439 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-04-14 00:47:01,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:01,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-04-14 00:47:01,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2025-04-14 00:47:01,439 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:01,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 769 flow. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:01,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:01,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:01,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:01,749 INFO L116 PetriNetUnfolderBase]: 229/447 cut-off events. [2025-04-14 00:47:01,749 INFO L117 PetriNetUnfolderBase]: For 1762/1765 co-relation queries the response was YES. [2025-04-14 00:47:01,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2313 conditions, 447 events. 229/447 cut-off events. For 1762/1765 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2030 event pairs, 19 based on Foata normal form. 5/451 useless extension candidates. Maximal degree in co-relation 2238. Up to 179 conditions per place. [2025-04-14 00:47:01,752 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 61 selfloop transitions, 46 changer transitions 14/122 dead transitions. [2025-04-14 00:47:01,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 122 transitions, 1411 flow [2025-04-14 00:47:01,753 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-14 00:47:01,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-14 00:47:01,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 89 transitions. [2025-04-14 00:47:01,753 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2025-04-14 00:47:01,753 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 769 flow. Second operand 10 states and 89 transitions. [2025-04-14 00:47:01,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 122 transitions, 1411 flow [2025-04-14 00:47:01,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 122 transitions, 1309 flow, removed 48 selfloop flow, removed 3 redundant places. [2025-04-14 00:47:01,761 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 945 flow [2025-04-14 00:47:01,761 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=683, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=945, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2025-04-14 00:47:01,762 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 57 predicate places. [2025-04-14 00:47:01,762 INFO L485 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 945 flow [2025-04-14 00:47:01,762 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:01,762 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:01,762 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:01,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-14 00:47:01,962 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:01,963 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:01,963 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:01,963 INFO L85 PathProgramCache]: Analyzing trace with hash -814732022, now seen corresponding path program 1 times [2025-04-14 00:47:01,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:01,964 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786807653] [2025-04-14 00:47:01,964 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:47:01,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:01,967 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:47:01,973 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:01,973 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:47:01,973 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:02,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:02,225 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786807653] [2025-04-14 00:47:02,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786807653] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:02,226 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171464263] [2025-04-14 00:47:02,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-14 00:47:02,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:02,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:02,229 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:02,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-14 00:47:02,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:47:02,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:02,286 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:47:02,286 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:02,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:47:02,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:02,764 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:07,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171464263] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:07,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:07,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-04-14 00:47:07,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580935833] [2025-04-14 00:47:07,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:07,142 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 00:47:07,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:07,143 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 00:47:07,143 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=265, Unknown=1, NotChecked=0, Total=342 [2025-04-14 00:47:07,143 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:07,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 945 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:07,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:07,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:07,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:07,874 INFO L116 PetriNetUnfolderBase]: 278/548 cut-off events. [2025-04-14 00:47:07,874 INFO L117 PetriNetUnfolderBase]: For 2254/2257 co-relation queries the response was YES. [2025-04-14 00:47:07,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 548 events. 278/548 cut-off events. For 2254/2257 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2664 event pairs, 2 based on Foata normal form. 7/554 useless extension candidates. Maximal degree in co-relation 2860. Up to 205 conditions per place. [2025-04-14 00:47:07,879 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 62 selfloop transitions, 77 changer transitions 24/164 dead transitions. [2025-04-14 00:47:07,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 164 transitions, 1826 flow [2025-04-14 00:47:07,879 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 00:47:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 00:47:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 165 transitions. [2025-04-14 00:47:07,880 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2025-04-14 00:47:07,880 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 945 flow. Second operand 21 states and 165 transitions. [2025-04-14 00:47:07,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 164 transitions, 1826 flow [2025-04-14 00:47:07,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 164 transitions, 1710 flow, removed 43 selfloop flow, removed 9 redundant places. [2025-04-14 00:47:07,893 INFO L231 Difference]: Finished difference. Result has 94 places, 106 transitions, 1404 flow [2025-04-14 00:47:07,893 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1404, PETRI_PLACES=94, PETRI_TRANSITIONS=106} [2025-04-14 00:47:07,893 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 75 predicate places. [2025-04-14 00:47:07,894 INFO L485 AbstractCegarLoop]: Abstraction has has 94 places, 106 transitions, 1404 flow [2025-04-14 00:47:07,894 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:07,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:07,894 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:07,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-14 00:47:08,094 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:08,094 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:08,095 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash -909549731, now seen corresponding path program 2 times [2025-04-14 00:47:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:08,095 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346784266] [2025-04-14 00:47:08,095 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:47:08,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:08,098 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:08,112 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:08,113 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:47:08,113 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:08,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:08,343 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346784266] [2025-04-14 00:47:08,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346784266] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:08,343 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522544339] [2025-04-14 00:47:08,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:47:08,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:08,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:08,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:08,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-14 00:47:08,370 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:08,483 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:08,483 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:47:08,483 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:08,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 00:47:08,485 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:09,026 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:09,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522544339] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:09,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:09,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-04-14 00:47:09,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353582577] [2025-04-14 00:47:09,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:09,659 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:47:09,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:09,660 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:47:09,660 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:47:09,660 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:09,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 106 transitions, 1404 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:09,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:09,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:09,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:10,632 INFO L116 PetriNetUnfolderBase]: 311/599 cut-off events. [2025-04-14 00:47:10,633 INFO L117 PetriNetUnfolderBase]: For 2844/2847 co-relation queries the response was YES. [2025-04-14 00:47:10,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3611 conditions, 599 events. 311/599 cut-off events. For 2844/2847 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2903 event pairs, 11 based on Foata normal form. 4/602 useless extension candidates. Maximal degree in co-relation 3489. Up to 348 conditions per place. [2025-04-14 00:47:10,637 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 116 selfloop transitions, 59 changer transitions 8/184 dead transitions. [2025-04-14 00:47:10,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 184 transitions, 2231 flow [2025-04-14 00:47:10,638 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 00:47:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 00:47:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 157 transitions. [2025-04-14 00:47:10,639 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4590643274853801 [2025-04-14 00:47:10,639 INFO L175 Difference]: Start difference. First operand has 94 places, 106 transitions, 1404 flow. Second operand 19 states and 157 transitions. [2025-04-14 00:47:10,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 184 transitions, 2231 flow [2025-04-14 00:47:10,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 184 transitions, 1964 flow, removed 117 selfloop flow, removed 8 redundant places. [2025-04-14 00:47:10,650 INFO L231 Difference]: Finished difference. Result has 102 places, 126 transitions, 1544 flow [2025-04-14 00:47:10,651 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1544, PETRI_PLACES=102, PETRI_TRANSITIONS=126} [2025-04-14 00:47:10,651 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 83 predicate places. [2025-04-14 00:47:10,651 INFO L485 AbstractCegarLoop]: Abstraction has has 102 places, 126 transitions, 1544 flow [2025-04-14 00:47:10,651 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:10,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:10,651 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:10,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-14 00:47:10,852 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:10,852 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:10,852 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 918820039, now seen corresponding path program 3 times [2025-04-14 00:47:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:10,853 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850801587] [2025-04-14 00:47:10,853 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:47:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:10,856 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:10,863 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:10,864 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:47:10,864 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:11,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:11,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:11,099 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850801587] [2025-04-14 00:47:11,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850801587] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:11,099 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971739233] [2025-04-14 00:47:11,099 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:47:11,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:11,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:11,102 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:11,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-14 00:47:11,132 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:11,150 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:11,150 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:47:11,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:11,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 00:47:11,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:11,754 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:12,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971739233] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:12,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:12,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-04-14 00:47:12,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700174707] [2025-04-14 00:47:12,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:12,451 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:47:12,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:12,451 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:47:12,451 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:47:12,451 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:12,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 126 transitions, 1544 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:12,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:12,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:12,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:14,495 INFO L116 PetriNetUnfolderBase]: 338/668 cut-off events. [2025-04-14 00:47:14,495 INFO L117 PetriNetUnfolderBase]: For 3283/3286 co-relation queries the response was YES. [2025-04-14 00:47:14,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 668 events. 338/668 cut-off events. For 3283/3286 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 3453 event pairs, 9 based on Foata normal form. 6/669 useless extension candidates. Maximal degree in co-relation 3665. Up to 348 conditions per place. [2025-04-14 00:47:14,499 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 120 selfloop transitions, 75 changer transitions 15/211 dead transitions. [2025-04-14 00:47:14,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 211 transitions, 2499 flow [2025-04-14 00:47:14,500 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 00:47:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 00:47:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 181 transitions. [2025-04-14 00:47:14,501 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2025-04-14 00:47:14,501 INFO L175 Difference]: Start difference. First operand has 102 places, 126 transitions, 1544 flow. Second operand 21 states and 181 transitions. [2025-04-14 00:47:14,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 211 transitions, 2499 flow [2025-04-14 00:47:14,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 211 transitions, 2248 flow, removed 95 selfloop flow, removed 8 redundant places. [2025-04-14 00:47:14,514 INFO L231 Difference]: Finished difference. Result has 118 places, 138 transitions, 1691 flow [2025-04-14 00:47:14,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1321, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1691, PETRI_PLACES=118, PETRI_TRANSITIONS=138} [2025-04-14 00:47:14,514 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 99 predicate places. [2025-04-14 00:47:14,515 INFO L485 AbstractCegarLoop]: Abstraction has has 118 places, 138 transitions, 1691 flow [2025-04-14 00:47:14,515 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:14,515 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:14,515 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:14,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-14 00:47:14,715 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:14,716 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:14,716 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:14,716 INFO L85 PathProgramCache]: Analyzing trace with hash 36412110, now seen corresponding path program 4 times [2025-04-14 00:47:14,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:14,716 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803573659] [2025-04-14 00:47:14,716 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:47:14,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:14,720 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:14,728 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:14,728 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:47:14,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:14,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:14,975 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803573659] [2025-04-14 00:47:14,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803573659] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:14,975 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833829440] [2025-04-14 00:47:14,975 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:47:14,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:14,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:14,978 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:14,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-14 00:47:15,004 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:15,024 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:15,025 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:47:15,025 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:15,026 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 00:47:15,027 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:15,346 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:15,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833829440] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:15,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:15,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-04-14 00:47:15,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083260589] [2025-04-14 00:47:15,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:15,709 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-14 00:47:15,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:15,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-14 00:47:15,710 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2025-04-14 00:47:15,710 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:15,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 138 transitions, 1691 flow. Second operand has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:15,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:15,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:15,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:17,320 INFO L116 PetriNetUnfolderBase]: 380/749 cut-off events. [2025-04-14 00:47:17,320 INFO L117 PetriNetUnfolderBase]: For 5105/5108 co-relation queries the response was YES. [2025-04-14 00:47:17,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 749 events. 380/749 cut-off events. For 5105/5108 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3952 event pairs, 9 based on Foata normal form. 7/751 useless extension candidates. Maximal degree in co-relation 4223. Up to 260 conditions per place. [2025-04-14 00:47:17,326 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 106 selfloop transitions, 89 changer transitions 20/216 dead transitions. [2025-04-14 00:47:17,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 216 transitions, 2657 flow [2025-04-14 00:47:17,326 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 00:47:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 00:47:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 193 transitions. [2025-04-14 00:47:17,327 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4288888888888889 [2025-04-14 00:47:17,327 INFO L175 Difference]: Start difference. First operand has 118 places, 138 transitions, 1691 flow. Second operand 25 states and 193 transitions. [2025-04-14 00:47:17,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 216 transitions, 2657 flow [2025-04-14 00:47:17,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 216 transitions, 2453 flow, removed 62 selfloop flow, removed 15 redundant places. [2025-04-14 00:47:17,342 INFO L231 Difference]: Finished difference. Result has 130 places, 150 transitions, 1923 flow [2025-04-14 00:47:17,342 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1923, PETRI_PLACES=130, PETRI_TRANSITIONS=150} [2025-04-14 00:47:17,343 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 111 predicate places. [2025-04-14 00:47:17,343 INFO L485 AbstractCegarLoop]: Abstraction has has 130 places, 150 transitions, 1923 flow [2025-04-14 00:47:17,343 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.052631578947368) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:17,343 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:17,343 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:17,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-14 00:47:17,543 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-04-14 00:47:17,544 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:17,544 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1343004085, now seen corresponding path program 5 times [2025-04-14 00:47:17,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:17,544 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119888791] [2025-04-14 00:47:17,544 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:47:17,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:17,548 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 3 equivalence classes. [2025-04-14 00:47:17,559 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:17,559 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:47:17,559 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:17,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:17,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:17,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119888791] [2025-04-14 00:47:17,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119888791] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:17,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125815614] [2025-04-14 00:47:17,900 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:47:17,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:17,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:17,902 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:17,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-14 00:47:17,927 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 3 equivalence classes. [2025-04-14 00:47:17,940 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:17,941 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:47:17,941 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:17,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:47:17,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:23,201 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:24,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125815614] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:24,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:24,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-04-14 00:47:24,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411491399] [2025-04-14 00:47:24,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:24,165 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:47:24,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:24,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:47:24,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=296, Unknown=1, NotChecked=0, Total=380 [2025-04-14 00:47:24,166 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:24,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 150 transitions, 1923 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:24,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:24,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:24,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:26,884 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:47:32,339 INFO L116 PetriNetUnfolderBase]: 410/819 cut-off events. [2025-04-14 00:47:32,339 INFO L117 PetriNetUnfolderBase]: For 5976/5979 co-relation queries the response was YES. [2025-04-14 00:47:32,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5091 conditions, 819 events. 410/819 cut-off events. For 5976/5979 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4482 event pairs, 11 based on Foata normal form. 7/825 useless extension candidates. Maximal degree in co-relation 4908. Up to 340 conditions per place. [2025-04-14 00:47:32,345 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 119 selfloop transitions, 102 changer transitions 16/238 dead transitions. [2025-04-14 00:47:32,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 238 transitions, 3118 flow [2025-04-14 00:47:32,345 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 00:47:32,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 00:47:32,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 182 transitions. [2025-04-14 00:47:32,346 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4396135265700483 [2025-04-14 00:47:32,346 INFO L175 Difference]: Start difference. First operand has 130 places, 150 transitions, 1923 flow. Second operand 23 states and 182 transitions. [2025-04-14 00:47:32,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 238 transitions, 3118 flow [2025-04-14 00:47:32,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 238 transitions, 2832 flow, removed 96 selfloop flow, removed 12 redundant places. [2025-04-14 00:47:32,364 INFO L231 Difference]: Finished difference. Result has 146 places, 172 transitions, 2330 flow [2025-04-14 00:47:32,364 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=1695, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2330, PETRI_PLACES=146, PETRI_TRANSITIONS=172} [2025-04-14 00:47:32,365 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 127 predicate places. [2025-04-14 00:47:32,365 INFO L485 AbstractCegarLoop]: Abstraction has has 146 places, 172 transitions, 2330 flow [2025-04-14 00:47:32,365 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:32,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:32,365 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:32,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-14 00:47:32,565 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2025-04-14 00:47:32,566 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:32,566 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:32,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1178398766, now seen corresponding path program 6 times [2025-04-14 00:47:32,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:32,566 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953052989] [2025-04-14 00:47:32,566 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:47:32,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:32,569 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-04-14 00:47:32,575 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:32,575 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:47:32,575 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:32,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:32,753 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953052989] [2025-04-14 00:47:32,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953052989] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:32,753 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355214149] [2025-04-14 00:47:32,753 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:47:32,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:32,755 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:32,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-14 00:47:32,785 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 3 equivalence classes. [2025-04-14 00:47:32,821 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:32,822 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:47:32,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:32,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:47:32,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:33,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:33,120 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:37,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355214149] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:37,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:37,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-04-14 00:47:37,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434585426] [2025-04-14 00:47:37,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:37,438 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:47:37,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:37,439 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:47:37,439 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2025-04-14 00:47:37,439 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:37,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 172 transitions, 2330 flow. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:37,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:37,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:37,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:42,379 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:47:42,737 INFO L116 PetriNetUnfolderBase]: 609/1146 cut-off events. [2025-04-14 00:47:42,737 INFO L117 PetriNetUnfolderBase]: For 9806/9809 co-relation queries the response was YES. [2025-04-14 00:47:42,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7311 conditions, 1146 events. 609/1146 cut-off events. For 9806/9809 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 6429 event pairs, 15 based on Foata normal form. 7/1152 useless extension candidates. Maximal degree in co-relation 7169. Up to 478 conditions per place. [2025-04-14 00:47:42,745 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 157 selfloop transitions, 162 changer transitions 17/337 dead transitions. [2025-04-14 00:47:42,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 337 transitions, 4703 flow [2025-04-14 00:47:42,746 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-14 00:47:42,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-14 00:47:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 234 transitions. [2025-04-14 00:47:42,747 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2025-04-14 00:47:42,747 INFO L175 Difference]: Start difference. First operand has 146 places, 172 transitions, 2330 flow. Second operand 28 states and 234 transitions. [2025-04-14 00:47:42,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 337 transitions, 4703 flow [2025-04-14 00:47:42,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 337 transitions, 4512 flow, removed 88 selfloop flow, removed 8 redundant places. [2025-04-14 00:47:42,779 INFO L231 Difference]: Finished difference. Result has 181 places, 255 transitions, 3973 flow [2025-04-14 00:47:42,779 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=2165, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3973, PETRI_PLACES=181, PETRI_TRANSITIONS=255} [2025-04-14 00:47:42,779 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 162 predicate places. [2025-04-14 00:47:42,779 INFO L485 AbstractCegarLoop]: Abstraction has has 181 places, 255 transitions, 3973 flow [2025-04-14 00:47:42,780 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:42,780 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:42,780 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:42,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-14 00:47:42,980 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-14 00:47:42,980 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:42,981 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:42,981 INFO L85 PathProgramCache]: Analyzing trace with hash 55984797, now seen corresponding path program 7 times [2025-04-14 00:47:42,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:42,981 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444882674] [2025-04-14 00:47:42,981 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:47:42,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:42,983 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:47:42,992 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:42,992 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:47:42,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:43,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:43,229 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444882674] [2025-04-14 00:47:43,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444882674] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:43,230 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37990987] [2025-04-14 00:47:43,230 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:47:43,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:43,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:43,231 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:43,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-14 00:47:43,260 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:47:43,290 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:43,290 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:47:43,290 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:43,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 00:47:43,296 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:43,829 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37990987] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:44,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:44,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 00:47:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178356870] [2025-04-14 00:47:44,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:44,462 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:47:44,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:44,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:47:44,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:47:44,463 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:44,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 255 transitions, 3973 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:44,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:44,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:44,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:47,674 INFO L116 PetriNetUnfolderBase]: 609/1166 cut-off events. [2025-04-14 00:47:47,674 INFO L117 PetriNetUnfolderBase]: For 11996/11999 co-relation queries the response was YES. [2025-04-14 00:47:47,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8288 conditions, 1166 events. 609/1166 cut-off events. For 11996/11999 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6648 event pairs, 3 based on Foata normal form. 6/1171 useless extension candidates. Maximal degree in co-relation 8134. Up to 560 conditions per place. [2025-04-14 00:47:47,683 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 200 selfloop transitions, 139 changer transitions 13/353 dead transitions. [2025-04-14 00:47:47,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 353 transitions, 5379 flow [2025-04-14 00:47:47,683 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 00:47:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 00:47:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 233 transitions. [2025-04-14 00:47:47,684 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.446360153256705 [2025-04-14 00:47:47,684 INFO L175 Difference]: Start difference. First operand has 181 places, 255 transitions, 3973 flow. Second operand 29 states and 233 transitions. [2025-04-14 00:47:47,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 353 transitions, 5379 flow [2025-04-14 00:47:47,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 353 transitions, 5006 flow, removed 160 selfloop flow, removed 11 redundant places. [2025-04-14 00:47:47,739 INFO L231 Difference]: Finished difference. Result has 206 places, 270 transitions, 4268 flow [2025-04-14 00:47:47,739 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3648, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4268, PETRI_PLACES=206, PETRI_TRANSITIONS=270} [2025-04-14 00:47:47,739 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 187 predicate places. [2025-04-14 00:47:47,739 INFO L485 AbstractCegarLoop]: Abstraction has has 206 places, 270 transitions, 4268 flow [2025-04-14 00:47:47,739 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:47,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:47,740 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:47,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-14 00:47:47,940 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-14 00:47:47,941 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:47,941 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1792041644, now seen corresponding path program 8 times [2025-04-14 00:47:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:47,941 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350737753] [2025-04-14 00:47:47,941 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:47:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:47,944 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:47,949 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:47,949 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:47:47,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:48,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:48,135 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350737753] [2025-04-14 00:47:48,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350737753] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:48,135 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010839753] [2025-04-14 00:47:48,135 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:47:48,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:48,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:48,137 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:48,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-14 00:47:48,167 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:48,195 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:48,195 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:47:48,196 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:48,196 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:47:48,197 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:48,499 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:48,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:48,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010839753] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:48,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:48,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-04-14 00:47:48,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877451782] [2025-04-14 00:47:48,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:48,817 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:47:48,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:48,817 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:47:48,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:47:48,818 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:48,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 270 transitions, 4268 flow. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:48,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:48,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:48,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:47:53,303 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:47:57,314 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:47:58,121 INFO L116 PetriNetUnfolderBase]: 644/1223 cut-off events. [2025-04-14 00:47:58,122 INFO L117 PetriNetUnfolderBase]: For 14570/14573 co-relation queries the response was YES. [2025-04-14 00:47:58,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 1223 events. 644/1223 cut-off events. For 14570/14573 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 6941 event pairs, 41 based on Foata normal form. 26/1245 useless extension candidates. Maximal degree in co-relation 8768. Up to 901 conditions per place. [2025-04-14 00:47:58,131 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 237 selfloop transitions, 88 changer transitions 15/341 dead transitions. [2025-04-14 00:47:58,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 341 transitions, 5692 flow [2025-04-14 00:47:58,131 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-04-14 00:47:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-04-14 00:47:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 142 transitions. [2025-04-14 00:47:58,132 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2025-04-14 00:47:58,132 INFO L175 Difference]: Start difference. First operand has 206 places, 270 transitions, 4268 flow. Second operand 17 states and 142 transitions. [2025-04-14 00:47:58,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 341 transitions, 5692 flow [2025-04-14 00:47:58,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 341 transitions, 5456 flow, removed 80 selfloop flow, removed 21 redundant places. [2025-04-14 00:47:58,197 INFO L231 Difference]: Finished difference. Result has 203 places, 291 transitions, 4619 flow [2025-04-14 00:47:58,197 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=3772, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4619, PETRI_PLACES=203, PETRI_TRANSITIONS=291} [2025-04-14 00:47:58,198 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 184 predicate places. [2025-04-14 00:47:58,199 INFO L485 AbstractCegarLoop]: Abstraction has has 203 places, 291 transitions, 4619 flow [2025-04-14 00:47:58,199 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:58,199 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:47:58,199 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:47:58,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-04-14 00:47:58,400 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-14 00:47:58,400 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:47:58,400 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:47:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash 954991241, now seen corresponding path program 9 times [2025-04-14 00:47:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:47:58,400 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232053124] [2025-04-14 00:47:58,400 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:47:58,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:47:58,403 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:58,408 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:58,408 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:47:58,408 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:47:58,658 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232053124] [2025-04-14 00:47:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232053124] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:47:58,658 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957361023] [2025-04-14 00:47:58,658 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:47:58,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:47:58,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:47:58,660 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:47:58,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-14 00:47:58,685 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:47:58,701 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:47:58,701 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:47:58,701 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:47:58,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:47:58,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:47:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:59,222 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:47:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:47:59,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957361023] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:47:59,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:47:59,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 00:47:59,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598604876] [2025-04-14 00:47:59,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:47:59,972 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:47:59,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:47:59,973 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:47:59,973 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:47:59,973 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:47:59,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 291 transitions, 4619 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:47:59,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:47:59,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:47:59,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:48:01,346 INFO L116 PetriNetUnfolderBase]: 648/1231 cut-off events. [2025-04-14 00:48:01,346 INFO L117 PetriNetUnfolderBase]: For 14244/14247 co-relation queries the response was YES. [2025-04-14 00:48:01,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9158 conditions, 1231 events. 648/1231 cut-off events. For 14244/14247 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7033 event pairs, 5 based on Foata normal form. 5/1233 useless extension candidates. Maximal degree in co-relation 9019. Up to 856 conditions per place. [2025-04-14 00:48:01,362 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 221 selfloop transitions, 102 changer transitions 11/335 dead transitions. [2025-04-14 00:48:01,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 335 transitions, 5662 flow [2025-04-14 00:48:01,363 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 00:48:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 00:48:01,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 128 transitions. [2025-04-14 00:48:01,365 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3950617283950617 [2025-04-14 00:48:01,365 INFO L175 Difference]: Start difference. First operand has 203 places, 291 transitions, 4619 flow. Second operand 18 states and 128 transitions. [2025-04-14 00:48:01,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 335 transitions, 5662 flow [2025-04-14 00:48:01,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 335 transitions, 5435 flow, removed 87 selfloop flow, removed 6 redundant places. [2025-04-14 00:48:01,455 INFO L231 Difference]: Finished difference. Result has 216 places, 297 transitions, 4765 flow [2025-04-14 00:48:01,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=4389, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=4765, PETRI_PLACES=216, PETRI_TRANSITIONS=297} [2025-04-14 00:48:01,456 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 197 predicate places. [2025-04-14 00:48:01,456 INFO L485 AbstractCegarLoop]: Abstraction has has 216 places, 297 transitions, 4765 flow [2025-04-14 00:48:01,456 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:01,456 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:48:01,456 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:48:01,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-14 00:48:01,657 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-14 00:48:01,657 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:48:01,657 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:48:01,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1304314933, now seen corresponding path program 10 times [2025-04-14 00:48:01,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:48:01,658 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838724378] [2025-04-14 00:48:01,658 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:48:01,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:48:01,660 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:48:01,669 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:01,670 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:48:01,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:02,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:48:02,034 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838724378] [2025-04-14 00:48:02,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838724378] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:48:02,034 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987819548] [2025-04-14 00:48:02,034 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:48:02,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:02,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:48:02,036 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:48:02,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-14 00:48:02,063 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:48:02,080 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:02,080 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:48:02,080 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:02,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:48:02,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:48:06,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:06,838 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:48:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987819548] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:48:27,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:48:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-04-14 00:48:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392046185] [2025-04-14 00:48:27,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:48:27,213 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:48:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:48:27,213 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:48:27,213 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=295, Unknown=1, NotChecked=0, Total=380 [2025-04-14 00:48:27,214 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:48:27,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 297 transitions, 4765 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:27,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:48:27,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:48:27,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:48:31,074 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:48:35,129 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:48:41,006 WARN L286 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 71 DAG size of output: 67 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 00:48:47,818 INFO L116 PetriNetUnfolderBase]: 680/1304 cut-off events. [2025-04-14 00:48:47,819 INFO L117 PetriNetUnfolderBase]: For 16328/16331 co-relation queries the response was YES. [2025-04-14 00:48:47,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10035 conditions, 1304 events. 680/1304 cut-off events. For 16328/16331 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7667 event pairs, 4 based on Foata normal form. 6/1305 useless extension candidates. Maximal degree in co-relation 9895. Up to 841 conditions per place. [2025-04-14 00:48:47,842 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 231 selfloop transitions, 128 changer transitions 14/374 dead transitions. [2025-04-14 00:48:47,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 374 transitions, 6412 flow [2025-04-14 00:48:47,843 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 00:48:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 00:48:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 172 transitions. [2025-04-14 00:48:47,843 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2025-04-14 00:48:47,843 INFO L175 Difference]: Start difference. First operand has 216 places, 297 transitions, 4765 flow. Second operand 21 states and 172 transitions. [2025-04-14 00:48:47,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 374 transitions, 6412 flow [2025-04-14 00:48:47,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 374 transitions, 6221 flow, removed 87 selfloop flow, removed 8 redundant places. [2025-04-14 00:48:47,917 INFO L231 Difference]: Finished difference. Result has 234 places, 316 transitions, 5545 flow [2025-04-14 00:48:47,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=4622, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5545, PETRI_PLACES=234, PETRI_TRANSITIONS=316} [2025-04-14 00:48:47,918 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 215 predicate places. [2025-04-14 00:48:47,918 INFO L485 AbstractCegarLoop]: Abstraction has has 234 places, 316 transitions, 5545 flow [2025-04-14 00:48:47,918 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:47,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:48:47,918 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:48:47,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-14 00:48:48,119 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:48,119 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:48:48,119 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:48:48,119 INFO L85 PathProgramCache]: Analyzing trace with hash -839993206, now seen corresponding path program 11 times [2025-04-14 00:48:48,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:48:48,119 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653364921] [2025-04-14 00:48:48,120 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:48:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:48:48,122 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 3 equivalence classes. [2025-04-14 00:48:48,126 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:48,127 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:48:48,127 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:48,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:48:48,412 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653364921] [2025-04-14 00:48:48,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653364921] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:48:48,412 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141071448] [2025-04-14 00:48:48,412 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:48:48,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:48,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:48:48,414 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:48:48,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-14 00:48:48,441 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 3 equivalence classes. [2025-04-14 00:48:48,460 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:48,460 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:48:48,460 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:48,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 00:48:48,461 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:48:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:48,946 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:48:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:49,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141071448] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:48:49,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:48:49,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-04-14 00:48:49,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136259870] [2025-04-14 00:48:49,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:48:49,380 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:48:49,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:48:49,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:48:49,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:48:49,380 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:48:49,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 316 transitions, 5545 flow. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:49,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:48:49,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:48:49,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:48:51,284 INFO L116 PetriNetUnfolderBase]: 830/1571 cut-off events. [2025-04-14 00:48:51,284 INFO L117 PetriNetUnfolderBase]: For 25923/25926 co-relation queries the response was YES. [2025-04-14 00:48:51,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13004 conditions, 1571 events. 830/1571 cut-off events. For 25923/25926 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 9485 event pairs, 28 based on Foata normal form. 5/1569 useless extension candidates. Maximal degree in co-relation 12851. Up to 906 conditions per place. [2025-04-14 00:48:51,297 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 272 selfloop transitions, 161 changer transitions 14/448 dead transitions. [2025-04-14 00:48:51,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 448 transitions, 8356 flow [2025-04-14 00:48:51,298 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 00:48:51,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 00:48:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 180 transitions. [2025-04-14 00:48:51,298 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2025-04-14 00:48:51,298 INFO L175 Difference]: Start difference. First operand has 234 places, 316 transitions, 5545 flow. Second operand 21 states and 180 transitions. [2025-04-14 00:48:51,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 448 transitions, 8356 flow [2025-04-14 00:48:51,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 448 transitions, 8094 flow, removed 114 selfloop flow, removed 12 redundant places. [2025-04-14 00:48:51,460 INFO L231 Difference]: Finished difference. Result has 251 places, 377 transitions, 7165 flow [2025-04-14 00:48:51,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=5317, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7165, PETRI_PLACES=251, PETRI_TRANSITIONS=377} [2025-04-14 00:48:51,461 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 232 predicate places. [2025-04-14 00:48:51,461 INFO L485 AbstractCegarLoop]: Abstraction has has 251 places, 377 transitions, 7165 flow [2025-04-14 00:48:51,461 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:51,461 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:48:51,461 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:48:51,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-14 00:48:51,661 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:51,662 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:48:51,662 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:48:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash -947932726, now seen corresponding path program 12 times [2025-04-14 00:48:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:48:51,662 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70566695] [2025-04-14 00:48:51,662 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:48:51,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:48:51,665 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:48:51,670 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:51,670 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:48:51,670 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:51,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:51,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:48:51,851 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70566695] [2025-04-14 00:48:51,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70566695] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:48:51,851 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089995035] [2025-04-14 00:48:51,851 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:48:51,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:51,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:48:51,853 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:48:51,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-14 00:48:51,875 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:48:51,901 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:51,901 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:48:51,901 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:51,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:48:51,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:48:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:52,332 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:48:52,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:52,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089995035] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:48:52,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:48:52,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2025-04-14 00:48:52,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531058768] [2025-04-14 00:48:52,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:48:52,790 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-14 00:48:52,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:48:52,790 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-14 00:48:52,790 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2025-04-14 00:48:52,790 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:48:52,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 377 transitions, 7165 flow. Second operand has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:52,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:48:52,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:48:52,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:48:53,765 INFO L116 PetriNetUnfolderBase]: 833/1591 cut-off events. [2025-04-14 00:48:53,766 INFO L117 PetriNetUnfolderBase]: For 32860/32863 co-relation queries the response was YES. [2025-04-14 00:48:53,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14134 conditions, 1591 events. 833/1591 cut-off events. For 32860/32863 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 9721 event pairs, 23 based on Foata normal form. 9/1593 useless extension candidates. Maximal degree in co-relation 13966. Up to 776 conditions per place. [2025-04-14 00:48:53,779 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 225 selfloop transitions, 201 changer transitions 32/459 dead transitions. [2025-04-14 00:48:53,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 459 transitions, 9294 flow [2025-04-14 00:48:53,780 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 00:48:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 00:48:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 150 transitions. [2025-04-14 00:48:53,780 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2025-04-14 00:48:53,780 INFO L175 Difference]: Start difference. First operand has 251 places, 377 transitions, 7165 flow. Second operand 19 states and 150 transitions. [2025-04-14 00:48:53,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 459 transitions, 9294 flow [2025-04-14 00:48:53,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 459 transitions, 9104 flow, removed 81 selfloop flow, removed 8 redundant places. [2025-04-14 00:48:53,990 INFO L231 Difference]: Finished difference. Result has 270 places, 395 transitions, 8267 flow [2025-04-14 00:48:53,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8267, PETRI_PLACES=270, PETRI_TRANSITIONS=395} [2025-04-14 00:48:53,991 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 251 predicate places. [2025-04-14 00:48:53,991 INFO L485 AbstractCegarLoop]: Abstraction has has 270 places, 395 transitions, 8267 flow [2025-04-14 00:48:53,991 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.4375) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:53,991 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:48:53,991 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:48:53,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-04-14 00:48:54,191 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:54,192 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:48:54,192 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:48:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash -928360039, now seen corresponding path program 13 times [2025-04-14 00:48:54,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:48:54,192 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480238500] [2025-04-14 00:48:54,192 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:48:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:48:54,195 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:48:54,202 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:54,202 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:48:54,202 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:54,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:48:54,553 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480238500] [2025-04-14 00:48:54,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480238500] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:48:54,553 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504725887] [2025-04-14 00:48:54,553 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:48:54,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:48:54,555 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:48:54,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-14 00:48:54,581 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:48:54,596 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:54,596 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:48:54,596 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:54,597 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:48:54,598 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:48:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:55,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:48:55,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:55,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504725887] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:48:55,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:48:55,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 00:48:55,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556676386] [2025-04-14 00:48:55,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:48:55,961 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:48:55,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:48:55,961 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:48:55,961 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:48:55,961 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:48:55,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 395 transitions, 8267 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:55,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:48:55,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:48:55,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:48:57,726 INFO L116 PetriNetUnfolderBase]: 796/1509 cut-off events. [2025-04-14 00:48:57,726 INFO L117 PetriNetUnfolderBase]: For 35885/35888 co-relation queries the response was YES. [2025-04-14 00:48:57,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14313 conditions, 1509 events. 796/1509 cut-off events. For 35885/35888 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 9017 event pairs, 22 based on Foata normal form. 5/1507 useless extension candidates. Maximal degree in co-relation 14132. Up to 1003 conditions per place. [2025-04-14 00:48:57,737 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 291 selfloop transitions, 146 changer transitions 12/450 dead transitions. [2025-04-14 00:48:57,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 450 transitions, 9484 flow [2025-04-14 00:48:57,738 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2025-04-14 00:48:57,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2025-04-14 00:48:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 173 transitions. [2025-04-14 00:48:57,739 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2025-04-14 00:48:57,739 INFO L175 Difference]: Start difference. First operand has 270 places, 395 transitions, 8267 flow. Second operand 21 states and 173 transitions. [2025-04-14 00:48:57,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 450 transitions, 9484 flow [2025-04-14 00:48:57,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 450 transitions, 8937 flow, removed 211 selfloop flow, removed 9 redundant places. [2025-04-14 00:48:57,969 INFO L231 Difference]: Finished difference. Result has 281 places, 397 transitions, 8183 flow [2025-04-14 00:48:57,969 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8183, PETRI_PLACES=281, PETRI_TRANSITIONS=397} [2025-04-14 00:48:57,970 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 262 predicate places. [2025-04-14 00:48:57,970 INFO L485 AbstractCegarLoop]: Abstraction has has 281 places, 397 transitions, 8183 flow [2025-04-14 00:48:57,970 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:57,970 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:48:57,970 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:48:57,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-04-14 00:48:58,170 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:58,171 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:48:58,171 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:48:58,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1144077433, now seen corresponding path program 14 times [2025-04-14 00:48:58,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:48:58,171 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800779781] [2025-04-14 00:48:58,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:48:58,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:48:58,174 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:48:58,179 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:58,179 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:48:58,179 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:58,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:48:58,373 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800779781] [2025-04-14 00:48:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800779781] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:48:58,374 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827295593] [2025-04-14 00:48:58,374 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:48:58,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:48:58,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:48:58,376 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:48:58,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-04-14 00:48:58,403 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:48:58,420 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:48:58,420 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:48:58,420 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:48:58,420 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:48:58,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:48:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:58,802 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:48:59,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:48:59,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827295593] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:48:59,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:48:59,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 00:48:59,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546313030] [2025-04-14 00:48:59,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:48:59,746 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:48:59,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:48:59,747 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:48:59,747 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:48:59,747 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:48:59,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 397 transitions, 8183 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:48:59,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:48:59,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:48:59,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:00,677 INFO L116 PetriNetUnfolderBase]: 798/1516 cut-off events. [2025-04-14 00:49:00,677 INFO L117 PetriNetUnfolderBase]: For 33144/33147 co-relation queries the response was YES. [2025-04-14 00:49:00,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14027 conditions, 1516 events. 798/1516 cut-off events. For 33144/33147 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9074 event pairs, 6 based on Foata normal form. 4/1512 useless extension candidates. Maximal degree in co-relation 13836. Up to 1100 conditions per place. [2025-04-14 00:49:00,688 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 298 selfloop transitions, 120 changer transitions 9/428 dead transitions. [2025-04-14 00:49:00,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 428 transitions, 9353 flow [2025-04-14 00:49:00,689 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-14 00:49:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-14 00:49:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 95 transitions. [2025-04-14 00:49:00,690 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.405982905982906 [2025-04-14 00:49:00,690 INFO L175 Difference]: Start difference. First operand has 281 places, 397 transitions, 8183 flow. Second operand 13 states and 95 transitions. [2025-04-14 00:49:00,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 428 transitions, 9353 flow [2025-04-14 00:49:00,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 428 transitions, 9024 flow, removed 78 selfloop flow, removed 14 redundant places. [2025-04-14 00:49:00,949 INFO L231 Difference]: Finished difference. Result has 280 places, 402 transitions, 8240 flow [2025-04-14 00:49:00,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=7863, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8240, PETRI_PLACES=280, PETRI_TRANSITIONS=402} [2025-04-14 00:49:00,949 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 261 predicate places. [2025-04-14 00:49:00,949 INFO L485 AbstractCegarLoop]: Abstraction has has 280 places, 402 transitions, 8240 flow [2025-04-14 00:49:00,950 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:00,950 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:00,950 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:00,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-04-14 00:49:01,150 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:01,150 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:01,151 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1125643407, now seen corresponding path program 15 times [2025-04-14 00:49:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:01,151 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522304096] [2025-04-14 00:49:01,151 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:01,154 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:01,159 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:01,159 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:49:01,159 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:01,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:01,366 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522304096] [2025-04-14 00:49:01,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522304096] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:01,366 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436246663] [2025-04-14 00:49:01,366 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:01,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:01,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:01,367 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:01,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-04-14 00:49:01,391 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:01,407 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:01,407 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:49:01,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:01,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:49:01,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:01,905 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:02,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:02,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436246663] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:02,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:02,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 00:49:02,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174208349] [2025-04-14 00:49:02,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:02,911 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:49:02,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:02,912 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:49:02,912 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:49:02,912 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:49:02,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 402 transitions, 8240 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:02,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:02,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:49:02,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:04,195 INFO L116 PetriNetUnfolderBase]: 807/1535 cut-off events. [2025-04-14 00:49:04,195 INFO L117 PetriNetUnfolderBase]: For 35463/35466 co-relation queries the response was YES. [2025-04-14 00:49:04,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14242 conditions, 1535 events. 807/1535 cut-off events. For 35463/35466 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 9244 event pairs, 5 based on Foata normal form. 4/1531 useless extension candidates. Maximal degree in co-relation 14052. Up to 1100 conditions per place. [2025-04-14 00:49:04,205 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 300 selfloop transitions, 126 changer transitions 10/437 dead transitions. [2025-04-14 00:49:04,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 437 transitions, 9503 flow [2025-04-14 00:49:04,206 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-14 00:49:04,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-14 00:49:04,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 114 transitions. [2025-04-14 00:49:04,206 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2025-04-14 00:49:04,206 INFO L175 Difference]: Start difference. First operand has 280 places, 402 transitions, 8240 flow. Second operand 16 states and 114 transitions. [2025-04-14 00:49:04,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 437 transitions, 9503 flow [2025-04-14 00:49:04,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 437 transitions, 9272 flow, removed 53 selfloop flow, removed 6 redundant places. [2025-04-14 00:49:04,406 INFO L231 Difference]: Finished difference. Result has 290 places, 407 transitions, 8424 flow [2025-04-14 00:49:04,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=8018, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=8424, PETRI_PLACES=290, PETRI_TRANSITIONS=407} [2025-04-14 00:49:04,407 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 271 predicate places. [2025-04-14 00:49:04,407 INFO L485 AbstractCegarLoop]: Abstraction has has 290 places, 407 transitions, 8424 flow [2025-04-14 00:49:04,407 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:04,407 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:04,407 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:04,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-04-14 00:49:04,607 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:04,608 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:04,608 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:04,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1482051022, now seen corresponding path program 16 times [2025-04-14 00:49:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:04,608 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146661195] [2025-04-14 00:49:04,609 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:04,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:04,611 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:04,615 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:04,615 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:04,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:04,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:04,866 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146661195] [2025-04-14 00:49:04,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146661195] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:04,866 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304840880] [2025-04-14 00:49:04,866 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:04,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:04,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:04,868 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:04,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-04-14 00:49:04,894 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:04,921 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:04,921 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:04,921 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:04,922 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:04,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:05,413 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:05,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:05,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304840880] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:05,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:05,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-04-14 00:49:05,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128023333] [2025-04-14 00:49:05,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:05,853 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-14 00:49:05,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:05,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-14 00:49:05,854 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2025-04-14 00:49:05,854 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:49:05,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 407 transitions, 8424 flow. Second operand has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:05,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:05,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:49:05,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:07,171 INFO L116 PetriNetUnfolderBase]: 827/1576 cut-off events. [2025-04-14 00:49:07,171 INFO L117 PetriNetUnfolderBase]: For 39217/39220 co-relation queries the response was YES. [2025-04-14 00:49:07,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14794 conditions, 1576 events. 827/1576 cut-off events. For 39217/39220 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 9565 event pairs, 27 based on Foata normal form. 6/1574 useless extension candidates. Maximal degree in co-relation 14602. Up to 866 conditions per place. [2025-04-14 00:49:07,183 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 268 selfloop transitions, 184 changer transitions 15/468 dead transitions. [2025-04-14 00:49:07,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 468 transitions, 10158 flow [2025-04-14 00:49:07,183 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:49:07,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:49:07,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 158 transitions. [2025-04-14 00:49:07,184 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2025-04-14 00:49:07,184 INFO L175 Difference]: Start difference. First operand has 290 places, 407 transitions, 8424 flow. Second operand 20 states and 158 transitions. [2025-04-14 00:49:07,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 468 transitions, 10158 flow [2025-04-14 00:49:07,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 468 transitions, 9869 flow, removed 70 selfloop flow, removed 10 redundant places. [2025-04-14 00:49:07,418 INFO L231 Difference]: Finished difference. Result has 304 places, 414 transitions, 8937 flow [2025-04-14 00:49:07,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=8151, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8937, PETRI_PLACES=304, PETRI_TRANSITIONS=414} [2025-04-14 00:49:07,419 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 285 predicate places. [2025-04-14 00:49:07,419 INFO L485 AbstractCegarLoop]: Abstraction has has 304 places, 414 transitions, 8937 flow [2025-04-14 00:49:07,419 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.055555555555555) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:07,419 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:07,419 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:07,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-04-14 00:49:07,619 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2025-04-14 00:49:07,620 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:07,620 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1451574829, now seen corresponding path program 17 times [2025-04-14 00:49:07,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:07,620 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775450810] [2025-04-14 00:49:07,620 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:49:07,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:07,623 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:07,627 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:07,628 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:07,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:08,046 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:08,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:08,047 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775450810] [2025-04-14 00:49:08,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775450810] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:08,047 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545068512] [2025-04-14 00:49:08,047 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:49:08,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:08,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:08,049 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:08,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-04-14 00:49:08,073 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:08,087 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:08,087 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:08,087 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:08,088 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:49:08,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:14,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:15,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545068512] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:15,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:15,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 00:49:15,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349709975] [2025-04-14 00:49:15,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:15,125 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:49:15,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:15,126 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:49:15,126 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=341, Unknown=1, NotChecked=0, Total=420 [2025-04-14 00:49:15,126 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:49:15,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 414 transitions, 8937 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:15,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:15,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:49:15,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:28,122 INFO L116 PetriNetUnfolderBase]: 831/1578 cut-off events. [2025-04-14 00:49:28,122 INFO L117 PetriNetUnfolderBase]: For 44163/44166 co-relation queries the response was YES. [2025-04-14 00:49:28,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15522 conditions, 1578 events. 831/1578 cut-off events. For 44163/44166 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 9564 event pairs, 2 based on Foata normal form. 4/1575 useless extension candidates. Maximal degree in co-relation 15324. Up to 1125 conditions per place. [2025-04-14 00:49:28,134 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 318 selfloop transitions, 144 changer transitions 9/472 dead transitions. [2025-04-14 00:49:28,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 472 transitions, 10761 flow [2025-04-14 00:49:28,134 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 00:49:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 00:49:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 162 transitions. [2025-04-14 00:49:28,135 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2025-04-14 00:49:28,135 INFO L175 Difference]: Start difference. First operand has 304 places, 414 transitions, 8937 flow. Second operand 22 states and 162 transitions. [2025-04-14 00:49:28,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 472 transitions, 10761 flow [2025-04-14 00:49:28,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 472 transitions, 10406 flow, removed 90 selfloop flow, removed 15 redundant places. [2025-04-14 00:49:28,401 INFO L231 Difference]: Finished difference. Result has 313 places, 428 transitions, 9540 flow [2025-04-14 00:49:28,402 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=8604, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9540, PETRI_PLACES=313, PETRI_TRANSITIONS=428} [2025-04-14 00:49:28,402 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 294 predicate places. [2025-04-14 00:49:28,402 INFO L485 AbstractCegarLoop]: Abstraction has has 313 places, 428 transitions, 9540 flow [2025-04-14 00:49:28,402 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:28,402 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:28,403 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:28,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-04-14 00:49:28,603 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2025-04-14 00:49:28,603 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:28,604 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:28,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1396163569, now seen corresponding path program 18 times [2025-04-14 00:49:28,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:28,604 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001311363] [2025-04-14 00:49:28,604 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:49:28,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:28,606 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:28,611 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:28,611 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:49:28,611 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:28,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:28,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:28,893 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001311363] [2025-04-14 00:49:28,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001311363] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:28,893 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179003862] [2025-04-14 00:49:28,893 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:49:28,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:28,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:28,895 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:28,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-04-14 00:49:28,922 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 15 statements into 2 equivalence classes. [2025-04-14 00:49:28,939 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:28,939 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:49:28,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:28,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:49:28,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:29,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:30,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179003862] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:30,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:30,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2025-04-14 00:49:30,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782058686] [2025-04-14 00:49:30,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:30,352 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:49:30,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:30,352 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:49:30,352 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:49:30,352 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:49:30,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 428 transitions, 9540 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:30,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:30,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:49:30,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:32,647 INFO L116 PetriNetUnfolderBase]: 841/1607 cut-off events. [2025-04-14 00:49:32,647 INFO L117 PetriNetUnfolderBase]: For 46385/46388 co-relation queries the response was YES. [2025-04-14 00:49:32,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 1607 events. 841/1607 cut-off events. For 46385/46388 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 9867 event pairs, 2 based on Foata normal form. 4/1600 useless extension candidates. Maximal degree in co-relation 15984. Up to 1119 conditions per place. [2025-04-14 00:49:32,660 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 321 selfloop transitions, 154 changer transitions 9/485 dead transitions. [2025-04-14 00:49:32,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 485 transitions, 11131 flow [2025-04-14 00:49:32,661 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:49:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:49:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 159 transitions. [2025-04-14 00:49:32,661 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2025-04-14 00:49:32,661 INFO L175 Difference]: Start difference. First operand has 313 places, 428 transitions, 9540 flow. Second operand 20 states and 159 transitions. [2025-04-14 00:49:32,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 485 transitions, 11131 flow [2025-04-14 00:49:32,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 485 transitions, 10738 flow, removed 174 selfloop flow, removed 14 redundant places. [2025-04-14 00:49:32,939 INFO L231 Difference]: Finished difference. Result has 323 places, 436 transitions, 9854 flow [2025-04-14 00:49:32,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=9177, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9854, PETRI_PLACES=323, PETRI_TRANSITIONS=436} [2025-04-14 00:49:32,940 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 304 predicate places. [2025-04-14 00:49:32,940 INFO L485 AbstractCegarLoop]: Abstraction has has 323 places, 436 transitions, 9854 flow [2025-04-14 00:49:32,941 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:32,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:32,941 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:32,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2025-04-14 00:49:33,141 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-04-14 00:49:33,141 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:33,142 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:33,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1393684189, now seen corresponding path program 19 times [2025-04-14 00:49:33,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:33,142 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684844828] [2025-04-14 00:49:33,142 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:49:33,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:33,145 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:49:33,149 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:33,149 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:33,149 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:33,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:33,404 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684844828] [2025-04-14 00:49:33,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684844828] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:33,404 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517048341] [2025-04-14 00:49:33,404 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:49:33,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:33,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:33,406 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:33,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-04-14 00:49:33,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-04-14 00:49:33,455 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-04-14 00:49:33,455 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:49:33,455 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:33,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-14 00:49:33,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:34,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:34,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:35,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517048341] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:35,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:35,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2025-04-14 00:49:35,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491850704] [2025-04-14 00:49:35,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:35,156 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:49:35,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:35,156 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:49:35,157 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:49:35,157 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:49:35,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 436 transitions, 9854 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:35,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:35,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:49:35,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:37,143 INFO L116 PetriNetUnfolderBase]: 845/1616 cut-off events. [2025-04-14 00:49:37,144 INFO L117 PetriNetUnfolderBase]: For 51824/51827 co-relation queries the response was YES. [2025-04-14 00:49:37,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16471 conditions, 1616 events. 845/1616 cut-off events. For 51824/51827 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 9934 event pairs, 2 based on Foata normal form. 5/1610 useless extension candidates. Maximal degree in co-relation 16326. Up to 1122 conditions per place. [2025-04-14 00:49:37,158 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 317 selfloop transitions, 152 changer transitions 12/482 dead transitions. [2025-04-14 00:49:37,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 482 transitions, 11093 flow [2025-04-14 00:49:37,158 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:49:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:49:37,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 158 transitions. [2025-04-14 00:49:37,159 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4388888888888889 [2025-04-14 00:49:37,159 INFO L175 Difference]: Start difference. First operand has 323 places, 436 transitions, 9854 flow. Second operand 20 states and 158 transitions. [2025-04-14 00:49:37,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 482 transitions, 11093 flow [2025-04-14 00:49:37,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 482 transitions, 10751 flow, removed 92 selfloop flow, removed 12 redundant places. [2025-04-14 00:49:37,493 INFO L231 Difference]: Finished difference. Result has 331 places, 436 transitions, 9947 flow [2025-04-14 00:49:37,493 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=9528, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9947, PETRI_PLACES=331, PETRI_TRANSITIONS=436} [2025-04-14 00:49:37,494 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 312 predicate places. [2025-04-14 00:49:37,494 INFO L485 AbstractCegarLoop]: Abstraction has has 331 places, 436 transitions, 9947 flow [2025-04-14 00:49:37,494 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:37,494 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:37,494 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:37,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-04-14 00:49:37,706 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:37,706 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:37,707 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:37,707 INFO L85 PathProgramCache]: Analyzing trace with hash 316049886, now seen corresponding path program 20 times [2025-04-14 00:49:37,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:37,707 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816631463] [2025-04-14 00:49:37,707 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:37,711 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:49:37,715 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:49:37,715 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:37,715 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:37,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:37,843 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816631463] [2025-04-14 00:49:37,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816631463] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:37,843 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220177683] [2025-04-14 00:49:37,843 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:49:37,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:37,845 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:37,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-04-14 00:49:37,869 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:49:37,879 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:49:37,879 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:49:37,879 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:37,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:49:37,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:38,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:38,223 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:38,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220177683] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:38,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:38,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2025-04-14 00:49:38,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101450142] [2025-04-14 00:49:38,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:38,471 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-04-14 00:49:38,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:38,471 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-04-14 00:49:38,471 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2025-04-14 00:49:38,471 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:49:38,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 436 transitions, 9947 flow. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:38,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:38,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:49:38,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:39,294 INFO L116 PetriNetUnfolderBase]: 855/1629 cut-off events. [2025-04-14 00:49:39,294 INFO L117 PetriNetUnfolderBase]: For 55468/55471 co-relation queries the response was YES. [2025-04-14 00:49:39,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16857 conditions, 1629 events. 855/1629 cut-off events. For 55468/55471 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 10015 event pairs, 0 based on Foata normal form. 8/1626 useless extension candidates. Maximal degree in co-relation 16654. Up to 640 conditions per place. [2025-04-14 00:49:39,308 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 309 selfloop transitions, 202 changer transitions 1/513 dead transitions. [2025-04-14 00:49:39,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 513 transitions, 11936 flow [2025-04-14 00:49:39,309 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 00:49:39,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 00:49:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 180 transitions. [2025-04-14 00:49:39,309 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43478260869565216 [2025-04-14 00:49:39,309 INFO L175 Difference]: Start difference. First operand has 331 places, 436 transitions, 9947 flow. Second operand 23 states and 180 transitions. [2025-04-14 00:49:39,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 513 transitions, 11936 flow [2025-04-14 00:49:39,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 513 transitions, 11659 flow, removed 29 selfloop flow, removed 16 redundant places. [2025-04-14 00:49:39,604 INFO L231 Difference]: Finished difference. Result has 337 places, 455 transitions, 10955 flow [2025-04-14 00:49:39,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10955, PETRI_PLACES=337, PETRI_TRANSITIONS=455} [2025-04-14 00:49:39,605 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 318 predicate places. [2025-04-14 00:49:39,605 INFO L485 AbstractCegarLoop]: Abstraction has has 337 places, 455 transitions, 10955 flow [2025-04-14 00:49:39,605 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:39,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:39,606 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:39,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-04-14 00:49:39,806 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-04-14 00:49:39,807 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:39,807 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:39,807 INFO L85 PathProgramCache]: Analyzing trace with hash -689979587, now seen corresponding path program 21 times [2025-04-14 00:49:39,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:39,807 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400992197] [2025-04-14 00:49:39,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:39,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:39,810 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:49:39,815 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:49:39,815 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:49:39,815 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:40,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:40,302 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400992197] [2025-04-14 00:49:40,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400992197] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:40,302 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16487513] [2025-04-14 00:49:40,302 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:49:40,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:40,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:40,304 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:40,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-04-14 00:49:40,327 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:49:40,358 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:49:40,358 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:49:40,359 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:40,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 00:49:40,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:45,493 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:49:47,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:47,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16487513] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:49:47,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:49:47,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:49:47,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086032920] [2025-04-14 00:49:47,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:49:47,827 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 00:49:47,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:49:47,828 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 00:49:47,828 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=403, Unknown=1, NotChecked=0, Total=506 [2025-04-14 00:49:47,828 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:49:47,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 455 transitions, 10955 flow. Second operand has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:47,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:49:47,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:49:47,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:49:57,061 INFO L116 PetriNetUnfolderBase]: 891/1698 cut-off events. [2025-04-14 00:49:57,061 INFO L117 PetriNetUnfolderBase]: For 62715/62718 co-relation queries the response was YES. [2025-04-14 00:49:57,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18343 conditions, 1698 events. 891/1698 cut-off events. For 62715/62718 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 10569 event pairs, 2 based on Foata normal form. 7/1694 useless extension candidates. Maximal degree in co-relation 18125. Up to 1204 conditions per place. [2025-04-14 00:49:57,077 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 360 selfloop transitions, 162 changer transitions 11/534 dead transitions. [2025-04-14 00:49:57,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 534 transitions, 12932 flow [2025-04-14 00:49:57,077 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 00:49:57,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 00:49:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 182 transitions. [2025-04-14 00:49:57,078 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4396135265700483 [2025-04-14 00:49:57,078 INFO L175 Difference]: Start difference. First operand has 337 places, 455 transitions, 10955 flow. Second operand 23 states and 182 transitions. [2025-04-14 00:49:57,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 534 transitions, 12932 flow [2025-04-14 00:49:57,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 534 transitions, 12495 flow, removed 132 selfloop flow, removed 17 redundant places. [2025-04-14 00:49:57,461 INFO L231 Difference]: Finished difference. Result has 348 places, 472 transitions, 11502 flow [2025-04-14 00:49:57,461 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=10550, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=11502, PETRI_PLACES=348, PETRI_TRANSITIONS=472} [2025-04-14 00:49:57,462 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 329 predicate places. [2025-04-14 00:49:57,462 INFO L485 AbstractCegarLoop]: Abstraction has has 348 places, 472 transitions, 11502 flow [2025-04-14 00:49:57,462 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:49:57,462 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:49:57,462 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:49:57,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-04-14 00:49:57,663 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-04-14 00:49:57,663 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:49:57,663 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:49:57,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1497605379, now seen corresponding path program 22 times [2025-04-14 00:49:57,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:49:57,664 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167235030] [2025-04-14 00:49:57,664 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:57,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:49:57,666 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:49:57,671 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:49:57,671 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:57,671 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:57,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:49:57,948 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167235030] [2025-04-14 00:49:57,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167235030] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:49:57,948 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438140284] [2025-04-14 00:49:57,948 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:49:57,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:49:57,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:49:57,950 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:49:57,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-04-14 00:49:57,981 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:49:58,000 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:49:58,000 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:49:58,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:49:58,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-04-14 00:49:58,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:49:58,706 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:49:58,706 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:50:11,230 WARN L286 SmtUtils]: Spent 11.75s on a formula simplification. DAG size of input: 80 DAG size of output: 67 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 00:50:12,112 WARN L656 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2025-04-14 00:50:37,141 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 00:50:45,150 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 00:50:53,238 WARN L286 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 5 (called from [L 726] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2025-04-14 00:51:44,751 WARN L286 SmtUtils]: Spent 37.19s on a formula simplification. DAG size of input: 77 DAG size of output: 68 (called from [L 386] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2025-04-14 00:51:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:51:57,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438140284] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:51:57,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:51:57,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-04-14 00:51:57,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225772343] [2025-04-14 00:51:57,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:51:57,347 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-14 00:51:57,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:51:57,347 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-14 00:51:57,347 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=451, Unknown=3, NotChecked=0, Total=552 [2025-04-14 00:51:57,347 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:51:57,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 472 transitions, 11502 flow. Second operand has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:51:57,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:51:57,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:51:57,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:00,710 INFO L116 PetriNetUnfolderBase]: 909/1723 cut-off events. [2025-04-14 00:52:00,710 INFO L117 PetriNetUnfolderBase]: For 66486/66489 co-relation queries the response was YES. [2025-04-14 00:52:00,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18882 conditions, 1723 events. 909/1723 cut-off events. For 66486/66489 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 10640 event pairs, 2 based on Foata normal form. 4/1714 useless extension candidates. Maximal degree in co-relation 18661. Up to 948 conditions per place. [2025-04-14 00:52:00,726 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 330 selfloop transitions, 203 changer transitions 9/543 dead transitions. [2025-04-14 00:52:00,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 543 transitions, 13579 flow [2025-04-14 00:52:00,727 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 00:52:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 00:52:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 177 transitions. [2025-04-14 00:52:00,728 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.427536231884058 [2025-04-14 00:52:00,728 INFO L175 Difference]: Start difference. First operand has 348 places, 472 transitions, 11502 flow. Second operand 23 states and 177 transitions. [2025-04-14 00:52:00,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 543 transitions, 13579 flow [2025-04-14 00:52:01,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 543 transitions, 13024 flow, removed 187 selfloop flow, removed 13 redundant places. [2025-04-14 00:52:01,097 INFO L231 Difference]: Finished difference. Result has 360 places, 486 transitions, 12181 flow [2025-04-14 00:52:01,097 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=10985, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12181, PETRI_PLACES=360, PETRI_TRANSITIONS=486} [2025-04-14 00:52:01,098 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 341 predicate places. [2025-04-14 00:52:01,098 INFO L485 AbstractCegarLoop]: Abstraction has has 360 places, 486 transitions, 12181 flow [2025-04-14 00:52:01,098 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.708333333333333) internal successors, (113), 24 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:01,098 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:01,098 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:01,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2025-04-14 00:52:01,302 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:01,302 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:01,303 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:01,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1469608566, now seen corresponding path program 23 times [2025-04-14 00:52:01,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:01,303 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676562615] [2025-04-14 00:52:01,303 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:52:01,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:01,306 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:01,311 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:01,311 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:52:01,311 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:01,462 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676562615] [2025-04-14 00:52:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676562615] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:01,462 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127230083] [2025-04-14 00:52:01,462 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:52:01,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:01,464 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:01,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-04-14 00:52:01,488 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:01,496 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:01,496 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:52:01,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:01,497 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:01,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:01,910 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:02,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127230083] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:02,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:02,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:02,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805679916] [2025-04-14 00:52:02,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:02,187 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:02,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:02,188 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:02,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:02,188 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:02,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 486 transitions, 12181 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:02,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:02,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:02,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:04,037 INFO L116 PetriNetUnfolderBase]: 1008/1921 cut-off events. [2025-04-14 00:52:04,037 INFO L117 PetriNetUnfolderBase]: For 84678/84681 co-relation queries the response was YES. [2025-04-14 00:52:04,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22062 conditions, 1921 events. 1008/1921 cut-off events. For 84678/84681 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 12236 event pairs, 0 based on Foata normal form. 8/1916 useless extension candidates. Maximal degree in co-relation 21772. Up to 799 conditions per place. [2025-04-14 00:52:04,056 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 254 selfloop transitions, 385 changer transitions 0/640 dead transitions. [2025-04-14 00:52:04,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 640 transitions, 16644 flow [2025-04-14 00:52:04,056 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-14 00:52:04,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-14 00:52:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 287 transitions. [2025-04-14 00:52:04,057 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44290123456790126 [2025-04-14 00:52:04,057 INFO L175 Difference]: Start difference. First operand has 360 places, 486 transitions, 12181 flow. Second operand 36 states and 287 transitions. [2025-04-14 00:52:04,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 640 transitions, 16644 flow [2025-04-14 00:52:04,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 640 transitions, 16144 flow, removed 218 selfloop flow, removed 12 redundant places. [2025-04-14 00:52:04,566 INFO L231 Difference]: Finished difference. Result has 383 places, 561 transitions, 15539 flow [2025-04-14 00:52:04,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=11807, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=15539, PETRI_PLACES=383, PETRI_TRANSITIONS=561} [2025-04-14 00:52:04,568 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 364 predicate places. [2025-04-14 00:52:04,568 INFO L485 AbstractCegarLoop]: Abstraction has has 383 places, 561 transitions, 15539 flow [2025-04-14 00:52:04,569 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:04,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:04,569 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:04,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-04-14 00:52:04,769 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:04,769 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:04,770 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:04,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1467129186, now seen corresponding path program 24 times [2025-04-14 00:52:04,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:04,770 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896317988] [2025-04-14 00:52:04,770 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:52:04,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:04,773 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:04,777 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:04,777 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:52:04,777 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:04,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:04,913 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896317988] [2025-04-14 00:52:04,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896317988] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:04,913 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712587270] [2025-04-14 00:52:04,913 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:52:04,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:04,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:04,915 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:04,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-04-14 00:52:04,937 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:04,946 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:04,946 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:52:04,946 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:04,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:04,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:05,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:05,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712587270] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:05,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:05,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:05,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666583795] [2025-04-14 00:52:05,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:05,700 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:05,700 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:05,700 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:05,701 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:05,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 561 transitions, 15539 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:05,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:05,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:05,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:07,132 INFO L116 PetriNetUnfolderBase]: 1006/1909 cut-off events. [2025-04-14 00:52:07,132 INFO L117 PetriNetUnfolderBase]: For 81756/81759 co-relation queries the response was YES. [2025-04-14 00:52:07,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22424 conditions, 1909 events. 1006/1909 cut-off events. For 81756/81759 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 12052 event pairs, 1 based on Foata normal form. 6/1902 useless extension candidates. Maximal degree in co-relation 22191. Up to 824 conditions per place. [2025-04-14 00:52:07,150 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 241 selfloop transitions, 379 changer transitions 0/621 dead transitions. [2025-04-14 00:52:07,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 621 transitions, 16894 flow [2025-04-14 00:52:07,150 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 00:52:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 00:52:07,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 236 transitions. [2025-04-14 00:52:07,151 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4521072796934866 [2025-04-14 00:52:07,151 INFO L175 Difference]: Start difference. First operand has 383 places, 561 transitions, 15539 flow. Second operand 29 states and 236 transitions. [2025-04-14 00:52:07,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 621 transitions, 16894 flow [2025-04-14 00:52:07,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 621 transitions, 15738 flow, removed 505 selfloop flow, removed 15 redundant places. [2025-04-14 00:52:07,667 INFO L231 Difference]: Finished difference. Result has 394 places, 559 transitions, 15049 flow [2025-04-14 00:52:07,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=14291, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=15049, PETRI_PLACES=394, PETRI_TRANSITIONS=559} [2025-04-14 00:52:07,668 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 375 predicate places. [2025-04-14 00:52:07,669 INFO L485 AbstractCegarLoop]: Abstraction has has 394 places, 559 transitions, 15049 flow [2025-04-14 00:52:07,669 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:07,669 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:07,669 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:07,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-04-14 00:52:07,869 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:07,870 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:07,871 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:07,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1575068706, now seen corresponding path program 25 times [2025-04-14 00:52:07,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:07,871 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044455920] [2025-04-14 00:52:07,871 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:52:07,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:07,874 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:52:07,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:07,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:52:07,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:08,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:08,081 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044455920] [2025-04-14 00:52:08,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044455920] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:08,081 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199083289] [2025-04-14 00:52:08,081 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:52:08,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:08,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:08,084 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:08,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-04-14 00:52:08,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:52:08,117 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:08,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:52:08,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:08,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:08,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:08,494 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:08,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199083289] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:08,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:08,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:08,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85263813] [2025-04-14 00:52:08,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:08,773 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:08,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:08,773 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:08,773 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:08,773 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:08,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 559 transitions, 15049 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:08,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:08,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:08,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:10,236 INFO L116 PetriNetUnfolderBase]: 1039/1975 cut-off events. [2025-04-14 00:52:10,236 INFO L117 PetriNetUnfolderBase]: For 82822/82825 co-relation queries the response was YES. [2025-04-14 00:52:10,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22741 conditions, 1975 events. 1039/1975 cut-off events. For 82822/82825 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 12545 event pairs, 0 based on Foata normal form. 8/1968 useless extension candidates. Maximal degree in co-relation 22505. Up to 719 conditions per place. [2025-04-14 00:52:10,255 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 258 selfloop transitions, 389 changer transitions 0/648 dead transitions. [2025-04-14 00:52:10,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 648 transitions, 17330 flow [2025-04-14 00:52:10,256 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-14 00:52:10,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-14 00:52:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 257 transitions. [2025-04-14 00:52:10,257 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4199346405228758 [2025-04-14 00:52:10,257 INFO L175 Difference]: Start difference. First operand has 394 places, 559 transitions, 15049 flow. Second operand 34 states and 257 transitions. [2025-04-14 00:52:10,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 648 transitions, 17330 flow [2025-04-14 00:52:10,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 648 transitions, 16564 flow, removed 8 selfloop flow, removed 26 redundant places. [2025-04-14 00:52:10,833 INFO L231 Difference]: Finished difference. Result has 405 places, 577 transitions, 15861 flow [2025-04-14 00:52:10,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=14321, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15861, PETRI_PLACES=405, PETRI_TRANSITIONS=577} [2025-04-14 00:52:10,834 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 386 predicate places. [2025-04-14 00:52:10,834 INFO L485 AbstractCegarLoop]: Abstraction has has 405 places, 577 transitions, 15861 flow [2025-04-14 00:52:10,834 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:10,834 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:10,835 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:10,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2025-04-14 00:52:11,035 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:11,035 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:11,036 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1841013894, now seen corresponding path program 26 times [2025-04-14 00:52:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:11,036 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230298971] [2025-04-14 00:52:11,036 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:52:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:11,040 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:11,043 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:11,043 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:52:11,043 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:11,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:11,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230298971] [2025-04-14 00:52:11,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230298971] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:11,171 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833494740] [2025-04-14 00:52:11,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:52:11,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:11,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:11,173 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:11,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-04-14 00:52:11,196 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:11,204 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:11,205 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:52:11,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:11,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:11,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:11,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833494740] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:11,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921417197] [2025-04-14 00:52:11,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:11,920 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:11,920 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:11,921 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:11,921 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:11,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 577 transitions, 15861 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:11,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:11,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:11,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:14,273 INFO L116 PetriNetUnfolderBase]: 1177/2244 cut-off events. [2025-04-14 00:52:14,273 INFO L117 PetriNetUnfolderBase]: For 105441/105444 co-relation queries the response was YES. [2025-04-14 00:52:14,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26970 conditions, 2244 events. 1177/2244 cut-off events. For 105441/105444 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 14708 event pairs, 2 based on Foata normal form. 14/2241 useless extension candidates. Maximal degree in co-relation 26727. Up to 725 conditions per place. [2025-04-14 00:52:14,295 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 261 selfloop transitions, 471 changer transitions 0/733 dead transitions. [2025-04-14 00:52:14,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 733 transitions, 20914 flow [2025-04-14 00:52:14,296 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 00:52:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 00:52:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 281 transitions. [2025-04-14 00:52:14,297 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44603174603174606 [2025-04-14 00:52:14,297 INFO L175 Difference]: Start difference. First operand has 405 places, 577 transitions, 15861 flow. Second operand 35 states and 281 transitions. [2025-04-14 00:52:14,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 733 transitions, 20914 flow [2025-04-14 00:52:14,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 733 transitions, 20291 flow, removed 63 selfloop flow, removed 23 redundant places. [2025-04-14 00:52:14,939 INFO L231 Difference]: Finished difference. Result has 425 places, 657 transitions, 19780 flow [2025-04-14 00:52:14,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=15305, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=19780, PETRI_PLACES=425, PETRI_TRANSITIONS=657} [2025-04-14 00:52:14,940 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 406 predicate places. [2025-04-14 00:52:14,940 INFO L485 AbstractCegarLoop]: Abstraction has has 425 places, 657 transitions, 19780 flow [2025-04-14 00:52:14,940 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:14,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:14,940 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:14,946 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-04-14 00:52:15,141 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2025-04-14 00:52:15,141 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:15,142 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:15,142 INFO L85 PathProgramCache]: Analyzing trace with hash 180560828, now seen corresponding path program 27 times [2025-04-14 00:52:15,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:15,142 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995797574] [2025-04-14 00:52:15,142 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:52:15,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:15,145 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:15,148 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:15,148 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:52:15,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:15,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:15,345 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995797574] [2025-04-14 00:52:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995797574] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:15,345 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040829711] [2025-04-14 00:52:15,345 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:52:15,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:15,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:15,347 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:15,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-04-14 00:52:15,371 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:15,381 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:15,381 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-14 00:52:15,382 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:15,382 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:15,383 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:15,793 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:16,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:16,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040829711] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:16,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:16,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:52:16,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650077284] [2025-04-14 00:52:16,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:16,131 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:52:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:16,131 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:52:16,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:52:16,131 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:16,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 657 transitions, 19780 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:16,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:16,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:16,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:17,807 INFO L116 PetriNetUnfolderBase]: 1253/2405 cut-off events. [2025-04-14 00:52:17,808 INFO L117 PetriNetUnfolderBase]: For 117383/117386 co-relation queries the response was YES. [2025-04-14 00:52:17,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30309 conditions, 2405 events. 1253/2405 cut-off events. For 117383/117386 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 15965 event pairs, 73 based on Foata normal form. 10/2396 useless extension candidates. Maximal degree in co-relation 29971. Up to 1150 conditions per place. [2025-04-14 00:52:17,832 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 420 selfloop transitions, 328 changer transitions 0/749 dead transitions. [2025-04-14 00:52:17,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 749 transitions, 23380 flow [2025-04-14 00:52:17,833 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 00:52:17,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 00:52:17,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 204 transitions. [2025-04-14 00:52:17,834 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2025-04-14 00:52:17,834 INFO L175 Difference]: Start difference. First operand has 425 places, 657 transitions, 19780 flow. Second operand 26 states and 204 transitions. [2025-04-14 00:52:17,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 749 transitions, 23380 flow [2025-04-14 00:52:18,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 749 transitions, 21762 flow, removed 660 selfloop flow, removed 13 redundant places. [2025-04-14 00:52:18,799 INFO L231 Difference]: Finished difference. Result has 446 places, 694 transitions, 20780 flow [2025-04-14 00:52:18,800 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=18511, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=656, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=20780, PETRI_PLACES=446, PETRI_TRANSITIONS=694} [2025-04-14 00:52:18,800 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 427 predicate places. [2025-04-14 00:52:18,800 INFO L485 AbstractCegarLoop]: Abstraction has has 446 places, 694 transitions, 20780 flow [2025-04-14 00:52:18,800 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:18,800 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:18,801 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:18,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-04-14 00:52:19,001 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:19,001 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:19,002 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -531885968, now seen corresponding path program 28 times [2025-04-14 00:52:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:19,002 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473541843] [2025-04-14 00:52:19,002 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:52:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:19,005 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:19,009 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:19,009 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:52:19,009 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:19,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:19,117 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473541843] [2025-04-14 00:52:19,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473541843] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:19,117 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298632996] [2025-04-14 00:52:19,117 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:52:19,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:19,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:19,119 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:19,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-04-14 00:52:19,142 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:19,150 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:19,150 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:52:19,150 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:19,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:19,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:19,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:19,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:19,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298632996] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:19,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:19,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783764610] [2025-04-14 00:52:19,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:19,810 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:19,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:19,810 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:19,810 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:19,810 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:19,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 694 transitions, 20780 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:19,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:19,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:19,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:21,637 INFO L116 PetriNetUnfolderBase]: 1282/2474 cut-off events. [2025-04-14 00:52:21,637 INFO L117 PetriNetUnfolderBase]: For 120687/120690 co-relation queries the response was YES. [2025-04-14 00:52:21,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30444 conditions, 2474 events. 1282/2474 cut-off events. For 120687/120690 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 16565 event pairs, 2 based on Foata normal form. 14/2469 useless extension candidates. Maximal degree in co-relation 30136. Up to 660 conditions per place. [2025-04-14 00:52:21,665 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 306 selfloop transitions, 469 changer transitions 0/776 dead transitions. [2025-04-14 00:52:21,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 776 transitions, 23220 flow [2025-04-14 00:52:21,666 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-14 00:52:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-14 00:52:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 242 transitions. [2025-04-14 00:52:21,666 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2025-04-14 00:52:21,666 INFO L175 Difference]: Start difference. First operand has 446 places, 694 transitions, 20780 flow. Second operand 33 states and 242 transitions. [2025-04-14 00:52:21,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 776 transitions, 23220 flow [2025-04-14 00:52:22,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 776 transitions, 22826 flow, removed 173 selfloop flow, removed 10 redundant places. [2025-04-14 00:52:22,588 INFO L231 Difference]: Finished difference. Result has 473 places, 712 transitions, 22041 flow [2025-04-14 00:52:22,588 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=20333, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=22041, PETRI_PLACES=473, PETRI_TRANSITIONS=712} [2025-04-14 00:52:22,589 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 454 predicate places. [2025-04-14 00:52:22,589 INFO L485 AbstractCegarLoop]: Abstraction has has 473 places, 712 transitions, 22041 flow [2025-04-14 00:52:22,589 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:22,589 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:22,589 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:22,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2025-04-14 00:52:22,790 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:22,790 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:22,790 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash 125149568, now seen corresponding path program 29 times [2025-04-14 00:52:22,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:22,791 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567557552] [2025-04-14 00:52:22,791 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:52:22,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:22,794 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:22,796 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:22,797 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:52:22,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:22,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:22,968 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567557552] [2025-04-14 00:52:22,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567557552] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:22,968 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691598141] [2025-04-14 00:52:22,968 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:52:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:22,970 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:22,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-04-14 00:52:22,992 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:23,000 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:23,000 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:52:23,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:23,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:23,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:23,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:23,468 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:23,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:23,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691598141] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:23,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:23,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:23,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412066441] [2025-04-14 00:52:23,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:23,781 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:23,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:23,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:23,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:23,781 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:23,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 712 transitions, 22041 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:23,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:23,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:23,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:25,831 INFO L116 PetriNetUnfolderBase]: 1394/2722 cut-off events. [2025-04-14 00:52:25,831 INFO L117 PetriNetUnfolderBase]: For 144197/144200 co-relation queries the response was YES. [2025-04-14 00:52:25,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35187 conditions, 2722 events. 1394/2722 cut-off events. For 144197/144200 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 18807 event pairs, 22 based on Foata normal form. 8/2711 useless extension candidates. Maximal degree in co-relation 34822. Up to 948 conditions per place. [2025-04-14 00:52:25,861 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 311 selfloop transitions, 518 changer transitions 0/830 dead transitions. [2025-04-14 00:52:25,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 830 transitions, 26263 flow [2025-04-14 00:52:25,862 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 00:52:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 00:52:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 244 transitions. [2025-04-14 00:52:25,863 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2025-04-14 00:52:25,863 INFO L175 Difference]: Start difference. First operand has 473 places, 712 transitions, 22041 flow. Second operand 31 states and 244 transitions. [2025-04-14 00:52:25,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 830 transitions, 26263 flow [2025-04-14 00:52:26,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 830 transitions, 26068 flow, removed 62 selfloop flow, removed 14 redundant places. [2025-04-14 00:52:27,005 INFO L231 Difference]: Finished difference. Result has 494 places, 768 transitions, 25535 flow [2025-04-14 00:52:27,006 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=21815, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=25535, PETRI_PLACES=494, PETRI_TRANSITIONS=768} [2025-04-14 00:52:27,006 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 475 predicate places. [2025-04-14 00:52:27,007 INFO L485 AbstractCegarLoop]: Abstraction has has 494 places, 768 transitions, 25535 flow [2025-04-14 00:52:27,007 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:27,007 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:27,007 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:27,012 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-04-14 00:52:27,207 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2025-04-14 00:52:27,207 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:27,208 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1843493274, now seen corresponding path program 30 times [2025-04-14 00:52:27,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:27,208 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662401081] [2025-04-14 00:52:27,208 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:52:27,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:27,211 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:27,214 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:27,214 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:52:27,214 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:27,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:27,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:27,376 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662401081] [2025-04-14 00:52:27,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662401081] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:27,376 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096841992] [2025-04-14 00:52:27,376 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:52:27,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:27,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:27,378 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:27,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2025-04-14 00:52:27,405 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:27,415 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:27,415 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:52:27,415 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:27,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:27,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:27,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:28,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096841992] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:28,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:28,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:28,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104814744] [2025-04-14 00:52:28,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:28,138 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:28,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:28,139 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:28,139 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:28,139 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:28,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 768 transitions, 25535 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:28,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:28,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:28,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:30,330 INFO L116 PetriNetUnfolderBase]: 1451/2831 cut-off events. [2025-04-14 00:52:30,330 INFO L117 PetriNetUnfolderBase]: For 156932/156935 co-relation queries the response was YES. [2025-04-14 00:52:30,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37920 conditions, 2831 events. 1451/2831 cut-off events. For 156932/156935 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19443 event pairs, 2 based on Foata normal form. 12/2824 useless extension candidates. Maximal degree in co-relation 37544. Up to 985 conditions per place. [2025-04-14 00:52:30,362 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 285 selfloop transitions, 567 changer transitions 0/853 dead transitions. [2025-04-14 00:52:30,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 853 transitions, 28213 flow [2025-04-14 00:52:30,363 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-04-14 00:52:30,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-04-14 00:52:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 235 transitions. [2025-04-14 00:52:30,366 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4351851851851852 [2025-04-14 00:52:30,366 INFO L175 Difference]: Start difference. First operand has 494 places, 768 transitions, 25535 flow. Second operand 30 states and 235 transitions. [2025-04-14 00:52:30,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 853 transitions, 28213 flow [2025-04-14 00:52:31,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 853 transitions, 27519 flow, removed 295 selfloop flow, removed 19 redundant places. [2025-04-14 00:52:31,819 INFO L231 Difference]: Finished difference. Result has 506 places, 797 transitions, 27130 flow [2025-04-14 00:52:31,820 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=24705, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=765, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=27130, PETRI_PLACES=506, PETRI_TRANSITIONS=797} [2025-04-14 00:52:31,820 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 487 predicate places. [2025-04-14 00:52:31,820 INFO L485 AbstractCegarLoop]: Abstraction has has 506 places, 797 transitions, 27130 flow [2025-04-14 00:52:31,821 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:31,821 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:31,821 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:31,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2025-04-14 00:52:32,025 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2025-04-14 00:52:32,025 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:32,025 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash 122670188, now seen corresponding path program 31 times [2025-04-14 00:52:32,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:32,026 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098125355] [2025-04-14 00:52:32,026 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:52:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:32,029 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:52:32,031 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:32,031 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:52:32,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:32,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:32,176 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098125355] [2025-04-14 00:52:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098125355] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:32,176 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183361808] [2025-04-14 00:52:32,176 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:52:32,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:32,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:32,178 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:32,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2025-04-14 00:52:32,201 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:52:32,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:32,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:52:32,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:32,211 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:32,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:32,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:32,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183361808] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:32,992 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:32,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:52:32,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391281143] [2025-04-14 00:52:32,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:32,993 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:52:32,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:32,993 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:52:32,993 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:52:32,993 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:32,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 797 transitions, 27130 flow. Second operand has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:32,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:32,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:32,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:35,353 INFO L116 PetriNetUnfolderBase]: 1499/2923 cut-off events. [2025-04-14 00:52:35,353 INFO L117 PetriNetUnfolderBase]: For 185794/185797 co-relation queries the response was YES. [2025-04-14 00:52:35,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40469 conditions, 2923 events. 1499/2923 cut-off events. For 185794/185797 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 20161 event pairs, 5 based on Foata normal form. 14/2920 useless extension candidates. Maximal degree in co-relation 40089. Up to 903 conditions per place. [2025-04-14 00:52:35,388 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 297 selfloop transitions, 592 changer transitions 0/890 dead transitions. [2025-04-14 00:52:35,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 890 transitions, 30813 flow [2025-04-14 00:52:35,389 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-14 00:52:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-14 00:52:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 261 transitions. [2025-04-14 00:52:35,389 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2025-04-14 00:52:35,389 INFO L175 Difference]: Start difference. First operand has 506 places, 797 transitions, 27130 flow. Second operand 33 states and 261 transitions. [2025-04-14 00:52:35,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 890 transitions, 30813 flow [2025-04-14 00:52:36,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 890 transitions, 30684 flow, removed 23 selfloop flow, removed 17 redundant places. [2025-04-14 00:52:36,963 INFO L231 Difference]: Finished difference. Result has 522 places, 828 transitions, 29943 flow [2025-04-14 00:52:36,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=26884, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=561, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=29943, PETRI_PLACES=522, PETRI_TRANSITIONS=828} [2025-04-14 00:52:36,964 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 503 predicate places. [2025-04-14 00:52:36,964 INFO L485 AbstractCegarLoop]: Abstraction has has 522 places, 828 transitions, 29943 flow [2025-04-14 00:52:36,964 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7727272727272725) internal successors, (105), 22 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:36,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:36,964 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:36,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2025-04-14 00:52:37,165 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2025-04-14 00:52:37,165 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:37,166 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:37,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1280272530, now seen corresponding path program 32 times [2025-04-14 00:52:37,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:37,166 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445780932] [2025-04-14 00:52:37,166 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:52:37,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:37,169 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:37,173 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:37,173 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:52:37,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:37,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:37,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445780932] [2025-04-14 00:52:37,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445780932] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:37,295 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920469209] [2025-04-14 00:52:37,295 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:52:37,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:37,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:37,297 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:37,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2025-04-14 00:52:37,321 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:37,332 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:37,332 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:52:37,332 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:37,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:37,334 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:37,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:37,686 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:37,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920469209] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:37,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:37,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:37,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688952248] [2025-04-14 00:52:37,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:37,965 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:37,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:37,965 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:37,965 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:37,965 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:37,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 828 transitions, 29943 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:37,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:37,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:37,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:39,719 INFO L116 PetriNetUnfolderBase]: 1557/3017 cut-off events. [2025-04-14 00:52:39,720 INFO L117 PetriNetUnfolderBase]: For 208322/208325 co-relation queries the response was YES. [2025-04-14 00:52:39,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43922 conditions, 3017 events. 1557/3017 cut-off events. For 208322/208325 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 20865 event pairs, 25 based on Foata normal form. 8/3008 useless extension candidates. Maximal degree in co-relation 43534. Up to 1222 conditions per place. [2025-04-14 00:52:39,752 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 496 selfloop transitions, 413 changer transitions 0/910 dead transitions. [2025-04-14 00:52:39,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 910 transitions, 33882 flow [2025-04-14 00:52:39,752 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 00:52:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 00:52:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 197 transitions. [2025-04-14 00:52:39,753 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4053497942386831 [2025-04-14 00:52:39,753 INFO L175 Difference]: Start difference. First operand has 522 places, 828 transitions, 29943 flow. Second operand 27 states and 197 transitions. [2025-04-14 00:52:39,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 910 transitions, 33882 flow [2025-04-14 00:52:41,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 910 transitions, 33036 flow, removed 338 selfloop flow, removed 20 redundant places. [2025-04-14 00:52:41,287 INFO L231 Difference]: Finished difference. Result has 534 places, 862 transitions, 31896 flow [2025-04-14 00:52:41,287 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=29097, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=383, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=31896, PETRI_PLACES=534, PETRI_TRANSITIONS=862} [2025-04-14 00:52:41,288 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 515 predicate places. [2025-04-14 00:52:41,288 INFO L485 AbstractCegarLoop]: Abstraction has has 534 places, 862 transitions, 31896 flow [2025-04-14 00:52:41,288 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:41,288 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:41,288 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:41,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2025-04-14 00:52:41,488 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2025-04-14 00:52:41,489 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:41,489 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1393574430, now seen corresponding path program 33 times [2025-04-14 00:52:41,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:41,489 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810470118] [2025-04-14 00:52:41,489 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:52:41,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:41,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:41,495 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:41,495 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:52:41,495 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:41,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:41,606 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810470118] [2025-04-14 00:52:41,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810470118] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:41,607 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554679461] [2025-04-14 00:52:41,607 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:52:41,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:41,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:41,609 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:41,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2025-04-14 00:52:41,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:41,640 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:41,640 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:52:41,640 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:41,641 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:41,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:42,045 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:42,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554679461] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:42,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:42,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:42,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303790416] [2025-04-14 00:52:42,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:42,302 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:42,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:42,302 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:42,302 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:42,302 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:42,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 862 transitions, 31896 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:42,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:42,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:42,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:44,323 INFO L116 PetriNetUnfolderBase]: 1602/3111 cut-off events. [2025-04-14 00:52:44,324 INFO L117 PetriNetUnfolderBase]: For 220573/220576 co-relation queries the response was YES. [2025-04-14 00:52:44,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46362 conditions, 3111 events. 1602/3111 cut-off events. For 220573/220576 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 21683 event pairs, 3 based on Foata normal form. 6/3098 useless extension candidates. Maximal degree in co-relation 45956. Up to 1411 conditions per place. [2025-04-14 00:52:44,368 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 358 selfloop transitions, 570 changer transitions 0/929 dead transitions. [2025-04-14 00:52:44,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 929 transitions, 35227 flow [2025-04-14 00:52:44,368 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 00:52:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 00:52:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 195 transitions. [2025-04-14 00:52:44,369 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2025-04-14 00:52:44,369 INFO L175 Difference]: Start difference. First operand has 534 places, 862 transitions, 31896 flow. Second operand 25 states and 195 transitions. [2025-04-14 00:52:44,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 929 transitions, 35227 flow [2025-04-14 00:52:46,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 929 transitions, 34403 flow, removed 264 selfloop flow, removed 15 redundant places. [2025-04-14 00:52:46,337 INFO L231 Difference]: Finished difference. Result has 545 places, 886 transitions, 33610 flow [2025-04-14 00:52:46,338 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=31030, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=861, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=548, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=33610, PETRI_PLACES=545, PETRI_TRANSITIONS=886} [2025-04-14 00:52:46,338 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 526 predicate places. [2025-04-14 00:52:46,338 INFO L485 AbstractCegarLoop]: Abstraction has has 545 places, 886 transitions, 33610 flow [2025-04-14 00:52:46,338 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:46,338 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:46,339 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:46,346 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2025-04-14 00:52:46,539 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:46,539 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:46,540 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1391095050, now seen corresponding path program 34 times [2025-04-14 00:52:46,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:46,540 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509547448] [2025-04-14 00:52:46,540 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:52:46,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:46,543 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:46,546 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:46,546 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:52:46,546 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:46,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:46,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:46,646 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509547448] [2025-04-14 00:52:46,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509547448] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:46,646 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549885249] [2025-04-14 00:52:46,646 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:52:46,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:46,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:46,648 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:46,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2025-04-14 00:52:46,670 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:52:46,678 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:46,678 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:52:46,678 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:46,679 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:46,679 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:47,009 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:47,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549885249] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:47,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:47,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:47,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044254417] [2025-04-14 00:52:47,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:47,261 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:47,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:47,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:47,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:47,262 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:47,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 886 transitions, 33610 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:47,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:47,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:47,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:49,320 INFO L116 PetriNetUnfolderBase]: 1598/3097 cut-off events. [2025-04-14 00:52:49,321 INFO L117 PetriNetUnfolderBase]: For 236950/236953 co-relation queries the response was YES. [2025-04-14 00:52:49,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46697 conditions, 3097 events. 1598/3097 cut-off events. For 236950/236953 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 21580 event pairs, 23 based on Foata normal form. 8/3086 useless extension candidates. Maximal degree in co-relation 46316. Up to 1358 conditions per place. [2025-04-14 00:52:49,354 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 350 selfloop transitions, 575 changer transitions 0/926 dead transitions. [2025-04-14 00:52:49,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 926 transitions, 35468 flow [2025-04-14 00:52:49,354 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 00:52:49,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 00:52:49,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 199 transitions. [2025-04-14 00:52:49,355 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4252136752136752 [2025-04-14 00:52:49,355 INFO L175 Difference]: Start difference. First operand has 545 places, 886 transitions, 33610 flow. Second operand 26 states and 199 transitions. [2025-04-14 00:52:49,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 926 transitions, 35468 flow [2025-04-14 00:52:51,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 926 transitions, 35127 flow, removed 122 selfloop flow, removed 16 redundant places. [2025-04-14 00:52:51,157 INFO L231 Difference]: Finished difference. Result has 553 places, 884 transitions, 34300 flow [2025-04-14 00:52:51,157 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=33150, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=34300, PETRI_PLACES=553, PETRI_TRANSITIONS=884} [2025-04-14 00:52:51,158 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 534 predicate places. [2025-04-14 00:52:51,158 INFO L485 AbstractCegarLoop]: Abstraction has has 553 places, 884 transitions, 34300 flow [2025-04-14 00:52:51,158 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:51,158 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:51,158 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:51,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2025-04-14 00:52:51,358 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2025-04-14 00:52:51,359 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:51,359 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:51,359 INFO L85 PathProgramCache]: Analyzing trace with hash -324769276, now seen corresponding path program 35 times [2025-04-14 00:52:51,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:51,359 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281968035] [2025-04-14 00:52:51,359 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:52:51,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:51,362 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:51,365 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:51,365 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:52:51,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:51,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:51,472 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281968035] [2025-04-14 00:52:51,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281968035] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:51,472 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719808554] [2025-04-14 00:52:51,472 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:52:51,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:51,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:51,475 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:51,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2025-04-14 00:52:51,496 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:51,504 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:51,505 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:52:51,505 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:51,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:51,506 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:51,868 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:52,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719808554] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:52,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:52,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:52,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750903232] [2025-04-14 00:52:52,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:52,161 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:52,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:52,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:52,162 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:52,162 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:52,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 884 transitions, 34300 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:52,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:52,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:52,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:54,116 INFO L116 PetriNetUnfolderBase]: 1661/3226 cut-off events. [2025-04-14 00:52:54,116 INFO L117 PetriNetUnfolderBase]: For 248688/248691 co-relation queries the response was YES. [2025-04-14 00:52:54,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50190 conditions, 3226 events. 1661/3226 cut-off events. For 248688/248691 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 22637 event pairs, 24 based on Foata normal form. 6/3211 useless extension candidates. Maximal degree in co-relation 49769. Up to 1369 conditions per place. [2025-04-14 00:52:54,152 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 380 selfloop transitions, 588 changer transitions 0/969 dead transitions. [2025-04-14 00:52:54,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 969 transitions, 38529 flow [2025-04-14 00:52:54,153 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 00:52:54,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 00:52:54,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 190 transitions. [2025-04-14 00:52:54,153 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2025-04-14 00:52:54,153 INFO L175 Difference]: Start difference. First operand has 553 places, 884 transitions, 34300 flow. Second operand 25 states and 190 transitions. [2025-04-14 00:52:54,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 969 transitions, 38529 flow [2025-04-14 00:52:56,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 969 transitions, 38189 flow, removed 0 selfloop flow, removed 20 redundant places. [2025-04-14 00:52:56,262 INFO L231 Difference]: Finished difference. Result has 562 places, 922 transitions, 37545 flow [2025-04-14 00:52:56,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=33970, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=557, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=37545, PETRI_PLACES=562, PETRI_TRANSITIONS=922} [2025-04-14 00:52:56,263 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 543 predicate places. [2025-04-14 00:52:56,263 INFO L485 AbstractCegarLoop]: Abstraction has has 562 places, 922 transitions, 37545 flow [2025-04-14 00:52:56,264 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:56,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:52:56,264 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:52:56,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2025-04-14 00:52:56,464 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2025-04-14 00:52:56,464 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:52:56,465 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:52:56,465 INFO L85 PathProgramCache]: Analyzing trace with hash -327248656, now seen corresponding path program 36 times [2025-04-14 00:52:56,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:52:56,465 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094552819] [2025-04-14 00:52:56,465 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:52:56,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:52:56,468 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:56,471 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:56,472 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:52:56,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:56,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:52:56,583 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094552819] [2025-04-14 00:52:56,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094552819] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:52:56,583 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210928326] [2025-04-14 00:52:56,583 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:52:56,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:52:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:52:56,585 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:52:56,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2025-04-14 00:52:56,606 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:52:56,615 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:52:56,615 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:52:56,615 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:52:56,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:52:56,616 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:52:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:56,979 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:52:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:52:57,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210928326] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:52:57,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:52:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:52:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897500468] [2025-04-14 00:52:57,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:52:57,284 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:52:57,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:52:57,284 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:52:57,284 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:52:57,284 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:52:57,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 922 transitions, 37545 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:52:57,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:52:57,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:52:57,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:52:59,118 INFO L116 PetriNetUnfolderBase]: 1656/3216 cut-off events. [2025-04-14 00:52:59,118 INFO L117 PetriNetUnfolderBase]: For 273968/273971 co-relation queries the response was YES. [2025-04-14 00:52:59,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51432 conditions, 3216 events. 1656/3216 cut-off events. For 273968/273971 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22618 event pairs, 5 based on Foata normal form. 8/3203 useless extension candidates. Maximal degree in co-relation 50999. Up to 1323 conditions per place. [2025-04-14 00:52:59,251 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 371 selfloop transitions, 589 changer transitions 0/961 dead transitions. [2025-04-14 00:52:59,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 961 transitions, 39494 flow [2025-04-14 00:52:59,252 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2025-04-14 00:52:59,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2025-04-14 00:52:59,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 182 transitions. [2025-04-14 00:52:59,253 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2025-04-14 00:52:59,253 INFO L175 Difference]: Start difference. First operand has 562 places, 922 transitions, 37545 flow. Second operand 24 states and 182 transitions. [2025-04-14 00:52:59,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 961 transitions, 39494 flow [2025-04-14 00:53:01,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 961 transitions, 39077 flow, removed 182 selfloop flow, removed 12 redundant places. [2025-04-14 00:53:01,276 INFO L231 Difference]: Finished difference. Result has 572 places, 920 transitions, 38198 flow [2025-04-14 00:53:01,277 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=37020, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=589, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=38198, PETRI_PLACES=572, PETRI_TRANSITIONS=920} [2025-04-14 00:53:01,277 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 553 predicate places. [2025-04-14 00:53:01,277 INFO L485 AbstractCegarLoop]: Abstraction has has 572 places, 920 transitions, 38198 flow [2025-04-14 00:53:01,277 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:01,277 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:01,278 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:01,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2025-04-14 00:53:01,479 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2025-04-14 00:53:01,479 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:01,479 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:01,479 INFO L85 PathProgramCache]: Analyzing trace with hash -269358016, now seen corresponding path program 37 times [2025-04-14 00:53:01,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:01,479 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90566921] [2025-04-14 00:53:01,479 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:53:01,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:01,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:53:01,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:01,484 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:53:01,484 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:01,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:01,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:01,747 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90566921] [2025-04-14 00:53:01,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90566921] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:01,747 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91062008] [2025-04-14 00:53:01,747 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:53:01,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:01,749 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:01,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2025-04-14 00:53:01,775 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:53:01,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:01,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:53:01,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:01,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:01,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:02,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:02,177 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:02,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91062008] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:02,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:02,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-04-14 00:53:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183752241] [2025-04-14 00:53:02,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:02,512 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 00:53:02,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:02,513 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 00:53:02,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2025-04-14 00:53:02,513 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:02,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 920 transitions, 38198 flow. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:02,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:02,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:02,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:04,218 INFO L116 PetriNetUnfolderBase]: 1657/3216 cut-off events. [2025-04-14 00:53:04,218 INFO L117 PetriNetUnfolderBase]: For 278411/278414 co-relation queries the response was YES. [2025-04-14 00:53:04,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52449 conditions, 3216 events. 1657/3216 cut-off events. For 278411/278414 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 22464 event pairs, 131 based on Foata normal form. 8/3203 useless extension candidates. Maximal degree in co-relation 52105. Up to 1724 conditions per place. [2025-04-14 00:53:04,259 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 564 selfloop transitions, 392 changer transitions 0/957 dead transitions. [2025-04-14 00:53:04,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 957 transitions, 40534 flow [2025-04-14 00:53:04,259 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:53:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:53:04,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 145 transitions. [2025-04-14 00:53:04,260 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2025-04-14 00:53:04,260 INFO L175 Difference]: Start difference. First operand has 572 places, 920 transitions, 38198 flow. Second operand 20 states and 145 transitions. [2025-04-14 00:53:04,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 957 transitions, 40534 flow [2025-04-14 00:53:06,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 957 transitions, 40283 flow, removed 75 selfloop flow, removed 15 redundant places. [2025-04-14 00:53:06,532 INFO L231 Difference]: Finished difference. Result has 578 places, 922 transitions, 38963 flow [2025-04-14 00:53:06,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=37938, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=389, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=38963, PETRI_PLACES=578, PETRI_TRANSITIONS=922} [2025-04-14 00:53:06,533 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 559 predicate places. [2025-04-14 00:53:06,533 INFO L485 AbstractCegarLoop]: Abstraction has has 578 places, 922 transitions, 38963 flow [2025-04-14 00:53:06,533 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:06,533 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:06,533 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:06,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2025-04-14 00:53:06,736 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:06,737 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:06,737 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1998405350, now seen corresponding path program 38 times [2025-04-14 00:53:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:06,737 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518931552] [2025-04-14 00:53:06,737 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:53:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:06,740 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:06,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:06,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:06,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:06,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:06,855 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518931552] [2025-04-14 00:53:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518931552] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:06,855 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248953695] [2025-04-14 00:53:06,855 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:53:06,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:06,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:06,857 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:06,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2025-04-14 00:53:06,878 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:06,886 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:06,886 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:06,886 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:06,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:06,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:07,203 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:07,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248953695] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:07,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:07,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:53:07,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111911836] [2025-04-14 00:53:07,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:07,607 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:53:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:07,607 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:53:07,607 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:53:07,608 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:07,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 922 transitions, 38963 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:07,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:07,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:07,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:09,301 INFO L116 PetriNetUnfolderBase]: 1672/3256 cut-off events. [2025-04-14 00:53:09,301 INFO L117 PetriNetUnfolderBase]: For 300480/300483 co-relation queries the response was YES. [2025-04-14 00:53:09,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53741 conditions, 3256 events. 1672/3256 cut-off events. For 300480/300483 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 23008 event pairs, 139 based on Foata normal form. 8/3243 useless extension candidates. Maximal degree in co-relation 53388. Up to 1750 conditions per place. [2025-04-14 00:53:09,338 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 769 selfloop transitions, 196 changer transitions 0/966 dead transitions. [2025-04-14 00:53:09,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 966 transitions, 41659 flow [2025-04-14 00:53:09,339 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-14 00:53:09,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-14 00:53:09,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 137 transitions. [2025-04-14 00:53:09,340 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4228395061728395 [2025-04-14 00:53:09,340 INFO L175 Difference]: Start difference. First operand has 578 places, 922 transitions, 38963 flow. Second operand 18 states and 137 transitions. [2025-04-14 00:53:09,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 966 transitions, 41659 flow [2025-04-14 00:53:11,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 966 transitions, 41602 flow, removed 2 selfloop flow, removed 12 redundant places. [2025-04-14 00:53:11,635 INFO L231 Difference]: Finished difference. Result has 588 places, 930 transitions, 40094 flow [2025-04-14 00:53:11,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=38906, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=40094, PETRI_PLACES=588, PETRI_TRANSITIONS=930} [2025-04-14 00:53:11,635 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 569 predicate places. [2025-04-14 00:53:11,635 INFO L485 AbstractCegarLoop]: Abstraction has has 588 places, 930 transitions, 40094 flow [2025-04-14 00:53:11,636 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:11,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:11,636 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:11,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2025-04-14 00:53:11,836 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:11,836 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:11,837 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:11,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2056295990, now seen corresponding path program 39 times [2025-04-14 00:53:11,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:11,837 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355135840] [2025-04-14 00:53:11,837 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:53:11,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:11,840 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:53:11,843 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:11,843 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:53:11,843 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:11,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:11,947 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355135840] [2025-04-14 00:53:11,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355135840] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:11,947 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875409751] [2025-04-14 00:53:11,947 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:53:11,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:11,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:11,949 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:11,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2025-04-14 00:53:11,971 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:53:11,980 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:11,980 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:53:11,980 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:11,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-04-14 00:53:11,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:12,392 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:12,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875409751] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:12,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:12,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:53:12,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936807222] [2025-04-14 00:53:12,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:12,766 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:53:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:12,767 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:53:12,767 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:53:12,767 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:12,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 930 transitions, 40094 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:12,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:12,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:12,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:15,194 INFO L116 PetriNetUnfolderBase]: 1762/3449 cut-off events. [2025-04-14 00:53:15,194 INFO L117 PetriNetUnfolderBase]: For 345298/345301 co-relation queries the response was YES. [2025-04-14 00:53:15,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58347 conditions, 3449 events. 1762/3449 cut-off events. For 345298/345301 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 24875 event pairs, 5 based on Foata normal form. 8/3436 useless extension candidates. Maximal degree in co-relation 57977. Up to 2313 conditions per place. [2025-04-14 00:53:15,238 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 691 selfloop transitions, 350 changer transitions 0/1042 dead transitions. [2025-04-14 00:53:15,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 613 places, 1042 transitions, 45791 flow [2025-04-14 00:53:15,239 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-04-14 00:53:15,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-04-14 00:53:15,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 205 transitions. [2025-04-14 00:53:15,239 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.43803418803418803 [2025-04-14 00:53:15,239 INFO L175 Difference]: Start difference. First operand has 588 places, 930 transitions, 40094 flow. Second operand 26 states and 205 transitions. [2025-04-14 00:53:15,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 613 places, 1042 transitions, 45791 flow [2025-04-14 00:53:17,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1042 transitions, 45639 flow, removed 63 selfloop flow, removed 6 redundant places. [2025-04-14 00:53:17,882 INFO L231 Difference]: Finished difference. Result has 613 places, 978 transitions, 43644 flow [2025-04-14 00:53:17,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=39970, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=43644, PETRI_PLACES=613, PETRI_TRANSITIONS=978} [2025-04-14 00:53:17,883 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 594 predicate places. [2025-04-14 00:53:17,883 INFO L485 AbstractCegarLoop]: Abstraction has has 613 places, 978 transitions, 43644 flow [2025-04-14 00:53:17,883 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:17,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:17,884 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:17,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2025-04-14 00:53:18,084 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2025-04-14 00:53:18,084 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:18,085 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:18,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2053816610, now seen corresponding path program 40 times [2025-04-14 00:53:18,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:18,085 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59990210] [2025-04-14 00:53:18,085 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:53:18,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:18,088 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:18,090 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:18,090 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:53:18,090 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:18,189 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:18,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:18,189 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59990210] [2025-04-14 00:53:18,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59990210] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:18,189 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925230515] [2025-04-14 00:53:18,189 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:53:18,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:18,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:18,191 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:18,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2025-04-14 00:53:18,213 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:18,221 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:18,221 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:53:18,221 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:18,221 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:18,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:18,527 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925230515] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:18,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:18,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:53:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352126547] [2025-04-14 00:53:18,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:18,833 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:53:18,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:18,833 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:53:18,833 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:53:18,833 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:18,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 978 transitions, 43644 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:18,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:18,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:18,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:21,024 INFO L116 PetriNetUnfolderBase]: 1802/3530 cut-off events. [2025-04-14 00:53:21,024 INFO L117 PetriNetUnfolderBase]: For 387843/387846 co-relation queries the response was YES. [2025-04-14 00:53:21,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61414 conditions, 3530 events. 1802/3530 cut-off events. For 387843/387846 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 25693 event pairs, 74 based on Foata normal form. 8/3517 useless extension candidates. Maximal degree in co-relation 61037. Up to 2538 conditions per place. [2025-04-14 00:53:21,069 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 709 selfloop transitions, 333 changer transitions 0/1043 dead transitions. [2025-04-14 00:53:21,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 1043 transitions, 47549 flow [2025-04-14 00:53:21,069 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2025-04-14 00:53:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2025-04-14 00:53:21,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 162 transitions. [2025-04-14 00:53:21,070 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45 [2025-04-14 00:53:21,070 INFO L175 Difference]: Start difference. First operand has 613 places, 978 transitions, 43644 flow. Second operand 20 states and 162 transitions. [2025-04-14 00:53:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 1043 transitions, 47549 flow [2025-04-14 00:53:24,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 620 places, 1043 transitions, 46742 flow, removed 375 selfloop flow, removed 12 redundant places. [2025-04-14 00:53:24,135 INFO L231 Difference]: Finished difference. Result has 625 places, 1000 transitions, 45750 flow [2025-04-14 00:53:24,135 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=42974, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=45750, PETRI_PLACES=625, PETRI_TRANSITIONS=1000} [2025-04-14 00:53:24,136 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 606 predicate places. [2025-04-14 00:53:24,136 INFO L485 AbstractCegarLoop]: Abstraction has has 625 places, 1000 transitions, 45750 flow [2025-04-14 00:53:24,136 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:24,136 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:24,136 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:24,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2025-04-14 00:53:24,336 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2025-04-14 00:53:24,337 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:24,337 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:24,337 INFO L85 PathProgramCache]: Analyzing trace with hash -280656290, now seen corresponding path program 41 times [2025-04-14 00:53:24,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:24,337 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614056523] [2025-04-14 00:53:24,338 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:53:24,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:24,341 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:24,344 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:24,344 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:24,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:24,447 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614056523] [2025-04-14 00:53:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614056523] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:24,447 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600420592] [2025-04-14 00:53:24,447 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:53:24,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:24,449 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:24,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2025-04-14 00:53:24,471 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:24,480 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:24,480 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:24,480 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:24,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:24,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:24,791 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600420592] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:25,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:25,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:53:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250599019] [2025-04-14 00:53:25,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:25,090 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:53:25,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:25,090 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:53:25,090 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:53:25,091 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:25,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 1000 transitions, 45750 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:25,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:25,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:25,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:26,842 INFO L116 PetriNetUnfolderBase]: 1798/3516 cut-off events. [2025-04-14 00:53:26,842 INFO L117 PetriNetUnfolderBase]: For 401466/401469 co-relation queries the response was YES. [2025-04-14 00:53:26,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61842 conditions, 3516 events. 1798/3516 cut-off events. For 401466/401469 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 25386 event pairs, 148 based on Foata normal form. 8/3503 useless extension candidates. Maximal degree in co-relation 61461. Up to 1904 conditions per place. [2025-04-14 00:53:26,885 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 815 selfloop transitions, 211 changer transitions 0/1027 dead transitions. [2025-04-14 00:53:26,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 640 places, 1027 transitions, 47918 flow [2025-04-14 00:53:26,885 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-04-14 00:53:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-04-14 00:53:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 112 transitions. [2025-04-14 00:53:26,886 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-04-14 00:53:26,886 INFO L175 Difference]: Start difference. First operand has 625 places, 1000 transitions, 45750 flow. Second operand 16 states and 112 transitions. [2025-04-14 00:53:26,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 640 places, 1027 transitions, 47918 flow [2025-04-14 00:53:29,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 1027 transitions, 47709 flow, removed 86 selfloop flow, removed 10 redundant places. [2025-04-14 00:53:29,957 INFO L231 Difference]: Finished difference. Result has 633 places, 1001 transitions, 45932 flow [2025-04-14 00:53:29,958 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=45352, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=45932, PETRI_PLACES=633, PETRI_TRANSITIONS=1001} [2025-04-14 00:53:29,958 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 614 predicate places. [2025-04-14 00:53:29,958 INFO L485 AbstractCegarLoop]: Abstraction has has 633 places, 1001 transitions, 45932 flow [2025-04-14 00:53:29,959 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:29,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:29,959 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:29,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2025-04-14 00:53:30,159 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2025-04-14 00:53:30,159 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:30,160 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:30,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1311729254, now seen corresponding path program 42 times [2025-04-14 00:53:30,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:30,160 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646491870] [2025-04-14 00:53:30,160 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:53:30,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:30,163 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:30,166 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:30,166 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:53:30,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:30,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:30,273 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646491870] [2025-04-14 00:53:30,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646491870] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:30,273 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424528006] [2025-04-14 00:53:30,273 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:53:30,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:30,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:30,275 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:30,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2025-04-14 00:53:30,296 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:30,305 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:30,305 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:53:30,305 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:30,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:30,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:30,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:30,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424528006] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:30,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:30,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:53:30,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540140349] [2025-04-14 00:53:30,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:30,853 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:53:30,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:30,853 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:53:30,853 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:53:30,853 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:30,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 633 places, 1001 transitions, 45932 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:30,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:30,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:30,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:33,161 INFO L116 PetriNetUnfolderBase]: 1875/3664 cut-off events. [2025-04-14 00:53:33,161 INFO L117 PetriNetUnfolderBase]: For 431183/431186 co-relation queries the response was YES. [2025-04-14 00:53:33,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64459 conditions, 3664 events. 1875/3664 cut-off events. For 431183/431186 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 26716 event pairs, 148 based on Foata normal form. 12/3655 useless extension candidates. Maximal degree in co-relation 64082. Up to 1907 conditions per place. [2025-04-14 00:53:33,208 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 812 selfloop transitions, 279 changer transitions 0/1092 dead transitions. [2025-04-14 00:53:33,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 657 places, 1092 transitions, 50369 flow [2025-04-14 00:53:33,208 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 00:53:33,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 00:53:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 188 transitions. [2025-04-14 00:53:33,209 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4177777777777778 [2025-04-14 00:53:33,209 INFO L175 Difference]: Start difference. First operand has 633 places, 1001 transitions, 45932 flow. Second operand 25 states and 188 transitions. [2025-04-14 00:53:33,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 657 places, 1092 transitions, 50369 flow [2025-04-14 00:53:36,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 1092 transitions, 50219 flow, removed 46 selfloop flow, removed 10 redundant places. [2025-04-14 00:53:36,739 INFO L231 Difference]: Finished difference. Result has 657 places, 1041 transitions, 48410 flow [2025-04-14 00:53:36,740 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=45782, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1001, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=48410, PETRI_PLACES=657, PETRI_TRANSITIONS=1041} [2025-04-14 00:53:36,740 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 638 predicate places. [2025-04-14 00:53:36,740 INFO L485 AbstractCegarLoop]: Abstraction has has 657 places, 1041 transitions, 48410 flow [2025-04-14 00:53:36,740 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:36,740 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:36,740 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:36,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2025-04-14 00:53:36,941 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:36,941 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:36,942 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1265488982, now seen corresponding path program 43 times [2025-04-14 00:53:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:36,942 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357326595] [2025-04-14 00:53:36,942 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:53:36,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:36,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:53:36,947 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:36,947 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:53:36,947 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:37,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:37,058 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357326595] [2025-04-14 00:53:37,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357326595] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:37,058 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8518469] [2025-04-14 00:53:37,058 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:53:37,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:37,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:37,060 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:37,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2025-04-14 00:53:37,081 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:53:37,089 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:37,089 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:53:37,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:37,089 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:37,090 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:37,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:37,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8518469] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:37,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:37,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-04-14 00:53:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74840207] [2025-04-14 00:53:37,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:37,712 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 00:53:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:37,712 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 00:53:37,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2025-04-14 00:53:37,712 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:37,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 1041 transitions, 48410 flow. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:37,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:37,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:37,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:40,467 INFO L116 PetriNetUnfolderBase]: 1897/3713 cut-off events. [2025-04-14 00:53:40,467 INFO L117 PetriNetUnfolderBase]: For 461586/461589 co-relation queries the response was YES. [2025-04-14 00:53:40,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66426 conditions, 3713 events. 1897/3713 cut-off events. For 461586/461589 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 27246 event pairs, 151 based on Foata normal form. 8/3700 useless extension candidates. Maximal degree in co-relation 66039. Up to 1897 conditions per place. [2025-04-14 00:53:40,520 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 822 selfloop transitions, 292 changer transitions 0/1115 dead transitions. [2025-04-14 00:53:40,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 683 places, 1115 transitions, 52225 flow [2025-04-14 00:53:40,521 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 00:53:40,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 00:53:40,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 207 transitions. [2025-04-14 00:53:40,521 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2025-04-14 00:53:40,521 INFO L175 Difference]: Start difference. First operand has 657 places, 1041 transitions, 48410 flow. Second operand 27 states and 207 transitions. [2025-04-14 00:53:40,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 683 places, 1115 transitions, 52225 flow [2025-04-14 00:53:44,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 1115 transitions, 51722 flow, removed 158 selfloop flow, removed 10 redundant places. [2025-04-14 00:53:44,763 INFO L231 Difference]: Finished difference. Result has 679 places, 1055 transitions, 49748 flow [2025-04-14 00:53:44,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=47912, PETRI_DIFFERENCE_MINUEND_PLACES=647, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=753, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=49748, PETRI_PLACES=679, PETRI_TRANSITIONS=1055} [2025-04-14 00:53:44,764 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 660 predicate places. [2025-04-14 00:53:44,764 INFO L485 AbstractCegarLoop]: Abstraction has has 679 places, 1055 transitions, 49748 flow [2025-04-14 00:53:44,764 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:44,764 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:44,765 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:44,770 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2025-04-14 00:53:44,965 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:44,965 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:44,966 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash 254561946, now seen corresponding path program 44 times [2025-04-14 00:53:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:44,966 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418092078] [2025-04-14 00:53:44,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:53:44,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:44,969 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:44,972 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:44,972 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:44,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:45,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:45,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:45,065 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418092078] [2025-04-14 00:53:45,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418092078] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:45,065 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940030937] [2025-04-14 00:53:45,065 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:53:45,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:45,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:45,067 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:45,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2025-04-14 00:53:45,089 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:53:45,097 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:45,097 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:53:45,097 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:45,098 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:45,099 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:45,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:45,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940030937] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:45,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:45,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:53:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406681614] [2025-04-14 00:53:45,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:45,726 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:53:45,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:45,727 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:53:45,727 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:53:45,727 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:45,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 679 places, 1055 transitions, 49748 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:45,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:45,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:45,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:48,296 INFO L116 PetriNetUnfolderBase]: 1956/3813 cut-off events. [2025-04-14 00:53:48,296 INFO L117 PetriNetUnfolderBase]: For 530148/530151 co-relation queries the response was YES. [2025-04-14 00:53:48,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69545 conditions, 3813 events. 1956/3813 cut-off events. For 530148/530151 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 28110 event pairs, 31 based on Foata normal form. 8/3800 useless extension candidates. Maximal degree in co-relation 69152. Up to 1532 conditions per place. [2025-04-14 00:53:48,353 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 607 selfloop transitions, 555 changer transitions 0/1163 dead transitions. [2025-04-14 00:53:48,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 713 places, 1163 transitions, 55265 flow [2025-04-14 00:53:48,353 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 00:53:48,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 00:53:48,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 259 transitions. [2025-04-14 00:53:48,354 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2025-04-14 00:53:48,354 INFO L175 Difference]: Start difference. First operand has 679 places, 1055 transitions, 49748 flow. Second operand 35 states and 259 transitions. [2025-04-14 00:53:48,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 713 places, 1163 transitions, 55265 flow [2025-04-14 00:53:52,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1163 transitions, 54990 flow, removed 76 selfloop flow, removed 15 redundant places. [2025-04-14 00:53:52,578 INFO L231 Difference]: Finished difference. Result has 704 places, 1095 transitions, 53409 flow [2025-04-14 00:53:52,579 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=49473, PETRI_DIFFERENCE_MINUEND_PLACES=664, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=53409, PETRI_PLACES=704, PETRI_TRANSITIONS=1095} [2025-04-14 00:53:52,579 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 685 predicate places. [2025-04-14 00:53:52,580 INFO L485 AbstractCegarLoop]: Abstraction has has 704 places, 1095 transitions, 53409 flow [2025-04-14 00:53:52,580 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:52,580 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:53:52,580 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:53:52,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2025-04-14 00:53:52,780 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:52,780 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:53:52,781 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:53:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash 360022086, now seen corresponding path program 45 times [2025-04-14 00:53:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:53:52,781 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058497648] [2025-04-14 00:53:52,781 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:53:52,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:53:52,784 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:53:52,788 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:52,788 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:53:52,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:52,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:53:52,899 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058497648] [2025-04-14 00:53:52,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058497648] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:53:52,900 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917245304] [2025-04-14 00:53:52,900 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:53:52,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:53:52,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:53:52,901 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:53:52,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2025-04-14 00:53:52,924 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:53:52,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:53:52,939 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:53:52,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:53:52,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:53:52,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:53:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:53,240 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:53:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:53:53,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917245304] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:53:53,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:53:53,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:53:53,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347225794] [2025-04-14 00:53:53,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:53:53,487 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:53:53,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:53:53,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:53:53,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:53:53,487 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:53:53,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 1095 transitions, 53409 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:53:53,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:53:53,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:53:53,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:53:56,599 INFO L116 PetriNetUnfolderBase]: 2000/3908 cut-off events. [2025-04-14 00:53:56,600 INFO L117 PetriNetUnfolderBase]: For 578557/578560 co-relation queries the response was YES. [2025-04-14 00:53:56,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73605 conditions, 3908 events. 2000/3908 cut-off events. For 578557/578560 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 28983 event pairs, 31 based on Foata normal form. 8/3893 useless extension candidates. Maximal degree in co-relation 73207. Up to 1594 conditions per place. [2025-04-14 00:53:56,656 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 418 selfloop transitions, 768 changer transitions 0/1187 dead transitions. [2025-04-14 00:53:56,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 1187 transitions, 57843 flow [2025-04-14 00:53:56,656 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-14 00:53:56,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-14 00:53:56,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 273 transitions. [2025-04-14 00:53:56,657 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4212962962962963 [2025-04-14 00:53:56,657 INFO L175 Difference]: Start difference. First operand has 704 places, 1095 transitions, 53409 flow. Second operand 36 states and 273 transitions. [2025-04-14 00:53:56,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 1187 transitions, 57843 flow [2025-04-14 00:54:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 715 places, 1187 transitions, 56283 flow, removed 375 selfloop flow, removed 24 redundant places. [2025-04-14 00:54:01,477 INFO L231 Difference]: Finished difference. Result has 720 places, 1121 transitions, 55541 flow [2025-04-14 00:54:01,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=51880, PETRI_DIFFERENCE_MINUEND_PLACES=680, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=55541, PETRI_PLACES=720, PETRI_TRANSITIONS=1121} [2025-04-14 00:54:01,478 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 701 predicate places. [2025-04-14 00:54:01,478 INFO L485 AbstractCegarLoop]: Abstraction has has 720 places, 1121 transitions, 55541 flow [2025-04-14 00:54:01,479 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:01,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:54:01,479 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:54:01,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2025-04-14 00:54:01,679 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2025-04-14 00:54:01,679 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:54:01,680 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:54:01,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1383325414, now seen corresponding path program 46 times [2025-04-14 00:54:01,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:54:01,680 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933148448] [2025-04-14 00:54:01,680 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:54:01,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:54:01,683 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:01,686 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:01,686 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:54:01,686 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:01,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:54:01,793 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933148448] [2025-04-14 00:54:01,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933148448] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:54:01,793 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243742774] [2025-04-14 00:54:01,793 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:54:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:54:01,795 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:54:01,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2025-04-14 00:54:01,816 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:01,824 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:01,825 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:54:01,825 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:01,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:54:01,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:54:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:02,183 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:54:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243742774] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:54:02,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:54:02,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:54:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864166968] [2025-04-14 00:54:02,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:54:02,447 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:54:02,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:54:02,447 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:54:02,447 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:54:02,447 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:54:02,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 1121 transitions, 55541 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:02,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:54:02,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:54:02,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:54:05,118 INFO L116 PetriNetUnfolderBase]: 2072/4041 cut-off events. [2025-04-14 00:54:05,118 INFO L117 PetriNetUnfolderBase]: For 631140/631143 co-relation queries the response was YES. [2025-04-14 00:54:05,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78135 conditions, 4041 events. 2072/4041 cut-off events. For 631140/631143 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 30163 event pairs, 80 based on Foata normal form. 6/4024 useless extension candidates. Maximal degree in co-relation 77733. Up to 2743 conditions per place. [2025-04-14 00:54:05,182 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 783 selfloop transitions, 436 changer transitions 0/1220 dead transitions. [2025-04-14 00:54:05,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 744 places, 1220 transitions, 61319 flow [2025-04-14 00:54:05,182 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 00:54:05,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 00:54:05,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 207 transitions. [2025-04-14 00:54:05,183 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.46 [2025-04-14 00:54:05,183 INFO L175 Difference]: Start difference. First operand has 720 places, 1121 transitions, 55541 flow. Second operand 25 states and 207 transitions. [2025-04-14 00:54:05,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 744 places, 1220 transitions, 61319 flow [2025-04-14 00:54:10,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 726 places, 1220 transitions, 60729 flow, removed 217 selfloop flow, removed 18 redundant places. [2025-04-14 00:54:10,104 INFO L231 Difference]: Finished difference. Result has 733 places, 1162 transitions, 59533 flow [2025-04-14 00:54:10,105 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=55014, PETRI_DIFFERENCE_MINUEND_PLACES=702, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=708, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=59533, PETRI_PLACES=733, PETRI_TRANSITIONS=1162} [2025-04-14 00:54:10,106 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 714 predicate places. [2025-04-14 00:54:10,106 INFO L485 AbstractCegarLoop]: Abstraction has has 733 places, 1162 transitions, 59533 flow [2025-04-14 00:54:10,106 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:10,106 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:54:10,106 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:54:10,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2025-04-14 00:54:10,306 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2025-04-14 00:54:10,307 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:54:10,307 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:54:10,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1156915588, now seen corresponding path program 47 times [2025-04-14 00:54:10,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:54:10,307 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715036227] [2025-04-14 00:54:10,307 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:54:10,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:54:10,311 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:10,314 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:10,314 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:54:10,314 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:10,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:54:10,409 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715036227] [2025-04-14 00:54:10,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715036227] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:54:10,409 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225873259] [2025-04-14 00:54:10,409 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:54:10,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:10,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:54:10,411 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:54:10,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2025-04-14 00:54:10,433 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:10,443 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:10,443 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:54:10,443 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:10,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:54:10,444 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:54:10,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:10,714 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:54:10,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:10,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225873259] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:54:10,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:54:10,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:54:10,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713485951] [2025-04-14 00:54:10,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:54:10,954 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:54:10,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:54:10,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:54:10,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:54:10,955 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:54:10,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 1162 transitions, 59533 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:10,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:54:10,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:54:10,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:54:13,603 INFO L116 PetriNetUnfolderBase]: 2077/4052 cut-off events. [2025-04-14 00:54:13,603 INFO L117 PetriNetUnfolderBase]: For 652213/652216 co-relation queries the response was YES. [2025-04-14 00:54:13,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79629 conditions, 4052 events. 2077/4052 cut-off events. For 652213/652216 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 30150 event pairs, 155 based on Foata normal form. 6/4033 useless extension candidates. Maximal degree in co-relation 79218. Up to 2074 conditions per place. [2025-04-14 00:54:13,669 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 894 selfloop transitions, 320 changer transitions 0/1215 dead transitions. [2025-04-14 00:54:13,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 1215 transitions, 62576 flow [2025-04-14 00:54:13,670 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-04-14 00:54:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-04-14 00:54:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 189 transitions. [2025-04-14 00:54:13,670 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2025-04-14 00:54:13,670 INFO L175 Difference]: Start difference. First operand has 733 places, 1162 transitions, 59533 flow. Second operand 27 states and 189 transitions. [2025-04-14 00:54:13,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 1215 transitions, 62576 flow [2025-04-14 00:54:19,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 1215 transitions, 61927 flow, removed 276 selfloop flow, removed 12 redundant places. [2025-04-14 00:54:19,170 INFO L231 Difference]: Finished difference. Result has 750 places, 1166 transitions, 59844 flow [2025-04-14 00:54:19,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=58978, PETRI_DIFFERENCE_MINUEND_PLACES=721, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=59844, PETRI_PLACES=750, PETRI_TRANSITIONS=1166} [2025-04-14 00:54:19,171 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 731 predicate places. [2025-04-14 00:54:19,171 INFO L485 AbstractCegarLoop]: Abstraction has has 750 places, 1166 transitions, 59844 flow [2025-04-14 00:54:19,171 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:19,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:54:19,171 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:54:19,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2025-04-14 00:54:19,371 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:19,372 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:54:19,372 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:54:19,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1380846034, now seen corresponding path program 48 times [2025-04-14 00:54:19,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:54:19,373 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13215341] [2025-04-14 00:54:19,373 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:54:19,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:54:19,376 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:19,378 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:19,378 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:54:19,378 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:19,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:54:19,478 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13215341] [2025-04-14 00:54:19,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13215341] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:54:19,478 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261957332] [2025-04-14 00:54:19,478 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:54:19,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:19,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:54:19,480 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:54:19,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2025-04-14 00:54:19,501 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:19,509 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:19,509 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-04-14 00:54:19,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:19,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:54:19,510 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:54:19,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:19,809 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:54:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:20,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261957332] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:54:20,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:54:20,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:54:20,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821567294] [2025-04-14 00:54:20,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:54:20,058 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:54:20,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:54:20,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:54:20,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:54:20,059 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:54:20,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 750 places, 1166 transitions, 59844 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:20,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:54:20,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:54:20,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:54:22,454 INFO L116 PetriNetUnfolderBase]: 2075/4058 cut-off events. [2025-04-14 00:54:22,454 INFO L117 PetriNetUnfolderBase]: For 672555/672558 co-relation queries the response was YES. [2025-04-14 00:54:22,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79617 conditions, 4058 events. 2075/4058 cut-off events. For 672555/672558 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 30342 event pairs, 76 based on Foata normal form. 8/4041 useless extension candidates. Maximal degree in co-relation 79204. Up to 2716 conditions per place. [2025-04-14 00:54:22,518 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 779 selfloop transitions, 427 changer transitions 0/1207 dead transitions. [2025-04-14 00:54:22,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 767 places, 1207 transitions, 62619 flow [2025-04-14 00:54:22,518 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-04-14 00:54:22,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-04-14 00:54:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 163 transitions. [2025-04-14 00:54:22,519 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4766081871345029 [2025-04-14 00:54:22,519 INFO L175 Difference]: Start difference. First operand has 750 places, 1166 transitions, 59844 flow. Second operand 19 states and 163 transitions. [2025-04-14 00:54:22,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 767 places, 1207 transitions, 62619 flow [2025-04-14 00:54:27,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 753 places, 1207 transitions, 62320 flow, removed 72 selfloop flow, removed 14 redundant places. [2025-04-14 00:54:27,668 INFO L231 Difference]: Finished difference. Result has 753 places, 1166 transitions, 60408 flow [2025-04-14 00:54:27,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=59478, PETRI_DIFFERENCE_MINUEND_PLACES=735, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=426, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=60408, PETRI_PLACES=753, PETRI_TRANSITIONS=1166} [2025-04-14 00:54:27,670 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 734 predicate places. [2025-04-14 00:54:27,670 INFO L485 AbstractCegarLoop]: Abstraction has has 753 places, 1166 transitions, 60408 flow [2025-04-14 00:54:27,670 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:27,670 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:54:27,670 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:54:27,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2025-04-14 00:54:27,871 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2025-04-14 00:54:27,871 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:54:27,872 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:54:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1138481562, now seen corresponding path program 49 times [2025-04-14 00:54:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:54:27,872 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968021828] [2025-04-14 00:54:27,872 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:54:27,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:54:27,875 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:54:27,877 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:27,877 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:54:27,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:27,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:54:27,991 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968021828] [2025-04-14 00:54:27,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968021828] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:54:27,991 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53753355] [2025-04-14 00:54:27,991 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:54:27,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:27,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:54:27,993 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:54:27,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2025-04-14 00:54:28,014 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:54:28,022 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:28,022 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:54:28,022 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:28,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:54:28,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:54:28,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:28,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:54:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:28,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53753355] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:54:28,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:54:28,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-04-14 00:54:28,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810660666] [2025-04-14 00:54:28,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:54:28,570 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 00:54:28,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:54:28,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 00:54:28,570 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2025-04-14 00:54:28,570 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:54:28,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 753 places, 1166 transitions, 60408 flow. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:28,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:54:28,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:54:28,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:54:31,301 INFO L116 PetriNetUnfolderBase]: 2072/4050 cut-off events. [2025-04-14 00:54:31,301 INFO L117 PetriNetUnfolderBase]: For 677723/677726 co-relation queries the response was YES. [2025-04-14 00:54:31,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80149 conditions, 4050 events. 2072/4050 cut-off events. For 677723/677726 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30176 event pairs, 155 based on Foata normal form. 6/4031 useless extension candidates. Maximal degree in co-relation 79735. Up to 2078 conditions per place. [2025-04-14 00:54:31,361 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 901 selfloop transitions, 308 changer transitions 0/1210 dead transitions. [2025-04-14 00:54:31,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 775 places, 1210 transitions, 63077 flow [2025-04-14 00:54:31,361 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2025-04-14 00:54:31,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2025-04-14 00:54:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 170 transitions. [2025-04-14 00:54:31,362 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4106280193236715 [2025-04-14 00:54:31,362 INFO L175 Difference]: Start difference. First operand has 753 places, 1166 transitions, 60408 flow. Second operand 23 states and 170 transitions. [2025-04-14 00:54:31,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 775 places, 1210 transitions, 63077 flow [2025-04-14 00:54:36,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 763 places, 1210 transitions, 62900 flow, removed 16 selfloop flow, removed 12 redundant places. [2025-04-14 00:54:36,853 INFO L231 Difference]: Finished difference. Result has 766 places, 1167 transitions, 61022 flow [2025-04-14 00:54:36,853 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=60058, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=856, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=61022, PETRI_PLACES=766, PETRI_TRANSITIONS=1167} [2025-04-14 00:54:36,854 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 747 predicate places. [2025-04-14 00:54:36,854 INFO L485 AbstractCegarLoop]: Abstraction has has 766 places, 1167 transitions, 61022 flow [2025-04-14 00:54:36,854 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:36,854 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:54:36,854 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:54:36,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2025-04-14 00:54:37,054 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2025-04-14 00:54:37,055 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:54:37,055 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:54:37,055 INFO L85 PathProgramCache]: Analyzing trace with hash 362501466, now seen corresponding path program 50 times [2025-04-14 00:54:37,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:54:37,055 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073716292] [2025-04-14 00:54:37,055 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:54:37,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:54:37,058 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:37,061 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:37,061 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:54:37,061 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:37,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:54:37,169 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073716292] [2025-04-14 00:54:37,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073716292] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:54:37,169 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637766697] [2025-04-14 00:54:37,169 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:54:37,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:37,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:54:37,171 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:54:37,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2025-04-14 00:54:37,192 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:37,200 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:37,200 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:54:37,200 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:37,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:54:37,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:54:37,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:37,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:54:37,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:37,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637766697] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:54:37,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:54:37,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:54:37,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584630439] [2025-04-14 00:54:37,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:54:37,792 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:54:37,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:54:37,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:54:37,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:54:37,792 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:54:37,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 1167 transitions, 61022 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:37,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:54:37,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:54:37,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:54:40,822 INFO L116 PetriNetUnfolderBase]: 2070/4038 cut-off events. [2025-04-14 00:54:40,823 INFO L117 PetriNetUnfolderBase]: For 711454/711457 co-relation queries the response was YES. [2025-04-14 00:54:40,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80501 conditions, 4038 events. 2070/4038 cut-off events. For 711454/711457 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 29987 event pairs, 3 based on Foata normal form. 6/4019 useless extension candidates. Maximal degree in co-relation 80085. Up to 1715 conditions per place. [2025-04-14 00:54:40,883 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 433 selfloop transitions, 788 changer transitions 0/1222 dead transitions. [2025-04-14 00:54:40,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 796 places, 1222 transitions, 63490 flow [2025-04-14 00:54:40,883 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2025-04-14 00:54:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2025-04-14 00:54:40,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 250 transitions. [2025-04-14 00:54:40,884 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4208754208754209 [2025-04-14 00:54:40,884 INFO L175 Difference]: Start difference. First operand has 766 places, 1167 transitions, 61022 flow. Second operand 33 states and 250 transitions. [2025-04-14 00:54:40,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 796 places, 1222 transitions, 63490 flow [2025-04-14 00:54:46,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 1222 transitions, 63275 flow, removed 26 selfloop flow, removed 18 redundant places. [2025-04-14 00:54:46,395 INFO L231 Difference]: Finished difference. Result has 778 places, 1165 transitions, 62217 flow [2025-04-14 00:54:46,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=60641, PETRI_DIFFERENCE_MINUEND_PLACES=746, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=788, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=62217, PETRI_PLACES=778, PETRI_TRANSITIONS=1165} [2025-04-14 00:54:46,396 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 759 predicate places. [2025-04-14 00:54:46,397 INFO L485 AbstractCegarLoop]: Abstraction has has 778 places, 1165 transitions, 62217 flow [2025-04-14 00:54:46,397 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:46,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:54:46,397 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:54:46,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2025-04-14 00:54:46,597 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:46,597 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:54:46,598 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:54:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1358321620, now seen corresponding path program 51 times [2025-04-14 00:54:46,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:54:46,598 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514461460] [2025-04-14 00:54:46,598 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:54:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:54:46,601 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:54:46,604 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:46,604 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:54:46,604 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:46,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:46,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:54:46,711 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514461460] [2025-04-14 00:54:46,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514461460] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:54:46,711 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032946615] [2025-04-14 00:54:46,711 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:54:46,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:46,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:54:46,713 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:54:46,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2025-04-14 00:54:46,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:54:46,743 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:46,743 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:54:46,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:46,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:54:46,744 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:54:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:47,113 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:54:47,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032946615] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:54:47,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:54:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:54:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336577094] [2025-04-14 00:54:47,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:54:47,354 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:54:47,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:54:47,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:54:47,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:54:47,354 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:54:47,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 778 places, 1165 transitions, 62217 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:47,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:54:47,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:54:47,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:54:50,426 INFO L116 PetriNetUnfolderBase]: 2152/4198 cut-off events. [2025-04-14 00:54:50,426 INFO L117 PetriNetUnfolderBase]: For 791112/791115 co-relation queries the response was YES. [2025-04-14 00:54:50,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86399 conditions, 4198 events. 2152/4198 cut-off events. For 791112/791115 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 31609 event pairs, 5 based on Foata normal form. 8/4179 useless extension candidates. Maximal degree in co-relation 86032. Up to 1693 conditions per place. [2025-04-14 00:54:50,491 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 472 selfloop transitions, 802 changer transitions 0/1275 dead transitions. [2025-04-14 00:54:50,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 1275 transitions, 68712 flow [2025-04-14 00:54:50,492 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2025-04-14 00:54:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2025-04-14 00:54:50,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 255 transitions. [2025-04-14 00:54:50,493 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2025-04-14 00:54:50,493 INFO L175 Difference]: Start difference. First operand has 778 places, 1165 transitions, 62217 flow. Second operand 34 states and 255 transitions. [2025-04-14 00:54:50,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 1275 transitions, 68712 flow [2025-04-14 00:54:56,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 782 places, 1275 transitions, 67399 flow, removed 0 selfloop flow, removed 29 redundant places. [2025-04-14 00:54:56,449 INFO L231 Difference]: Finished difference. Result has 787 places, 1216 transitions, 66569 flow [2025-04-14 00:54:56,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=60957, PETRI_DIFFERENCE_MINUEND_PLACES=749, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=66569, PETRI_PLACES=787, PETRI_TRANSITIONS=1216} [2025-04-14 00:54:56,450 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 768 predicate places. [2025-04-14 00:54:56,450 INFO L485 AbstractCegarLoop]: Abstraction has has 787 places, 1216 transitions, 66569 flow [2025-04-14 00:54:56,450 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:56,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:54:56,450 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:54:56,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2025-04-14 00:54:56,651 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:56,651 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:54:56,652 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:54:56,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1207598342, now seen corresponding path program 52 times [2025-04-14 00:54:56,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:54:56,652 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717794328] [2025-04-14 00:54:56,652 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:54:56,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:54:56,655 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:56,657 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:56,657 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:54:56,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:56,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:54:56,751 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717794328] [2025-04-14 00:54:56,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717794328] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:54:56,751 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517906145] [2025-04-14 00:54:56,751 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:54:56,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:54:56,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:54:56,753 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:54:56,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2025-04-14 00:54:56,774 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:54:56,783 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:54:56,783 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:54:56,783 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:54:56,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:54:56,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:54:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:57,116 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:54:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:54:57,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517906145] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:54:57,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:54:57,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:54:57,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127612691] [2025-04-14 00:54:57,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:54:57,355 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:54:57,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:54:57,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:54:57,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:54:57,355 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:54:57,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 787 places, 1216 transitions, 66569 flow. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:54:57,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:54:57,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:54:57,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:55:00,111 INFO L116 PetriNetUnfolderBase]: 2191/4281 cut-off events. [2025-04-14 00:55:00,111 INFO L117 PetriNetUnfolderBase]: For 833283/833286 co-relation queries the response was YES. [2025-04-14 00:55:00,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89690 conditions, 4281 events. 2191/4281 cut-off events. For 833283/833286 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 32449 event pairs, 78 based on Foata normal form. 8/4264 useless extension candidates. Maximal degree in co-relation 89318. Up to 2888 conditions per place. [2025-04-14 00:55:00,181 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 823 selfloop transitions, 460 changer transitions 0/1284 dead transitions. [2025-04-14 00:55:00,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 808 places, 1284 transitions, 71562 flow [2025-04-14 00:55:00,181 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-04-14 00:55:00,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-04-14 00:55:00,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 183 transitions. [2025-04-14 00:55:00,182 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2025-04-14 00:55:00,182 INFO L175 Difference]: Start difference. First operand has 787 places, 1216 transitions, 66569 flow. Second operand 22 states and 183 transitions. [2025-04-14 00:55:00,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 808 places, 1284 transitions, 71562 flow [2025-04-14 00:55:06,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 786 places, 1284 transitions, 70832 flow, removed 258 selfloop flow, removed 22 redundant places. [2025-04-14 00:55:06,869 INFO L231 Difference]: Finished difference. Result has 788 places, 1238 transitions, 68811 flow [2025-04-14 00:55:06,870 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=65839, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=445, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=771, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=68811, PETRI_PLACES=788, PETRI_TRANSITIONS=1238} [2025-04-14 00:55:06,870 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 769 predicate places. [2025-04-14 00:55:06,870 INFO L485 AbstractCegarLoop]: Abstraction has has 788 places, 1238 transitions, 68811 flow [2025-04-14 00:55:06,870 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 21 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:06,870 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:55:06,870 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:55:06,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2025-04-14 00:55:07,071 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2025-04-14 00:55:07,071 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:55:07,072 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:55:07,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1438736674, now seen corresponding path program 53 times [2025-04-14 00:55:07,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:55:07,072 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806086734] [2025-04-14 00:55:07,072 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:55:07,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:55:07,075 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:55:07,077 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:07,077 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:55:07,077 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:07,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:55:07,185 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806086734] [2025-04-14 00:55:07,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806086734] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:55:07,185 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672099876] [2025-04-14 00:55:07,185 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:55:07,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:55:07,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:55:07,187 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:55:07,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2025-04-14 00:55:07,209 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:55:07,217 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:07,217 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:55:07,217 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:07,217 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:55:07,218 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:55:07,593 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:07,593 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:55:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672099876] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:55:07,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:55:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:55:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63798886] [2025-04-14 00:55:07,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:55:07,867 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:55:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:55:07,867 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:55:07,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:55:07,868 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:55:07,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1238 transitions, 68811 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:07,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:55:07,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:55:07,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:55:11,180 INFO L116 PetriNetUnfolderBase]: 2192/4281 cut-off events. [2025-04-14 00:55:11,180 INFO L117 PetriNetUnfolderBase]: For 838400/838403 co-relation queries the response was YES. [2025-04-14 00:55:11,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90112 conditions, 4281 events. 2192/4281 cut-off events. For 838400/838403 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 32330 event pairs, 10 based on Foata normal form. 8/4264 useless extension candidates. Maximal degree in co-relation 89690. Up to 1795 conditions per place. [2025-04-14 00:55:11,248 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 841 selfloop transitions, 454 changer transitions 0/1296 dead transitions. [2025-04-14 00:55:11,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 816 places, 1296 transitions, 71877 flow [2025-04-14 00:55:11,249 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-04-14 00:55:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-04-14 00:55:11,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 215 transitions. [2025-04-14 00:55:11,250 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4118773946360153 [2025-04-14 00:55:11,250 INFO L175 Difference]: Start difference. First operand has 788 places, 1238 transitions, 68811 flow. Second operand 29 states and 215 transitions. [2025-04-14 00:55:11,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 816 places, 1296 transitions, 71877 flow [2025-04-14 00:55:17,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 1296 transitions, 71385 flow, removed 163 selfloop flow, removed 15 redundant places. [2025-04-14 00:55:17,840 INFO L231 Difference]: Finished difference. Result has 805 places, 1242 transitions, 69469 flow [2025-04-14 00:55:17,841 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=68221, PETRI_DIFFERENCE_MINUEND_PLACES=773, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=449, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=69469, PETRI_PLACES=805, PETRI_TRANSITIONS=1242} [2025-04-14 00:55:17,841 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 786 predicate places. [2025-04-14 00:55:17,842 INFO L485 AbstractCegarLoop]: Abstraction has has 805 places, 1242 transitions, 69469 flow [2025-04-14 00:55:17,842 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:17,842 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:55:17,842 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:55:17,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2025-04-14 00:55:18,042 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:55:18,042 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:55:18,043 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:55:18,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1355842240, now seen corresponding path program 54 times [2025-04-14 00:55:18,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:55:18,043 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419795213] [2025-04-14 00:55:18,043 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:55:18,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:55:18,046 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:55:18,049 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:18,049 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:55:18,049 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:18,161 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:18,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:55:18,161 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419795213] [2025-04-14 00:55:18,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419795213] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:55:18,161 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848404498] [2025-04-14 00:55:18,161 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:55:18,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:55:18,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:55:18,163 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:55:18,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2025-04-14 00:55:18,185 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 16 statements into 3 equivalence classes. [2025-04-14 00:55:18,194 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:18,194 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:55:18,194 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:18,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:55:18,195 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:55:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:18,528 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:55:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:18,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848404498] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:55:18,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:55:18,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2025-04-14 00:55:18,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910931521] [2025-04-14 00:55:18,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:55:18,776 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-14 00:55:18,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:55:18,777 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-14 00:55:18,777 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2025-04-14 00:55:18,777 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:55:18,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 805 places, 1242 transitions, 69469 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:18,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:55:18,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:55:18,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:55:22,067 INFO L116 PetriNetUnfolderBase]: 2190/4269 cut-off events. [2025-04-14 00:55:22,067 INFO L117 PetriNetUnfolderBase]: For 846392/846395 co-relation queries the response was YES. [2025-04-14 00:55:22,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90598 conditions, 4269 events. 2190/4269 cut-off events. For 846392/846395 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 32127 event pairs, 28 based on Foata normal form. 6/4250 useless extension candidates. Maximal degree in co-relation 90159. Up to 1775 conditions per place. [2025-04-14 00:55:22,143 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 492 selfloop transitions, 810 changer transitions 0/1303 dead transitions. [2025-04-14 00:55:22,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 839 places, 1303 transitions, 72128 flow [2025-04-14 00:55:22,144 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2025-04-14 00:55:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2025-04-14 00:55:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 259 transitions. [2025-04-14 00:55:22,144 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2025-04-14 00:55:22,144 INFO L175 Difference]: Start difference. First operand has 805 places, 1242 transitions, 69469 flow. Second operand 35 states and 259 transitions. [2025-04-14 00:55:22,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 839 places, 1303 transitions, 72128 flow [2025-04-14 00:55:28,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 819 places, 1303 transitions, 71877 flow, removed 39 selfloop flow, removed 20 redundant places. [2025-04-14 00:55:28,964 INFO L231 Difference]: Finished difference. Result has 819 places, 1240 transitions, 70676 flow [2025-04-14 00:55:28,965 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=69056, PETRI_DIFFERENCE_MINUEND_PLACES=785, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=810, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=70676, PETRI_PLACES=819, PETRI_TRANSITIONS=1240} [2025-04-14 00:55:28,965 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 800 predicate places. [2025-04-14 00:55:28,966 INFO L485 AbstractCegarLoop]: Abstraction has has 819 places, 1240 transitions, 70676 flow [2025-04-14 00:55:28,966 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:28,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:55:28,966 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:55:28,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2025-04-14 00:55:29,166 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2025-04-14 00:55:29,167 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:55:29,167 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:55:29,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1210077722, now seen corresponding path program 55 times [2025-04-14 00:55:29,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:55:29,167 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234658526] [2025-04-14 00:55:29,167 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:55:29,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:55:29,170 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:55:29,173 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:29,173 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:55:29,173 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:29,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:29,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:55:29,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234658526] [2025-04-14 00:55:29,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234658526] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:55:29,291 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177696141] [2025-04-14 00:55:29,291 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:55:29,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:55:29,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:55:29,293 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:55:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2025-04-14 00:55:29,315 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-04-14 00:55:29,323 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:29,324 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:55:29,324 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:29,324 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:55:29,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:55:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:29,636 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:55:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:29,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177696141] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:55:29,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:55:29,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2025-04-14 00:55:29,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024047992] [2025-04-14 00:55:29,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:55:29,950 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-04-14 00:55:29,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:55:29,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-04-14 00:55:29,951 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-04-14 00:55:29,951 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:55:29,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 819 places, 1240 transitions, 70676 flow. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:29,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:55:29,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:55:29,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:55:32,965 INFO L116 PetriNetUnfolderBase]: 2188/4257 cut-off events. [2025-04-14 00:55:32,965 INFO L117 PetriNetUnfolderBase]: For 885338/885341 co-relation queries the response was YES. [2025-04-14 00:55:33,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92138 conditions, 4257 events. 2188/4257 cut-off events. For 885338/885341 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 32099 event pairs, 82 based on Foata normal form. 6/4238 useless extension candidates. Maximal degree in co-relation 91750. Up to 2926 conditions per place. [2025-04-14 00:55:33,042 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 834 selfloop transitions, 457 changer transitions 0/1292 dead transitions. [2025-04-14 00:55:33,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 1292 transitions, 73499 flow [2025-04-14 00:55:33,042 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2025-04-14 00:55:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2025-04-14 00:55:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 206 transitions. [2025-04-14 00:55:33,043 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4577777777777778 [2025-04-14 00:55:33,043 INFO L175 Difference]: Start difference. First operand has 819 places, 1240 transitions, 70676 flow. Second operand 25 states and 206 transitions. [2025-04-14 00:55:33,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 1292 transitions, 73499 flow [2025-04-14 00:55:39,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 811 places, 1292 transitions, 71855 flow, removed 11 selfloop flow, removed 32 redundant places. [2025-04-14 00:55:39,584 INFO L231 Difference]: Finished difference. Result has 813 places, 1240 transitions, 69972 flow [2025-04-14 00:55:39,585 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=68854, PETRI_DIFFERENCE_MINUEND_PLACES=787, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=782, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=69972, PETRI_PLACES=813, PETRI_TRANSITIONS=1240} [2025-04-14 00:55:39,587 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 794 predicate places. [2025-04-14 00:55:39,587 INFO L485 AbstractCegarLoop]: Abstraction has has 813 places, 1240 transitions, 69972 flow [2025-04-14 00:55:39,587 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 23 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:39,587 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:55:39,587 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:55:39,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2025-04-14 00:55:39,787 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2025-04-14 00:55:39,788 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:55:39,789 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:55:39,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1300430980, now seen corresponding path program 56 times [2025-04-14 00:55:39,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:55:39,789 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974722278] [2025-04-14 00:55:39,789 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:55:39,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:55:39,793 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:55:39,796 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:39,796 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:55:39,796 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:39,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:39,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:55:39,973 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974722278] [2025-04-14 00:55:39,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974722278] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:55:39,973 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276592326] [2025-04-14 00:55:39,973 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:55:39,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:55:39,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:55:39,975 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:55:39,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2025-04-14 00:55:39,996 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-04-14 00:55:40,004 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-04-14 00:55:40,005 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:55:40,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:40,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:55:40,006 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:55:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:40,326 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:55:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:40,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276592326] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:55:40,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:55:40,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2025-04-14 00:55:40,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020894899] [2025-04-14 00:55:40,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:55:40,601 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-14 00:55:40,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:55:40,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-14 00:55:40,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2025-04-14 00:55:40,602 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:55:40,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 813 places, 1240 transitions, 69972 flow. Second operand has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:40,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:55:40,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:55:40,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:55:43,805 INFO L116 PetriNetUnfolderBase]: 2197/4281 cut-off events. [2025-04-14 00:55:43,805 INFO L117 PetriNetUnfolderBase]: For 876326/876329 co-relation queries the response was YES. [2025-04-14 00:55:43,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91639 conditions, 4281 events. 2197/4281 cut-off events. For 876326/876329 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 32216 event pairs, 154 based on Foata normal form. 8/4264 useless extension candidates. Maximal degree in co-relation 91249. Up to 2141 conditions per place. [2025-04-14 00:55:43,879 INFO L140 encePairwiseOnDemand]: 12/18 looper letters, 712 selfloop transitions, 584 changer transitions 0/1297 dead transitions. [2025-04-14 00:55:43,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 1297 transitions, 73084 flow [2025-04-14 00:55:43,879 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2025-04-14 00:55:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2025-04-14 00:55:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 225 transitions. [2025-04-14 00:55:43,880 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2025-04-14 00:55:43,880 INFO L175 Difference]: Start difference. First operand has 813 places, 1240 transitions, 69972 flow. Second operand 31 states and 225 transitions. [2025-04-14 00:55:43,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 1297 transitions, 73084 flow [2025-04-14 00:55:51,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 824 places, 1297 transitions, 72393 flow, removed 77 selfloop flow, removed 19 redundant places. [2025-04-14 00:55:51,309 INFO L231 Difference]: Finished difference. Result has 826 places, 1242 transitions, 70728 flow [2025-04-14 00:55:51,310 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=69174, PETRI_DIFFERENCE_MINUEND_PLACES=794, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=581, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=70728, PETRI_PLACES=826, PETRI_TRANSITIONS=1242} [2025-04-14 00:55:51,319 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 807 predicate places. [2025-04-14 00:55:51,320 INFO L485 AbstractCegarLoop]: Abstraction has has 826 places, 1242 transitions, 70728 flow [2025-04-14 00:55:51,320 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.7272727272727275) internal successors, (104), 22 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:51,320 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:55:51,320 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:55:51,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2025-04-14 00:55:51,520 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:55:51,520 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:55:51,521 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:55:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1899752142, now seen corresponding path program 57 times [2025-04-14 00:55:51,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:55:51,521 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472723567] [2025-04-14 00:55:51,521 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:55:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:55:51,523 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:55:51,528 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:55:51,528 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:55:51,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:51,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:55:51,822 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472723567] [2025-04-14 00:55:51,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472723567] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:55:51,822 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799157237] [2025-04-14 00:55:51,822 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:55:51,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:55:51,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:55:51,824 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:55:51,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2025-04-14 00:55:51,849 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:55:51,897 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:55:51,897 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:55:51,897 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:55:51,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 00:55:51,899 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:55:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:53,010 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:55:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:55:54,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799157237] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:55:54,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:55:54,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2025-04-14 00:55:54,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438704649] [2025-04-14 00:55:54,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:55:54,328 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:55:54,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:55:54,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:55:54,329 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:55:54,329 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:55:54,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 1242 transitions, 70728 flow. Second operand has 28 states, 28 states have (on average 4.642857142857143) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:55:54,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:55:54,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:55:54,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:56:01,792 INFO L116 PetriNetUnfolderBase]: 2265/4434 cut-off events. [2025-04-14 00:56:01,792 INFO L117 PetriNetUnfolderBase]: For 921535/921538 co-relation queries the response was YES. [2025-04-14 00:56:01,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95078 conditions, 4434 events. 2265/4434 cut-off events. For 921535/921538 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 33831 event pairs, 0 based on Foata normal form. 7/4416 useless extension candidates. Maximal degree in co-relation 94672. Up to 1778 conditions per place. [2025-04-14 00:56:01,867 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 510 selfloop transitions, 851 changer transitions 11/1373 dead transitions. [2025-04-14 00:56:01,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 863 places, 1373 transitions, 76120 flow [2025-04-14 00:56:01,868 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-04-14 00:56:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2025-04-14 00:56:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 291 transitions. [2025-04-14 00:56:01,869 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.42543859649122806 [2025-04-14 00:56:01,869 INFO L175 Difference]: Start difference. First operand has 826 places, 1242 transitions, 70728 flow. Second operand 38 states and 291 transitions. [2025-04-14 00:56:01,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 863 places, 1373 transitions, 76120 flow [2025-04-14 00:56:09,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 840 places, 1373 transitions, 75872 flow, removed 7 selfloop flow, removed 23 redundant places. [2025-04-14 00:56:09,803 INFO L231 Difference]: Finished difference. Result has 845 places, 1283 transitions, 74564 flow [2025-04-14 00:56:09,804 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=70480, PETRI_DIFFERENCE_MINUEND_PLACES=803, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=815, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=74564, PETRI_PLACES=845, PETRI_TRANSITIONS=1283} [2025-04-14 00:56:09,804 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 826 predicate places. [2025-04-14 00:56:09,805 INFO L485 AbstractCegarLoop]: Abstraction has has 845 places, 1283 transitions, 74564 flow [2025-04-14 00:56:09,805 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.642857142857143) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:56:09,805 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:56:09,805 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:56:09,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2025-04-14 00:56:10,005 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:56:10,006 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:56:10,006 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:56:10,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1825230150, now seen corresponding path program 58 times [2025-04-14 00:56:10,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:56:10,007 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757130188] [2025-04-14 00:56:10,007 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:56:10,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:56:10,010 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:56:10,016 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:56:10,016 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:56:10,016 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:56:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:56:10,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:56:10,382 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757130188] [2025-04-14 00:56:10,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757130188] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:56:10,382 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619085990] [2025-04-14 00:56:10,383 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:56:10,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:56:10,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:56:10,385 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:56:10,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2025-04-14 00:56:10,410 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:56:10,441 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:56:10,442 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:56:10,442 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:56:10,442 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 00:56:10,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:56:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:56:20,582 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:56:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:56:21,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619085990] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:56:21,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:56:21,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2025-04-14 00:56:21,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924544378] [2025-04-14 00:56:21,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:56:21,919 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:56:21,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:56:21,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:56:21,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=614, Unknown=2, NotChecked=0, Total=756 [2025-04-14 00:56:21,919 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:56:21,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 845 places, 1283 transitions, 74564 flow. Second operand has 28 states, 28 states have (on average 4.642857142857143) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:56:21,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:56:21,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:56:21,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:56:36,688 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:57:04,242 INFO L116 PetriNetUnfolderBase]: 2434/4734 cut-off events. [2025-04-14 00:57:04,242 INFO L117 PetriNetUnfolderBase]: For 1040279/1040282 co-relation queries the response was YES. [2025-04-14 00:57:04,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106679 conditions, 4734 events. 2434/4734 cut-off events. For 1040279/1040282 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 36497 event pairs, 0 based on Foata normal form. 4/4715 useless extension candidates. Maximal degree in co-relation 106253. Up to 1778 conditions per place. [2025-04-14 00:57:04,323 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 521 selfloop transitions, 970 changer transitions 12/1504 dead transitions. [2025-04-14 00:57:04,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 1504 transitions, 85968 flow [2025-04-14 00:57:04,323 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-04-14 00:57:04,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-04-14 00:57:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 446 transitions. [2025-04-14 00:57:04,324 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.44246031746031744 [2025-04-14 00:57:04,324 INFO L175 Difference]: Start difference. First operand has 845 places, 1283 transitions, 74564 flow. Second operand 56 states and 446 transitions. [2025-04-14 00:57:04,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 1504 transitions, 85968 flow [2025-04-14 00:57:12,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 873 places, 1504 transitions, 84915 flow, removed 442 selfloop flow, removed 25 redundant places. [2025-04-14 00:57:12,941 INFO L231 Difference]: Finished difference. Result has 878 places, 1377 transitions, 83312 flow [2025-04-14 00:57:12,942 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=73617, PETRI_DIFFERENCE_MINUEND_PLACES=818, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=83312, PETRI_PLACES=878, PETRI_TRANSITIONS=1377} [2025-04-14 00:57:12,943 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 859 predicate places. [2025-04-14 00:57:12,943 INFO L485 AbstractCegarLoop]: Abstraction has has 878 places, 1377 transitions, 83312 flow [2025-04-14 00:57:12,943 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.642857142857143) internal successors, (130), 28 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:57:12,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:57:12,943 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:57:12,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2025-04-14 00:57:13,144 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2025-04-14 00:57:13,144 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:57:13,145 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:57:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1207636921, now seen corresponding path program 59 times [2025-04-14 00:57:13,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:57:13,145 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250076038] [2025-04-14 00:57:13,145 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:57:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:57:13,148 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:57:13,152 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:57:13,152 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:57:13,152 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:57:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:57:13,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:57:13,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250076038] [2025-04-14 00:57:13,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250076038] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:57:13,436 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195910940] [2025-04-14 00:57:13,436 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-14 00:57:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:57:13,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:57:13,438 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:57:13,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2025-04-14 00:57:13,461 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:57:13,482 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:57:13,482 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-04-14 00:57:13,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:57:13,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 00:57:13,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:57:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:57:14,142 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:57:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:57:14,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195910940] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:57:14,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:57:14,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2025-04-14 00:57:14,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199488914] [2025-04-14 00:57:14,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:57:14,977 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-14 00:57:14,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:57:14,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-14 00:57:14,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2025-04-14 00:57:14,977 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:57:14,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 878 places, 1377 transitions, 83312 flow. Second operand has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:57:14,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:57:14,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:57:14,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:57:20,597 INFO L116 PetriNetUnfolderBase]: 2528/4949 cut-off events. [2025-04-14 00:57:20,597 INFO L117 PetriNetUnfolderBase]: For 1098620/1098623 co-relation queries the response was YES. [2025-04-14 00:57:20,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113045 conditions, 4949 events. 2528/4949 cut-off events. For 1098620/1098623 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 38654 event pairs, 0 based on Foata normal form. 11/4937 useless extension candidates. Maximal degree in co-relation 112626. Up to 1725 conditions per place. [2025-04-14 00:57:20,680 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 489 selfloop transitions, 989 changer transitions 29/1508 dead transitions. [2025-04-14 00:57:20,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 907 places, 1508 transitions, 90090 flow [2025-04-14 00:57:20,681 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-14 00:57:20,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-14 00:57:20,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 261 transitions. [2025-04-14 00:57:20,681 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.453125 [2025-04-14 00:57:20,681 INFO L175 Difference]: Start difference. First operand has 878 places, 1377 transitions, 83312 flow. Second operand 32 states and 261 transitions. [2025-04-14 00:57:20,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 907 places, 1508 transitions, 90090 flow [2025-04-14 00:57:30,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 880 places, 1508 transitions, 87884 flow, removed 874 selfloop flow, removed 27 redundant places. [2025-04-14 00:57:30,222 INFO L231 Difference]: Finished difference. Result has 890 places, 1411 transitions, 86163 flow [2025-04-14 00:57:30,223 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=81145, PETRI_DIFFERENCE_MINUEND_PLACES=849, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=953, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=86163, PETRI_PLACES=890, PETRI_TRANSITIONS=1411} [2025-04-14 00:57:30,224 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 871 predicate places. [2025-04-14 00:57:30,224 INFO L485 AbstractCegarLoop]: Abstraction has has 890 places, 1411 transitions, 86163 flow [2025-04-14 00:57:30,224 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.8) internal successors, (120), 25 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:57:30,224 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:57:30,224 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:57:30,229 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2025-04-14 00:57:30,424 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2025-04-14 00:57:30,425 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:57:30,425 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:57:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash 8633550, now seen corresponding path program 60 times [2025-04-14 00:57:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:57:30,425 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109178830] [2025-04-14 00:57:30,425 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:57:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:57:30,428 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:57:30,433 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:57:30,433 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:57:30,433 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:57:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:57:30,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:57:30,676 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109178830] [2025-04-14 00:57:30,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109178830] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:57:30,676 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215559259] [2025-04-14 00:57:30,676 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-14 00:57:30,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:57:30,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:57:30,678 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:57:30,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2025-04-14 00:57:30,703 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:57:30,728 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:57:30,728 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-04-14 00:57:30,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:57:30,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-04-14 00:57:30,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:57:32,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:57:32,057 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:57:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:57:33,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215559259] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:57:33,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:57:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2025-04-14 00:57:33,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899672975] [2025-04-14 00:57:33,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:57:33,879 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 00:57:33,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:57:33,879 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 00:57:33,879 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2025-04-14 00:57:33,880 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:57:33,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 890 places, 1411 transitions, 86163 flow. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:57:33,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:57:33,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:57:33,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:57:49,375 INFO L116 PetriNetUnfolderBase]: 2605/5054 cut-off events. [2025-04-14 00:57:49,376 INFO L117 PetriNetUnfolderBase]: For 1157247/1157250 co-relation queries the response was YES. [2025-04-14 00:57:49,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117766 conditions, 5054 events. 2605/5054 cut-off events. For 1157247/1157250 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 39435 event pairs, 1 based on Foata normal form. 8/5039 useless extension candidates. Maximal degree in co-relation 117386. Up to 1925 conditions per place. [2025-04-14 00:57:49,462 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 513 selfloop transitions, 1026 changer transitions 14/1554 dead transitions. [2025-04-14 00:57:49,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 921 places, 1554 transitions, 94142 flow [2025-04-14 00:57:49,463 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-04-14 00:57:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-04-14 00:57:49,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 307 transitions. [2025-04-14 00:57:49,463 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4263888888888889 [2025-04-14 00:57:49,463 INFO L175 Difference]: Start difference. First operand has 890 places, 1411 transitions, 86163 flow. Second operand 40 states and 307 transitions. [2025-04-14 00:57:49,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 921 places, 1554 transitions, 94142 flow [2025-04-14 00:57:59,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 904 places, 1554 transitions, 92838 flow, removed 422 selfloop flow, removed 17 redundant places. [2025-04-14 00:57:59,566 INFO L231 Difference]: Finished difference. Result has 912 places, 1464 transitions, 91484 flow [2025-04-14 00:57:59,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=84904, PETRI_DIFFERENCE_MINUEND_PLACES=865, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=971, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=91484, PETRI_PLACES=912, PETRI_TRANSITIONS=1464} [2025-04-14 00:57:59,567 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 893 predicate places. [2025-04-14 00:57:59,567 INFO L485 AbstractCegarLoop]: Abstraction has has 912 places, 1464 transitions, 91484 flow [2025-04-14 00:57:59,568 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:57:59,568 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:57:59,568 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:57:59,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2025-04-14 00:57:59,768 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:57:59,768 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:57:59,769 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:57:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 116573070, now seen corresponding path program 61 times [2025-04-14 00:57:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:57:59,769 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344350956] [2025-04-14 00:57:59,769 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:57:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:57:59,772 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 00:57:59,776 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:57:59,776 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:57:59,776 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:58:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:58:00,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:58:00,137 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344350956] [2025-04-14 00:58:00,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344350956] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:58:00,137 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735790098] [2025-04-14 00:58:00,137 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-14 00:58:00,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:58:00,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:58:00,139 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:58:00,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2025-04-14 00:58:00,163 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-14 00:58:00,189 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:58:00,189 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-14 00:58:00,189 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:58:00,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 00:58:00,190 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:58:01,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:58:01,393 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:58:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:58:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735790098] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:58:03,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:58:03,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2025-04-14 00:58:03,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701861994] [2025-04-14 00:58:03,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:58:03,473 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2025-04-14 00:58:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:58:03,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2025-04-14 00:58:03,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2025-04-14 00:58:03,474 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:58:03,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 912 places, 1464 transitions, 91484 flow. Second operand has 28 states, 28 states have (on average 4.607142857142857) internal successors, (129), 28 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:58:03,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:58:03,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:58:03,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:58:17,911 INFO L116 PetriNetUnfolderBase]: 2603/5043 cut-off events. [2025-04-14 00:58:17,911 INFO L117 PetriNetUnfolderBase]: For 1191513/1191516 co-relation queries the response was YES. [2025-04-14 00:58:17,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118580 conditions, 5043 events. 2603/5043 cut-off events. For 1191513/1191516 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 39226 event pairs, 5 based on Foata normal form. 8/5028 useless extension candidates. Maximal degree in co-relation 118197. Up to 1951 conditions per place. [2025-04-14 00:58:18,003 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 532 selfloop transitions, 1030 changer transitions 20/1583 dead transitions. [2025-04-14 00:58:18,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 1583 transitions, 95918 flow [2025-04-14 00:58:18,004 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2025-04-14 00:58:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2025-04-14 00:58:18,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 423 transitions. [2025-04-14 00:58:18,005 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2025-04-14 00:58:18,005 INFO L175 Difference]: Start difference. First operand has 912 places, 1464 transitions, 91484 flow. Second operand 56 states and 423 transitions. [2025-04-14 00:58:18,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 1583 transitions, 95918 flow [2025-04-14 00:58:28,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 940 places, 1583 transitions, 94995 flow, removed 396 selfloop flow, removed 25 redundant places. [2025-04-14 00:58:28,269 INFO L231 Difference]: Finished difference. Result has 944 places, 1467 transitions, 92779 flow [2025-04-14 00:58:28,270 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=90573, PETRI_DIFFERENCE_MINUEND_PLACES=885, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=92779, PETRI_PLACES=944, PETRI_TRANSITIONS=1467} [2025-04-14 00:58:28,270 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 925 predicate places. [2025-04-14 00:58:28,271 INFO L485 AbstractCegarLoop]: Abstraction has has 944 places, 1467 transitions, 92779 flow [2025-04-14 00:58:28,271 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.607142857142857) internal successors, (129), 28 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:58:28,271 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:58:28,271 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:58:28,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2025-04-14 00:58:28,471 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2025-04-14 00:58:28,472 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:58:28,472 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:58:28,472 INFO L85 PathProgramCache]: Analyzing trace with hash -953659219, now seen corresponding path program 62 times [2025-04-14 00:58:28,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:58:28,472 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105450282] [2025-04-14 00:58:28,473 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:58:28,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:58:28,476 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:58:28,481 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:58:28,481 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:58:28,481 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:58:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:58:29,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:58:29,188 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105450282] [2025-04-14 00:58:29,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105450282] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:58:29,188 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861391973] [2025-04-14 00:58:29,188 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-14 00:58:29,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:58:29,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:58:29,190 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:58:29,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2025-04-14 00:58:29,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:58:29,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:58:29,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-14 00:58:29,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:58:29,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-14 00:58:29,238 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:58:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:58:32,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:58:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:58:34,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861391973] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:58:34,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:58:34,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2025-04-14 00:58:34,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861408672] [2025-04-14 00:58:34,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:58:34,537 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 00:58:34,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:58:34,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 00:58:34,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2025-04-14 00:58:34,537 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:58:34,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 1467 transitions, 92779 flow. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:58:34,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:58:34,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:58:34,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:58:39,278 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.07s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2025-04-14 00:58:51,496 INFO L116 PetriNetUnfolderBase]: 2665/5167 cut-off events. [2025-04-14 00:58:51,496 INFO L117 PetriNetUnfolderBase]: For 1253728/1253731 co-relation queries the response was YES. [2025-04-14 00:58:51,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124380 conditions, 5167 events. 2665/5167 cut-off events. For 1253728/1253731 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 40222 event pairs, 6 based on Foata normal form. 5/5149 useless extension candidates. Maximal degree in co-relation 124001. Up to 2941 conditions per place. [2025-04-14 00:58:51,589 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 984 selfloop transitions, 591 changer transitions 12/1588 dead transitions. [2025-04-14 00:58:51,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 974 places, 1588 transitions, 100637 flow [2025-04-14 00:58:51,590 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2025-04-14 00:58:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2025-04-14 00:58:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 275 transitions. [2025-04-14 00:58:51,590 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4243827160493827 [2025-04-14 00:58:51,590 INFO L175 Difference]: Start difference. First operand has 944 places, 1467 transitions, 92779 flow. Second operand 36 states and 275 transitions. [2025-04-14 00:58:51,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 974 places, 1588 transitions, 100637 flow [2025-04-14 00:59:03,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 937 places, 1588 transitions, 98950 flow, removed 315 selfloop flow, removed 37 redundant places. [2025-04-14 00:59:03,448 INFO L231 Difference]: Finished difference. Result has 944 places, 1505 transitions, 96139 flow [2025-04-14 00:59:03,449 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=91166, PETRI_DIFFERENCE_MINUEND_PLACES=902, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=96139, PETRI_PLACES=944, PETRI_TRANSITIONS=1505} [2025-04-14 00:59:03,449 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 925 predicate places. [2025-04-14 00:59:03,450 INFO L485 AbstractCegarLoop]: Abstraction has has 944 places, 1505 transitions, 96139 flow [2025-04-14 00:59:03,450 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:59:03,450 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:59:03,450 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:59:03,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2025-04-14 00:59:03,650 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2025-04-14 00:59:03,651 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:59:03,651 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:59:03,651 INFO L85 PathProgramCache]: Analyzing trace with hash -867771766, now seen corresponding path program 63 times [2025-04-14 00:59:03,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:59:03,652 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101723647] [2025-04-14 00:59:03,652 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:59:03,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:59:03,655 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:59:03,660 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:59:03,660 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:59:03,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:59:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:59:05,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:59:05,449 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101723647] [2025-04-14 00:59:05,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101723647] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:59:05,449 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119848811] [2025-04-14 00:59:05,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-14 00:59:05,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:59:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:59:05,451 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:59:05,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2025-04-14 00:59:05,475 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 17 statements into 3 equivalence classes. [2025-04-14 00:59:05,500 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:59:05,500 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-04-14 00:59:05,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:59:05,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-04-14 00:59:05,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 00:59:13,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:59:13,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 00:59:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:59:15,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119848811] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 00:59:15,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 00:59:15,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2025-04-14 00:59:15,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613266689] [2025-04-14 00:59:15,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 00:59:15,589 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-14 00:59:15,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 00:59:15,589 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-14 00:59:15,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=519, Unknown=1, NotChecked=0, Total=650 [2025-04-14 00:59:15,589 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 00:59:15,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 944 places, 1505 transitions, 96139 flow. Second operand has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:59:15,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 00:59:15,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 00:59:15,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-14 00:59:46,101 INFO L116 PetriNetUnfolderBase]: 2837/5465 cut-off events. [2025-04-14 00:59:46,101 INFO L117 PetriNetUnfolderBase]: For 1380816/1380819 co-relation queries the response was YES. [2025-04-14 00:59:46,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133681 conditions, 5465 events. 2837/5465 cut-off events. For 1380816/1380819 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 42953 event pairs, 4 based on Foata normal form. 9/5445 useless extension candidates. Maximal degree in co-relation 133303. Up to 1849 conditions per place. [2025-04-14 00:59:46,201 INFO L140 encePairwiseOnDemand]: 11/18 looper letters, 516 selfloop transitions, 1156 changer transitions 15/1688 dead transitions. [2025-04-14 00:59:46,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 986 places, 1688 transitions, 108245 flow [2025-04-14 00:59:46,201 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2025-04-14 00:59:46,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2025-04-14 00:59:46,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 346 transitions. [2025-04-14 00:59:46,202 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4271604938271605 [2025-04-14 00:59:46,202 INFO L175 Difference]: Start difference. First operand has 944 places, 1505 transitions, 96139 flow. Second operand 45 states and 346 transitions. [2025-04-14 00:59:46,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 986 places, 1688 transitions, 108245 flow [2025-04-14 00:59:58,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 964 places, 1688 transitions, 106899 flow, removed 452 selfloop flow, removed 22 redundant places. [2025-04-14 00:59:58,875 INFO L231 Difference]: Finished difference. Result has 976 places, 1597 transitions, 105680 flow [2025-04-14 00:59:58,876 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=18, PETRI_DIFFERENCE_MINUEND_FLOW=94836, PETRI_DIFFERENCE_MINUEND_PLACES=920, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=105680, PETRI_PLACES=976, PETRI_TRANSITIONS=1597} [2025-04-14 00:59:58,876 INFO L279 CegarLoopForPetriNet]: 19 programPoint places, 957 predicate places. [2025-04-14 00:59:58,876 INFO L485 AbstractCegarLoop]: Abstraction has has 976 places, 1597 transitions, 105680 flow [2025-04-14 00:59:58,877 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.653846153846154) internal successors, (121), 26 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 00:59:58,877 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-14 00:59:58,877 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-14 00:59:58,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2025-04-14 00:59:59,077 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:59:59,077 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2025-04-14 00:59:59,078 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-14 00:59:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1764263084, now seen corresponding path program 64 times [2025-04-14 00:59:59,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-14 00:59:59,078 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766536567] [2025-04-14 00:59:59,078 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:59:59,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-14 00:59:59,081 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:59:59,089 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:59:59,089 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:59:59,089 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:59:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 00:59:59,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-14 00:59:59,431 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766536567] [2025-04-14 00:59:59,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766536567] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-14 00:59:59,431 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162273875] [2025-04-14 00:59:59,431 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-14 00:59:59,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-14 00:59:59,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-14 00:59:59,433 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-04-14 00:59:59,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2025-04-14 00:59:59,456 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 17 statements into 2 equivalence classes. [2025-04-14 00:59:59,482 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-04-14 00:59:59,482 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-14 00:59:59,482 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-14 00:59:59,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-14 00:59:59,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-14 01:00:20,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:00:20,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-14 01:00:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-14 01:00:22,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162273875] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-14 01:00:22,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-14 01:00:22,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-04-14 01:00:22,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024221912] [2025-04-14 01:00:22,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-14 01:00:22,858 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-04-14 01:00:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-14 01:00:22,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-04-14 01:00:22,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=589, Unknown=3, NotChecked=0, Total=702 [2025-04-14 01:00:22,859 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 18 [2025-04-14 01:00:22,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 976 places, 1597 transitions, 105680 flow. Second operand has 27 states, 27 states have (on average 4.62962962962963) internal successors, (125), 27 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-14 01:00:22,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-14 01:00:22,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 18 [2025-04-14 01:00:22,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2025-04-14 01:00:54,026 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2025-04-14 01:00:54,027 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2025-04-14 01:00:54,028 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:00:54,028 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2025-04-14 01:00:54,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2025-04-14 01:00:54,228 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2025-04-14 01:00:54,228 WARN L610 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/18 universal loopers) in iteration 72,while PetriNetUnfolder was constructing finite prefix that currently has 17118 conditions, 853 events (401/852 cut-off events. For 331659/331662 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 7215 event pairs, 0 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 16859. Up to 326 conditions per place.). [2025-04-14 01:00:54,230 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2025-04-14 01:00:54,230 INFO L790 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2025-04-14 01:00:54,230 INFO L422 BasicCegarLoop]: Path program histogram: [64, 3, 2, 2, 1] [2025-04-14 01:00:54,233 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-14 01:00:54,233 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-14 01:00:54,236 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.04 01:00:54 BasicIcfg [2025-04-14 01:00:54,236 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-14 01:00:54,237 INFO L158 Benchmark]: Toolchain (without parser) took 841724.97ms. Allocated memory was 125.8MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 87.2MB in the beginning and 298.0MB in the end (delta: -210.8MB). Peak memory consumption was 805.3MB. Max. memory is 8.0GB. [2025-04-14 01:00:54,237 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 159.4MB. Free memory is still 88.0MB. There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:00:54,237 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.96ms. Allocated memory is still 125.8MB. Free memory was 87.2MB in the beginning and 71.5MB in the end (delta: 15.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2025-04-14 01:00:54,237 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.29ms. Allocated memory is still 125.8MB. Free memory was 71.5MB in the beginning and 70.0MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2025-04-14 01:00:54,237 INFO L158 Benchmark]: Boogie Preprocessor took 19.10ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 68.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. [2025-04-14 01:00:54,237 INFO L158 Benchmark]: IcfgBuilder took 394.67ms. Allocated memory is still 125.8MB. Free memory was 68.6MB in the beginning and 26.0MB in the end (delta: 42.6MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2025-04-14 01:00:54,238 INFO L158 Benchmark]: TraceAbstraction took 841086.07ms. Allocated memory was 125.8MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 25.3MB in the beginning and 298.0MB in the end (delta: -272.7MB). Peak memory consumption was 746.6MB. Max. memory is 8.0GB. [2025-04-14 01:00:54,239 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 159.4MB. Free memory is still 88.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.96ms. Allocated memory is still 125.8MB. Free memory was 87.2MB in the beginning and 71.5MB in the end (delta: 15.7MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.29ms. Allocated memory is still 125.8MB. Free memory was 71.5MB in the beginning and 70.0MB in the end (delta: 1.4MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.10ms. Allocated memory is still 125.8MB. Free memory was 70.0MB in the beginning and 68.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 8.0GB. * IcfgBuilder took 394.67ms. Allocated memory is still 125.8MB. Free memory was 68.6MB in the beginning and 26.0MB in the end (delta: 42.6MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. * TraceAbstraction took 841086.07ms. Allocated memory was 125.8MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 25.3MB in the beginning and 298.0MB in the end (delta: -272.7MB). Peak memory consumption was 746.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/18 universal loopers) in iteration 72,while PetriNetUnfolder was constructing finite prefix that currently has 17118 conditions, 853 events (401/852 cut-off events. For 331659/331662 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 7215 event pairs, 0 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 16859. Up to 326 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/18 universal loopers) in iteration 72,while PetriNetUnfolder was constructing finite prefix that currently has 17118 conditions, 853 events (401/852 cut-off events. For 331659/331662 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 7215 event pairs, 0 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 16859. Up to 326 conditions per place.). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (27states, 3/18 universal loopers) in iteration 72,while PetriNetUnfolder was constructing finite prefix that currently has 17118 conditions, 853 events (401/852 cut-off events. For 331659/331662 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 7215 event pairs, 0 based on Foata normal form. 2/1271 useless extension candidates. Maximal degree in co-relation 16859. Up to 326 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 24 locations, 29 edges, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 841.0s, OverallIterations: 72, TraceHistogramMax: 4, PathProgramHistogramMax: 64, EmptinessCheckTime: 0.0s, AutomataDifference: 529.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 6602 SdHoareTripleChecker+Valid, 92.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6602 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 88.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1851 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43669 IncrementalHoareTripleChecker+Invalid, 45525 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1851 mSolverCounterUnsat, 0 mSDtfsCounter, 43669 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3531 GetRequests, 1192 SyntacticMatches, 24 SemanticMatches, 2315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23529 ImplicationChecksByTransitivity, 347.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105680occurred in iteration=71, InterpolantAutomatonStates: 1764, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 294.5s InterpolantComputationTime, 2177 NumberOfCodeBlocks, 2176 NumberOfCodeBlocksAsserted, 286 NumberOfCheckSat, 3033 ConstructedInterpolants, 31 QuantifiedInterpolants, 58988 SizeOfPredicates, 853 NumberOfNonLiveVariables, 7175 ConjunctsInSsa, 880 ConjunctsInUnsatCore, 208 InterpolantComputations, 4 PerfectInterpolantSequences, 3/1236 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown